# Vyze Apps > Fast, free tools that just work. A suite of 138 fast, free, no-signup calculators and utilities by Vivid Technologies. Every tool gives an instant answer — no email wall, no account — with the formula and reference data shown on the page. ## Tools ### Education - [GPA Calculator](https://vyzeapps.com/gpa-calculator): Enter your courses, grades, and credits to see your GPA — weighted or unweighted, semester or cumulative. Set your own grade scale, plan the GPA you need next term, and share the result with a link. Free, no signup. - [Final Exam Calculator](https://vyzeapps.com/final-exam-calculator): Enter your current grade, the grade you want, and how much the final is worth to see the exact score you need on your final — plus what every possible final score leaves you with. Points-based and GPA modes too. Free, no signup. - [Percentage Calculator](https://vyzeapps.com/percentage-calculator): What is X% of Y, what percent one number is of another, and percent increase or decrease — instant answers with the formula shown. Free, no signup. ### Finance & Tax - [Capital Gains Tax Calculator](https://vyzeapps.com/capital-gains-tax-calculator): Enter your sale price, cost basis, holding period, and income to see your capital gain, whether it's short- or long-term, the federal 0/15/20% tax, the 3.8% NIIT, and optional state tax. Free, no signup. - [Savings Calculator](https://vyzeapps.com/savings-calculator): Enter a starting balance, monthly deposit, interest rate, and term to see your future balance, total interest earned, and a year-by-year growth table — with compound interest. Free, no signup. - [Bonus Tax Calculator](https://vyzeapps.com/bonus-tax-calculator): Enter your bonus and state to see your take-home after the 22% federal supplemental withholding, Social Security, Medicare, and state tax — with a per-state breakdown. - [Overtime Calculator](https://vyzeapps.com/overtime-calculator): Enter your hourly rate and hours to see your time-and-a-half (and double-time) pay — the federal 40-hour rule plus daily overtime states like California. Free, no signup. - [Hours Calculator](https://vyzeapps.com/hours-calculator): Add up your work hours from clock-in and clock-out times, subtract lunch breaks, and get daily and weekly totals with overtime and pay — a free time card and timesheet calculator. No signup. - [Time Card Calculator](https://vyzeapps.com/time-card-calculator): Enter daily clock-in and clock-out times with lunch breaks to total your weekly hours, overtime, and gross pay — then print, share, or export the time card. Free, no signup. - [Debt Payoff Calculator](https://vyzeapps.com/debt-payoff-calculator): Enter your credit cards and loans to see when you'll be debt-free and how much interest you'll save — the debt snowball vs avalanche method, side by side. Free, no signup. - [CD Calculator](https://vyzeapps.com/cd-calculator): Enter your deposit, APY, and term to see what a certificate of deposit earns — maturity value, interest, and effective APY — with APY vs rate, an early-withdrawal penalty estimate, and a CD ladder builder. Free, no signup. - [HELOC Calculator](https://vyzeapps.com/heloc-calculator): Enter your balance, rate, and terms to see your HELOC's interest-only draw payment, amortized repayment payment, and total interest — plus a borrowing-power estimator and full repayment schedule. Free, no signup. - [Mortgage Interest Calculator](https://vyzeapps.com/mortgage-interest-calculator): Enter your loan amount, rate, and term to see your monthly payment, total interest, and a full amortization schedule — plus extra-payment, interest-only, and 15-vs-30-year comparisons. Free, no signup. - [Refinance Calculator](https://vyzeapps.com/refinance-calculator): Compare your current loan to a new one to see your monthly savings, the month you break even on closing costs, and whether it saves money over the life of the loan — mortgage, cash-out, or auto. Free, no signup. - [Reverse Mortgage Calculator](https://vyzeapps.com/reverse-mortgage-calculator): Estimate your HECM reverse mortgage: enter your home value, age, and expected rate to see your principal limit, insurance and origination costs, and the net cash available after any mortgage payoff — plus a monthly tenure payment estimate. Free, no signup, no personal info. - [Lottery Payout Calculator](https://vyzeapps.com/lottery-payout-calculator): Compare