Free, fast, privacy-first developer tools. No signup needed. Everything runs in your browser.
Convert JSON objects to TypeScript interfaces and types instantly
#typescriptConvert CSV data to JSON and back with smart column detection
#dataTest regular expressions with live matching, flags, and replace
#regexEncode and decode Base64 strings with UTF-8 support
#encodingDecode JWT tokens and inspect header, payload, and signature
#authFormat and beautify SQL queries with customizable indentation
#sqlCompare two blocks of text side-by-side with highlighted differences
#diffGenerate UUID v4 identifiers in bulk with copy support
#uuidConvert Unix timestamps to readable dates and vice versa
#timeConvert between HEX, RGB, HSL, and named colors with preview
#colorAll processing happens locally in your browser. Nothing is sent to any server.
Every tool works instantly without creating an account or logging in.
Upgrade for API access, batch processing, file exports, and priority support.