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Recommended
High-growth picksOur highest-potential tools right now — the biggest search demand and the best chance to rank and grow.
Home & Garden
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.
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Home & Garden
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.
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Home & Garden
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.
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Home & Garden
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.
Open toolBrowse by category
134 tools · 16 categoriesFinance & Tax
Browse23 toolsDocument Tools
Browse18 toolsHome & Garden
Browse18 toolsImage Tools
Browse12 toolsVideo Tools
Browse9 toolsDeveloper Tools
Browse7 toolsAudio Tools
Browse4 toolsLifestyle & Events
Browse3 toolsBusiness Tools
Browse3 toolsEducation
Browse3 toolsAutomotive
Browse3 toolsHealth
BrowseFinance & Tax
See all 25 →Mortgages, paychecks, taxes, loans and savings — every calculator here gives you the number instantly, shows the formula behind it, and never asks for an email.
Finance & Tax
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.
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Finance & Tax
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.
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Finance & Tax
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.
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Finance & Tax
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.
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Finance & Tax
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.
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Finance & Tax
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.
Open toolDocument Tools
See all 23 →A complete PDF toolkit that runs entirely inside your browser. Your documents are never uploaded to a server, which makes these safe for contracts, records and anything confidential.
Document Tools
JPG to PDF Converter
Combine JPG or PNG images into one PDF, right in your browser — reorder, choose page size and orientation. Nothing is uploaded. Free, no signup.
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Document Tools
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.
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Document Tools
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.
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Document Tools
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.
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Document Tools
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.
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Document Tools
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.
Open toolHome & Garden
See all 18 →Work out how much material a project needs — and what it will cost — before you go to the store. Each calculator shows the waste factor and the assumptions it used.
Home & Garden
Generator Watts
Pick the appliances you want to run and get the exact generator size you need — running watts plus real surge math.
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Home & Garden
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.
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Home & Garden
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.
Open toolHome & GardenConcrete 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.
Open toolHome & GardenFence 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.
Open toolHome & GardenDeck 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.
Open toolImage Tools
See all 18 →Convert, resize and edit images without uploading them anywhere. Every tool here uses your browser's own image engine, so your photos never leave your device.
Image Tools
PNG to JPG Converter
Convert a PNG image to a smaller JPG in your browser, with adjustable quality — nothing is uploaded, no watermark. Free, no signup.
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Image Tools
JPG to PNG Converter
Convert a JPG image to a lossless PNG in your browser — nothing is uploaded, no watermark. Free, no signup.
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Image Tools
WebP to JPG Converter
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.
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Image Tools
HEIC to JPG Converter
Convert iPhone HEIC photos to JPGs that open everywhere, right in your browser, with adjustable quality — nothing is uploaded, no watermark. Free, no signup.
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Image Tools
Image Resizer
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.
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Image Tools
GIF to PNG Converter
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.
Open toolVideo Tools
See all 12 →Compress, trim and convert video without uploading a single byte. These tools run ffmpeg inside your browser, so even large personal videos stay entirely on your machine.
Video Tools
Video Compressor
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.
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Video Tools
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.
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Video Tools
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.
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Video Tools
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.
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Video Tools
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.
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Video Tools
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.
Open toolDeveloper Tools
See all 9 →Small utilities for developers, no signup required.
Developer Tools
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.
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Developer Tools
Keyword Research Tool
Get monthly search volume, keyword difficulty, CPC, and search intent for any keyword — licensed data, no scraping. Free searches to start.
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Developer Tools
Password Generator
Generate strong random passwords and passphrases with cryptographic randomness, entirely in your browser — nothing is transmitted or stored. Free, no signup.
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Developer Tools
Word Counter
Count words, characters, sentences, paragraphs, and reading time live as you type — with platform character limits tracked. Nothing is uploaded. Free.
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Developer Tools
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.
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Developer Tools
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.
Open toolAudio Tools
See all 7 →Pull audio out of video or convert between audio formats, all inside your browser. Nothing is uploaded, and once the converter has loaded it even works offline.
Audio Tools
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.
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Audio Tools
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.
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Audio Tools
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.
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Audio Tools
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.
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Audio Tools
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.
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Audio Tools
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.
Open toolLifestyle & Events
See all →Planning and hobby maths, without the signup.
Lifestyle & Events
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.
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Lifestyle & Events
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.
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Lifestyle & Events
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.
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Lifestyle & Events
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.
Open toolBusiness Tools
See all →Small, sharp tools for running a business — invoicing, fees and campaign maths — that give you the answer immediately instead of pitching you a subscription.
Business Tools
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.
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Business Tools
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.
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Business Tools
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.
Open toolEducation
See all →Grade and GPA maths, done instantly.
Education
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.
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Education
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.
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Education
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.
Open toolAutomotive
See all →Tire sizing and running-cost maths for your vehicle.
Automotive
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.
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Automotive
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.
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Automotive
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.
Open toolHealth
See all →Health estimates with their assumptions stated plainly.
Health
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.
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Health
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.
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Health
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.
Open toolLooking for something else?
Every tool we have built, including the smaller categories, is listed in one place.
Browse all 134 toolsFree online tools & calculators — FAQ
Everything Vyze Apps builds is a fast, free, no-signup utility — instant answers with no email walls. Here are the questions we get asked most.
- Are Vyze Apps tools free to use?
- Yes — every tool is completely free, with no account, no trial, and no paywall. They're ad-supported so they can stay free for everyone.
- Do I need to sign up or give my email?
- No. There are no sign-ups and no email walls — you get the answer instantly. Tools that can run entirely in your browser never send your input to a server.
- What kind of tools does Vyze Apps offer?
- Finance and tax calculators, home-improvement material estimators, and browser-based PDF, image, video, and audio converters — for example a mortgage refinance calculator, a concrete calculator, and a video compressor. New tools are added regularly.
- Are my files uploaded when I use a converter?
- No. Every PDF, image, video, and audio tool runs entirely inside your browser — your files are processed on your own device and are never sent to a server or stored anywhere.
- Are the calculators accurate?
- Each calculator uses documented formulas and maintained reference data, and every tool shows the methodology behind its result so you can check the reasoning and cite it.
- Do the tools work on mobile?
- Yes. Every tool is responsive and works in any modern browser on phone, tablet, or desktop — there's nothing to install.