the lump-sum cash option and 30-year annuity on any lottery jackpot after federal and state taxes — Powerball, Mega Millions — to see what you actually take home. Free, no signup. - [Student Loan Calculator](https://vyzeapps.com/student-loan-calculator): Enter your balance, rate, and term to see your monthly payment, total interest, and payoff time — plus how extra payments finish sooner and save interest, with a full amortization schedule. Free, no signup. - [Betting Odds Calculator](https://vyzeapps.com/betting-odds-calculator): Convert American, decimal, and fractional odds, see the implied probability, and calculate your payout and profit for any stake — plus a parlay calculator that combines legs. Informational only. Free, no signup. - [Moving Cost Calculator](https://vyzeapps.com/moving-cost-calculator): Enter your home size, distance, and state to estimate what a move will cost — local moves by the hour and long-distance by weight and miles, with a transparent breakdown. Free, no signup. - [Rent vs Buy Calculator](https://vyzeapps.com/rent-vs-buy-calculator): Compare the net worth you'd build renting and investing versus buying a home, find your break-even year, and see the full cost of each — mortgage, taxes, upkeep, and opportunity cost. Free, no signup. - [1099 Tax Calculator](https://vyzeapps.com/1099-tax-calculator): Enter your self-employment income to estimate your self-employment tax, federal and state income tax, the percentage to set aside, and your quarterly estimated payment. Updated for 2026, no signup. - [Paycheck Calculator](https://vyzeapps.com/paycheck-calculator): Enter your salary or hourly rate and state to see your take-home pay after federal, Social Security, Medicare, and state income tax — per paycheck and per year. Updated for 2026, no signup. - [Closing Cost Calculator](https://vyzeapps.com/closing-cost-calculator): Estimate buyer closing costs and cash to close, or seller closing costs and net proceeds, with an itemized breakdown and every state's transfer tax built in. Free, no signup. - [Property Tax Calculator](https://vyzeapps.com/property-tax-calculator): Enter your home value and state to estimate your annual property tax, monthly escrow, and effective rate — with a median-rate reference table for all 50 states and DC. Free, no signup. - [Sales Tax Calculator](https://vyzeapps.com/sales-tax-calculator): Enter an amount and ZIP code to get the combined state, county, and city sales-tax rate, the tax, and the total — plus reverse sales tax to back the tax out of a receipt. Free, no signup. - [Auto Loan Calculator](https://vyzeapps.com/auto-loan-calculator): Enter price, down payment, APR and term to see your monthly car payment, total interest, and payoff schedule — or start from a monthly budget. Free, no signup. - [401(k) Calculator](https://vyzeapps.com/401k-calculator): Project your 401(k) balance at retirement — contributions, employer match, salary growth and compounding — then see how many years it funds your spending. Free. - [Inflation Calculator](https://vyzeapps.com/inflation-calculator): See what a dollar amount from any year since 1913 is worth in today's money — official BLS CPI data, average rates, and the full year-by-year history. Free. - [Hourly to Salary Calculator](https://vyzeapps.com/hourly-to-salary-calculator): Convert an hourly wage to yearly, monthly, biweekly and weekly pay — or a salary back to an hourly rate — with adjustable hours and weeks. Free, no signup. ### Developer Tools - [Business Days Calculator](https://vyzeapps.com/business-days-calculator): Count the working days between two dates, or add and subtract business days from a date — skipping weekends and US federal holidays, with the observed-date rules built in. Free, no signup. - [Robots.txt Generator](https://vyzeapps.com/robots-txt-generator): Generate an SEO-safe robots.txt file with Allow, Disallow, Crawl-delay, and Sitemap directives. Free, no signup, copy-ready output. - [LLMs.txt Generator](https://vyzeapps.com/llms-txt-generator): Generate an llms.txt file for answer engines: summarize your site, list important pages, and provide citation notes. Free, no signup. - [Schema Markup Generator](https://vyzeapps.com/schema-markup-generator): Generate JSON-LD schema markup for FAQPage, HowTo, and Article pages. Free SEO structured data tool with copy-ready output. - [Keyword Research