Free, fast, no-signup developer tools + guides.
JSON, Base64, Regex, UUID, URL encoding — all in one place.
No ads. No tracking. Everything runs client-side in your browser.
Format, validate & minify JSON instantly
Open Tool →Encode & decode Base64 strings and files
Open Tool →Test regex patterns with real-time matching
Open Tool →Encode & decode URLs and query strings
Open Tool →Generate v4 UUIDs instantly
Open Tool →MD5, SHA-1, SHA-256 hash generation
Open Tool →Compare text and find differences
Open Tool →Decode and inspect JSON Web Tokens
Open Tool →Build & test cron expressions visually
Open Tool →Convert Unix timestamps to dates and back
Open Tool →No fluff. Just tools that respect your time.
Just open and use. No accounts, no paywalls, no friction.
Everything runs in your browser. Your data never leaves your machine.
No loading spinners, no ads, no popups. Just paste and go.
Fully responsive. Developer tools in your pocket, anywhere.
In-depth articles to level up your workflow.
Building a RAG pipeline from scratch — practical guide for developers with code examples and best practices.
Content Security Policy headers setup guide — practical guide for developers with code examples and best practices.
Monitoring your side projects without breaking the bank — practical guide for developers with code examples and best practices.
YAML advanced features most developers miss — practical guide for developers with code examples and best practices.
Modern JavaScript features you should be using — practical guide for developers with code examples and best practices.
Docker tips for faster local development — practical guide for developers with code examples and best practices.
DevToolKit started because we were tired of ad-riddled, slow, bloated tool sites. Every tool here is free, fast, and private — built with the same standards we'd want for ourselves.
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