12 tools
Free Developer & SEO Tools
Small utilities for developers and SEO teams — keyword research, schema, robots.txt, llms.txt, encoding, IDs and QR codes — with 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
Robots.txt Generator
Generate an SEO-safe robots.txt file with Allow, Disallow, Crawl-delay, and Sitemap directives. Free, no signup, copy-ready output.
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Developer Tools
LLMs.txt Generator
Generate an llms.txt file for answer engines: summarize your site, list important pages, and provide citation notes. Free, no signup.
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Developer Tools
Schema Markup Generator
Generate JSON-LD schema markup for FAQPage, HowTo, and Article pages. Free SEO structured data tool with copy-ready output.
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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.
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Developer Tools
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.
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Developer Tools
Base64 Encoder & Decoder
Encode and decode Base64 in your browser with full Unicode and emoji support, plus the URL-safe variant. Nothing is uploaded. Free, no signup.
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Developer Tools
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.
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