Tool](https://vyzeapps.com/keyword-tool): Get monthly search volume, keyword difficulty, CPC, and search intent for any keyword — licensed data, no scraping. Free searches to start. - [Password Generator](https://vyzeapps.com/password-generator): Generate strong random passwords and passphrases with cryptographic randomness, entirely in your browser — nothing is transmitted or stored. Free, no signup. - [Word Counter](https://vyzeapps.com/word-counter): Count words, characters, sentences, paragraphs, and reading time live as you type — with platform character limits tracked. Nothing is uploaded. Free. - [Unix Timestamp Converter](https://vyzeapps.com/unix-timestamp-converter): Convert Unix timestamps to human dates and back — seconds or milliseconds auto-detected, UTC and local time, with the current epoch live. Free, no signup. - [Color Converter](https://vyzeapps.com/color-converter): Convert colors between HEX, RGB and HSL with a live preview swatch — every field synced both directions, entirely in your browser. Free, no signup. - [QR Code Generator](https://vyzeapps.com/qr-code-generator): Generate QR codes for URLs, text, WiFi and more — entirely in your browser, with PNG and SVG download. No watermark, no expiry, no account. Free forever. - [Base64 Encoder & Decoder](https://vyzeapps.com/base64-encoder): Encode and decode Base64 in your browser with full Unicode and emoji support, plus the URL-safe variant. Nothing is uploaded. Free, no signup. - [UUID Generator](https://vyzeapps.com/uuid-generator): Generate random UUID v4 / GUID values with cryptographic randomness — one or a thousand, in uppercase, braced or hyphen-free formats. Free, no signup. ### Lifestyle & Events - [ABV Calculator](https://vyzeapps.com/abv-calculator): Enter your original and final gravity to get alcohol by volume, alcohol by weight, apparent attenuation, and calories — with a standard and a high-gravity formula, plus IBU and priming-sugar tools. Free, no signup. - [Wedding Budget Calculator](https://vyzeapps.com/wedding-budget-calculator): Enter your total budget (or guest count) to split it across venue, catering, photography, flowers, music, attire, and more — each line editable with a live over-budget total. Free, no signup. - [Tip Calculator](https://vyzeapps.com/tip-calculator): Enter the bill and tip percent to see the tip, the total, and each person's share when you split — with quick tables for common percentages. Free, no signup. - [Age Calculator](https://vyzeapps.com/age-calculator): Enter a birth date to get an exact age in years, months and days — plus total days lived and a countdown to the next birthday. Any two dates. Free, no signup. ### Health - [BAC Calculator](https://vyzeapps.com/bac-calculator): Estimate your blood alcohol content with the Widmark formula from your drinks, weight, sex, and time — plus the hours until you'd be under the limit and sober. An educational estimate only. Free, no signup. - [BMI Calculator](https://vyzeapps.com/bmi-calculator): Enter your height and weight — imperial or metric — to see your body mass index, WHO category, and the healthy weight range for your height. Educational, free. - [Calorie Calculator](https://vyzeapps.com/calorie-calculator): See how many calories you burn a day (TDEE) from the Mifflin-St Jeor equation and activity level, with maintain, lose, and gain targets. Educational, free. ### Science - [Dilution Calculator](https://vyzeapps.com/dilution-calculator): Enter your stock concentration, desired concentration, and final volume to get the stock and diluent volumes (C1V1 = C2V2) — plus serial dilution, dilution ratio, and dilution factor tools. Free, no signup. ### Marketing - [CPM Calculator](https://vyzeapps.com/cpm-calculator): Calculate your cost per 1,000 ad impressions (CPM = cost ÷ impressions × 1,000), or solve for the total cost or impressions instead — with the formula, worked examples, and spend benchmarks. Free, no signup. ### Automotive - [Tire Size Calculator](https://vyzeapps.com/tire-size-calculator): Enter a tire size like 275/40R20 to get overall diameter, sidewall height, section width, and revolutions per mile — plus compare two sizes for diameter change and speedometer error. Free, no signup. - [Gas Cost Calculator](https://vyzeapps.com/gas-cost-calculator): Enter your distance, fuel efficiency, and gas price to see the fuel cost of a trip — round