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.
Automating repetitive dev tasks with scripts — practical guide for developers with code examples and best practices.
How to use structured output with the latest LLMs — practical guide for developers with code examples and best practices.
LLM API integration patterns for applications — practical guide for developers with code examples and best practices.
OAuth 2.0 implementation guide for web apps — practical guide for developers with code examples and best practices.
Database options for side projects — practical guide for developers with code examples and best practices.
Web Workers for heavy computation in the browser — 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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