Developer Tools
JSON, Base64, hashing, regex, JWT, and other web-developer everyday tools. Everything runs in your browser using native APIs — no server, no logging, no rate limits.
JSON Formatter
Format, validate, and minify JSON — pretty-print or compact, with error pinpoints.
Open tool →Base64 Encoder / Decoder
Encode or decode Base64 strings — works for plain text and binary data.
Open tool →URL Encoder / Decoder
Convert special characters to and from percent-encoded form for query strings.
Open tool →HTML Entity Encoder
Escape ampersands, angle brackets, and quotes for HTML-safe templates and emails.
Open tool →Hash Generator
Compute SHA-1, SHA-256, and SHA-512 digests in the browser via Web Crypto.
Open tool →JWT Decoder
Inspect a JWT's header, payload, and signature — decoded client-side.
Open tool →Regex Tester
Test JavaScript regular expressions live with highlighted matches and capture groups.
Open tool →CSV ↔ JSON Converter
Convert tabular data between CSV and JSON in either direction — handles quoting.
Open tool →