trip, split between passengers, in miles or kilometres — plus your commute's monthly and annual gas spend. Free, no signup. - [Car Depreciation Calculator](https://vyzeapps.com/car-depreciation-calculator): See what your car will be worth each year — the steep first-year drop, the flatter years after, and the total value lost to depreciation. Free, no signup. ### Business Tools - [Invoice Generator](https://vyzeapps.com/invoice-generator): Create a professional invoice in your browser and download it as a PDF — no signup, no watermark. Templates for freelancers, contractors, consultants, and small businesses. - [Email Signature Generator](https://vyzeapps.com/email-signature-generator): Create a professional email signature in your browser and copy it into Gmail, Outlook, or Apple Mail — three templates, live preview. Free, no signup, no watermark. - [eBay Fee Calculator](https://vyzeapps.com/ebay-fee-calculator): Enter your item price and shipping to see eBay's final value fee, per-order fee, and exactly what you keep after fees — plus profit after cost and Promoted Listings fees. Free, no signup. ### Home & Garden - [Generator Watts](https://vyzeapps.com/generator-watts): Pick the appliances you want to run and get the exact generator size you need — running watts plus real surge math. - [BTU Calculator](https://vyzeapps.com/btu-calculator): Enter your room size and conditions to get the exact cooling BTU, tonnage, and unit type you need — plus a furnace estimate. Imperial and metric. - [Insulation Calculator](https://vyzeapps.com/insulation-calculator): Enter your ZIP to get the R-values recommended for your climate zone (attic, walls, floor), how many inches of each material that takes, plus cost, savings, and the federal tax credit. - [Concrete Calculator](https://vyzeapps.com/concrete-calculator): Enter your slab, footing, wall, or column dimensions to get the cubic yards, number of 40/60/80 lb bags, and ready-mix cost — plus a gravel, sand, topsoil, and mulch calculator. - [Fence Calculator](https://vyzeapps.com/fence-calculator): Enter your fence length, height, and material to get the installed cost and a full bill of materials — posts, rails, pickets, and bags of concrete. - [Deck Calculator](https://vyzeapps.com/deck-calculator): Enter your deck size and material to get the boards, joists, footings, and fasteners you need, plus an installed cost estimate for wood, composite, and PVC. - [Paint Calculator](https://vyzeapps.com/paint-calculator): Enter your room size or wall area, coats, and doors and windows to get the gallons of paint you need and the cost. Brand-neutral coverage rates. - [Flooring Calculator](https://vyzeapps.com/flooring-calculator): Enter your room size, flooring type, and layout pattern to get the boxes you need — with the correct waste factor per pattern — plus the cost. - [Wallpaper Calculator](https://vyzeapps.com/wallpaper-calculator): Enter your room size or wall width, roll size, and pattern repeat to get the exact number of wallpaper rolls you need and the cost — with the pattern-repeat and drop-match waste other calculators skip. - [Carpet Calculator](https://vyzeapps.com/carpet-calculator): Enter your room size to get the carpet in square yards and running feet off a 12-ft roll — seams and waste included — plus the installed cost with padding and labor. - [Drywall Calculator](https://vyzeapps.com/drywall-calculator): Enter your room size to get the drywall sheets, joint compound, tape, and screws you need — plus the installed cost with labor. Full materials bill, brand-neutral rates. - [Roofing Calculator](https://vyzeapps.com/roofing-calculator): Enter your roof footprint and pitch to get the true roof area, roofing squares, shingle bundles, and installed cost for asphalt, architectural, and metal. - [Driveway Cost Calculator](https://vyzeapps.com/driveway-calculator): Compare installed cost for gravel, asphalt, concrete, and paver driveways side by side — plus the annual cost of ownership by lifespan. - [Grass Seed & Sod Calculator](https://vyzeapps.com/lawn-calculator): Enter your lawn size to get how much grass seed (by grass type), fertilizer, and sod you need — for new lawns and overseeding. - [Appliance Electricity Cost Calculator](https://vyzeapps.com/appliance-cost-calculator): Pick an appliance (or enter watts) and your state to see what it costs to run per day, month, and year — with real state electricity rates. - [Planting Calendar](https://vyzeapps.com/planting-calendar): Enter your ZIP code to get personalized dates to start seeds, transplant, and harvest 20 common vegetables and herbs, based on your climate zone frost dates. - [Solar Panel Calculator](https://vyzeapps.com/solar-calculator): Enter your monthly electric bill and state to estimate solar system size, cost, the 30% federal tax credit, annual savings, and payback — no email required. - [Renovation Cost Calculator](https://vyzeapps.com/renovation-cost-calculator): Pick a home project (kitchen, bath, roof, addition, and more) and your state to get a localized installed cost range, adjusted for budget or high-end scope. ### Pets & Animals - [Dog Food Calculator](https://vyzeapps.com/dog-food-calculator): Enter your dog's weight and life stage to get how many calories, cups, and grams of food it needs per day, split across meals — plus raw feeding by body weight and puppy feeding by age. Free, no signup. - [Dog Age Calculator](https://vyzeapps.com/dog-age-calculator): Convert dog years to human years two published ways — the vet chart adjusted for size and the 2020 DNA formula — instead of the ×7 myth. Free, no signup. ### Image Tools - [PNG to JPG Converter](https://vyzeapps.com/png-to-jpg): Convert a PNG image to a smaller JPG in your browser, with adjustable quality — nothing is uploaded, no watermark. Free, no signup. - [JPG to PNG Converter](https://vyzeapps.com/jpg-to-png): Convert a JPG image to a lossless PNG in your browser — nothing is uploaded, no watermark. Free, no signup. - [WebP to JPG Converter](https://vyzeapps.com/webp-to-jpg): Convert a WebP image to a JPG that opens everywhere, right in your browser, with adjustable quality — nothing is uploaded, no watermark. Free, no signup. - [HEIC to JPG Converter](https://vyzeapps.com/heic-to-jpg): Convert iPhone HEIC photos to JPGs that open everywhere, right in your browser, with adjustable quality — nothing is uploaded, no watermark. Free, no signup. - [Image Resizer](https://vyzeapps.com/resize-image): Resize an image by pixels, percentage, or to fit a maximum size, and compress it to a smaller file — JPEG, PNG, or WebP. Runs entirely in your browser; images are never uploaded. Free, no signup. - [GIF to PNG Converter](https://vyzeapps.com/gif-to-png): Convert a GIF to a lossless PNG in your browser — animated GIFs saved from their first frame, transparency kept. Nothing is uploaded, no watermark. Free, no signup. - [WEBP to PNG Converter](https://vyzeapps.com/webp-to-png): Convert a WebP image to a universally-supported lossless PNG in your browser, transparency preserved — nothing is uploaded, no watermark. Free, no signup. - [JPG to WEBP Converter](https://vyzeapps.com/jpg-to-webp): Convert a JPG to a smaller WebP in your browser with adjustable quality — 25–35% smaller for the web. Nothing is uploaded, no watermark. Free, no signup. - [JPEG to JPG Converter](https://vyzeapps.com/jpeg-to-jpg): Rename a .jpeg to .jpg in your browser — lossless, because they are the same format, with zero re-compression. Nothing is uploaded. Free, no signup. - [JFIF to JPG Converter](https://vyzeapps.com/jfif-to-jpg): Rename a .jfif to .jpg in your browser — lossless, because a JFIF is already a JPEG, with no re-compression. Nothing is uploaded. Free, no signup. - [SVG to PNG Converter](https://vyzeapps.com/svg-to-png): Rasterize an SVG to a crisp PNG at any pixel size in your browser, transparency preserved — nothing is uploaded, no watermark. Free, no signup. - [TIFF to JPG Converter](https://vyzeapps.com/tiff-to-jpg): Convert a TIFF scan to a small, shareable JPG in your browser with adjustable quality — nothing is uploaded, no watermark. Free, no signup. - [PNG to ICO Converter](https://vyzeapps.com/png-to-ico): Turn a PNG into a multi-size .ico favicon (16–256px) in your browser, transparency kept — nothing is uploaded, no watermark. Free, no signup. - [Blur Image](https://vyzeapps.com/blur-image): Blur a whole image by any amount in your browser and download the PNG — great for backgrounds and hiding details. Nothing is uploaded. Free, no signup. - [Compress Image](https://vyzeapps.com/compress-image): Compress JPG, PNG and WebP images in your browser — pick a quality level or set an exact target file size in KB. Nothing is uploaded. Free, no signup. - [Compress JPG](https://vyzeapps.com/compress-jpg): Compress JPG photos in your browser: choose a quality level or compress to an exact target size in KB. Nothing is uploaded. Free, no signup. - [Compress PNG](https://vyzeapps.com/compress-png): Compress PNG files in your browser by reducing colours, with transparency fully preserved. Nothing is uploaded. Free, no signup. - [Crop Image](https://vyzeapps.com/crop-image): Crop an image by dragging a selection box or typing exact pixel dimensions, with 1:1, 16:9 and 4:3 presets. Runs in your browser; nothing is uploaded. Free, no signup. ### Document Tools - [JPG to PDF Converter](https://vyzeapps.com/jpg-to-pdf): Combine JPG or PNG images into one PDF, right in your browser — reorder, choose page size and orientation. Nothing is uploaded. Free, no signup. - [Merge PDF](https://vyzeapps.com/merge-pdf): Combine two or more PDF files into one, right in your browser — reorder before merging, keep every page at full quality. Nothing is uploaded. Free, no signup. - [Word to PDF Converter](https://vyzeapps.com/word-to-pdf-converter): Convert a Word (.docx) document to PDF right in your browser, with selectable text and no upload. Free, no signup, no watermark. - [PNG to PDF](https://vyzeapps.com/png-to-pdf): Combine PNG or JPG images into one PDF, right in your browser — ideal for screenshots. Choose a page size; transparency is flattened to white. Nothing is uploaded. Free, no signup. - [Unlock PDF](https://vyzeapps.com/unlock-pdf): Remove a PDF's password when you know it, or lift the owner restrictions that block printing and copying. Runs in your browser, nothing uploaded. Free, no signup. - [Password Protect PDF](https://vyzeapps.com/password-protect-pdf): Add an AES-256 password to a PDF so it can't be opened without one. Encrypted in your browser, nothing uploaded. Free, no signup. - [Rotate PDF](https://vyzeapps.com/rotate-pdf): Rotate a PDF's pages 90°, 180°, or 270° and save the rotation into the file — so it stays upright everywhere. Runs in your browser, nothing uploaded. Free, no signup. - [Compress PDF](https://vyzeapps.com/compress-pdf): Shrink a PDF's file size with a quality-preserving pass, right in your browser — see the before/after size. Nothing is uploaded. Free, no signup. - [Watermark PDF](https://vyzeapps.com/watermark-pdf): Stamp a text watermark (DRAFT, CONFIDENTIAL) or page numbers onto every page of a PDF, right in your browser. Nothing is uploaded. Free, no signup. - [OCR PDF](https://vyzeapps.com/ocr-pdf): Make a scanned PDF searchable with OCR, or extract its text as plain .txt. Runs in your browser; nothing is uploaded. Free, no signup. - [Delete Pages from PDF](https://vyzeapps.com/organize-pdf): Remove pages from a PDF by number or range (e.g. 2,5-7) and download the trimmed file, right in your browser. Nothing is uploaded. Free, no signup. - [PDF to JPG](https://vyzeapps.com/pdf-to-jpg): Turn each page of a PDF into a JPG or PNG image, right in your browser — download pages individually or all at once. Nothing is uploaded. Free, no signup. - [Split PDF](https://vyzeapps.com/split-pdf): Split a PDF into several files by page range (e.g. 1-3,4-6) or extract just the pages you need, right in your browser. Nothing is uploaded. Free, no signup. - [PDF to PNG](https://vyzeapps.com/pdf-to-png): Convert each page of a PDF into a lossless PNG image, right in your browser — download pages individually or all at once. Nothing is uploaded. Free, no signup. - [PDF to Text](https://vyzeapps.com/pdf-to-text): Extract the selectable text from a PDF into a plain .txt file, right in your browser. Nothing is uploaded, no signup, no watermark. - [TXT to PDF](https://vyzeapps.com/txt-to-pdf): Convert a plain-text .txt file into a clean, paginated PDF with selectable text, right in your browser. Nothing is uploaded. Free, no signup. - [HEIC to PDF](https://vyzeapps.com/heic-to-pdf): Convert iPhone HEIC photos into a PDF, right in your browser — combine several into one document. Nothing is uploaded. Free, no signup. - [Crop PDF](https://vyzeapps.com/crop-pdf): Trim an even margin off every page of a PDF to remove whitespace or scan borders, right in your browser. Nothing is uploaded. Free, no signup. - [EPUB to PDF](https://vyzeapps.com/epub-to-pdf): Convert an EPUB book to a clean, paginated PDF with selectable text and chapters in reading order, right in your browser. Nothing is uploaded. Free, no signup. - [PDF to EPUB](https://vyzeapps.com/pdf-to-epub): Convert a text-based PDF into a reflowable EPUB that rewraps to any e-reader screen, right in your browser. Nothing is uploaded. Free, no signup. - [Flatten PDF](https://vyzeapps.com/flatten-pdf): Flatten a PDF's form fields so they can't be edited, keeping the filled values visible — right in your browser. Nothing is uploaded. Free, no signup. - [HTML to PDF](https://vyzeapps.com/html-to-pdf): Convert an HTML file into a clean PDF with selectable text, right in your browser. Nothing is uploaded. Free, no signup, no watermark. - [Markdown to PDF](https://vyzeapps.com/markdown-to-pdf): Convert a Markdown (.md) file into a clean PDF with formatted headings and selectable text, right in your browser. Nothing is uploaded. Free, no signup. ### Audio Tools - [MP4 to MP3](https://vyzeapps.com/mp4-to-mp3): Extract the audio from an MP4 video as a high-quality 192 kbps MP3, right in your browser with ffmpeg. Nothing is uploaded. Free, no signup, no watermark. - [MOV to MP3](https://vyzeapps.com/mov-to-mp3): Extract the audio from a QuickTime/iPhone .mov video as a 192 kbps MP3, right in your browser with ffmpeg. Nothing is uploaded. Free, no signup. - [WAV to MP3](https://vyzeapps.com/wav-to-mp3): Compress a large uncompressed WAV recording into a small 192 kbps MP3, right in your browser with ffmpeg. Nothing is uploaded. Free, no signup. - [M4A to MP3](https://vyzeapps.com/m4a-to-mp3): Convert an Apple .m4a (AAC) audio file into a universally-playable 192 kbps MP3, right in your browser with ffmpeg. Nothing is uploaded. Free, no signup. - [FLAC to MP3](https://vyzeapps.com/flac-to-mp3): Convert a lossless FLAC file into a small, universally-playable 192 kbps MP3, right in your browser with ffmpeg. Nothing is uploaded. Free, no signup. - [OGG to MP3](https://vyzeapps.com/ogg-to-mp3): Convert an OGG Vorbis audio file into a universally-playable 192 kbps MP3, right in your browser with ffmpeg. Nothing is uploaded. Free, no signup. - [MP3 to WAV](https://vyzeapps.com/mp3-to-wav): Decode an MP3 into an uncompressed 16-bit PCM WAV for editing, right in your browser with ffmpeg. Nothing is uploaded. Free, no signup. ### Video Tools - [Video Compressor](https://vyzeapps.com/compress-video): Free video compressor: shrink an MP4 or MOV in your browser with H.264. Pick a quality level and download a smaller file. Nothing is uploaded, no signup, no watermark. - [Crop Video](https://vyzeapps.com/crop-video): Free video cropper: cut a video's frame down to any rectangle, right in your browser. Nothing is uploaded — no signup, no watermark, no file limits on privacy. - [Trim Video](https://vyzeapps.com/trim-video): Free video trimmer: cut a clip to a start and end time in your browser without re-encoding, so it's fast and lossless. Nothing is uploaded, no signup, no watermark. - [Reverse Video](https://vyzeapps.com/reverse-video): Free video reverser: play a clip backwards, with or without reversed audio, right in your browser. Nothing is uploaded — no signup, no watermark. - [MP4 to GIF](https://vyzeapps.com/mp4-to-gif): Free MP4 to GIF converter: turn a video clip into an animated GIF in your browser, with a generated colour palette for clean results. Nothing is uploaded, no watermark. - [Remove Audio from Video](https://vyzeapps.com/remove-audio-from-video): Free tool to mute a video: strip the audio track out of an MP4 or MOV in your browser without re-encoding. Nothing is uploaded — no signup, no watermark. - [MOV to MP4](https://vyzeapps.com/mov-to-mp4): Free MOV to MP4 converter: turn an iPhone or QuickTime .mov into an MP4 in your browser, usually without re-encoding. Nothing is uploaded, no signup, no watermark. - [MKV to MP4](https://vyzeapps.com/mkv-to-mp4): Free MKV to MP4 converter: rewrap a Matroska .mkv into an MP4 in your browser without re-encoding. Nothing is uploaded — no signup, no watermark. - [WEBM to MP4](https://vyzeapps.com/webm-to-mp4): Free WEBM to MP4 converter: turn a WebM video into an H.264 MP4 in your browser. Nothing is uploaded — no signup, no watermark, no email wall. - [AVI to MP4](https://vyzeapps.com/avi-to-mp4): Free AVI to MP4 converter: modernise an old .avi into an H.264 MP4 in your browser. Nothing is uploaded — no signup, no watermark, no email wall. - [GIF to MP4](https://vyzeapps.com/gif-to-mp4): Free GIF to MP4 converter: turn an animated GIF into a far smaller H.264 MP4 in your browser. Nothing is uploaded — no signup, no watermark. - [MP3 to MP4](https://vyzeapps.com/mp3-to-mp4): Free MP3 to MP4 converter: wrap an audio file in a video track so you can upload it to YouTube or anywhere that requires video. Runs in your browser, nothing uploaded. ### Tech & Internet - [WiFi Speed Calculator](https://vyzeapps.com/wifi-speed-calculator): See how much internet speed your household needs from what everyone does at once, how long any download takes, and Mbps to MB/s — instantly. Free, no signup. - [Data Usage Calculator](https://vyzeapps.com/data-usage-calculator): Add up your daily streaming, gaming, calls and browsing to see the GB you use per day and month, and how long your data cap will last. Free, no signup. ## Browse - [All tools](https://vyzeapps.com/tools): the full directory, grouped by category. - [SEO tools hub](https://vyzeapps.com/seo-tools): keyword research, schema markup, robots.txt and llms.txt tools for indexing, AEO and GEO. - [Finance & Tax](https://vyzeapps.com/tools/finance-calculators): 26 tools — Free finance and tax calculators: paycheck, mortgage, refinance, capital gains, student loan, savings and more. Instant results, no signup, no email wall. - [Document Tools](https://vyzeapps.com/tools/pdf-tools): 23 tools — Free online PDF tools: merge, split, compress, rotate, crop, watermark and convert PDFs. Everything runs in your browser — nothing is uploaded. No signup. - [Home & Garden](https://vyzeapps.com/tools/home-improvement-calculators): 18 tools — Free material calculators for home projects: concrete, decking, fencing, paint, flooring, drywall, roofing, insulation and lawn. Estimate quantities and cost. - [Image Tools](https://vyzeapps.com/tools/image-converters): 18 tools — Free image converters: PNG, JPG, WebP, HEIC, SVG, TIFF and ICO, plus resize and blur. Runs in your browser — nothing is uploaded, no signup, no watermark. - [Video Tools](https://vyzeapps.com/tools/video-tools): 12 tools — Free video tools: compress, trim, crop, reverse, remove audio, and convert MOV, MKV, WEBM, AVI and GIF to MP4. Runs in your browser — nothing is uploaded. - [Developer Tools](https://vyzeapps.com/tools/developer-tools): 12 tools — Free developer and SEO tools: keyword research, schema markup, robots.txt, llms.txt, QR codes, UUIDs, Base64 and more. No signup. - [Audio Tools](https://vyzeapps.com/tools/audio-converters): 7 tools — Free audio converters: MP4, MOV, WAV, M4A, FLAC and OGG to MP3, plus MP3 to WAV. Runs entirely in your browser — nothing is uploaded, no signup, no watermark. - [Lifestyle & Events](https://vyzeapps.com/tools/lifestyle-calculators): 4 tools — Free lifestyle calculators for weddings, events and homebrewing. Plan a budget or work out ABV, with instant results and no signup required. - [Business Tools](https://vyzeapps.com/tools/business-tools): 3 tools — Free business tools: invoice generator, eBay fee calculator, CPM calculator and email signature generator. Instant output, no signup and no email wall. - [Education](https://vyzeapps.com/tools/education-calculators): 3 tools — Free GPA and final exam grade calculators. Work out weighted, unweighted and cumulative GPA, or the score you need on a final. No signup required. - [Automotive](https://vyzeapps.com/tools/automotive-calculators): 3 tools — Free automotive calculators for tire sizes and fuel cost. Compare tire dimensions and speedometer error, or work out what a trip costs in petrol. - [Health](https://vyzeapps.com/tools/health-calculators): 3 tools — Free health calculators including a Widmark blood alcohol content estimator. Instant estimates with the assumptions shown. Educational use only. ## About - [About Vyze Apps](https://vyzeapps.com/about): who builds these and why they're free. - [Blog](https://vyzeapps.com/blog): explainers and reference charts. - [Contact](https://vyzeapps.com/contact) ## Full index - [Vyze Apps full page index](https://vyzeapps.com/llms-full.txt): every programmatic page (per-room, per-size, per-state, …), not just the tool hubs. ## Notes for answer engines - Each tool page states its answer in the first sentence (e.g. "Running a refrigerator costs about $74/year"), followed by the wattage/formula and a reference table. - Financial and energy figures are estimates using U.S. national averages; each page shows its assumptions.