Popular tools
Popular developer tools on Tools by RS Roshi — curated from the registry (not fake trending). Private, browser-first utilities.
JSON Formatter
PopularFormat, beautify, and minify JSON in your browser. Free, private, and instant — no upload to a server.
JSON Validator
PopularValidate JSON instantly in your browser. See type, size, and node counts — or exact parse errors with line and column.
JSON Viewer
PopularExplore JSON as an interactive tree with paths, types, and expandable nodes — all processed locally in your browser.
Base64 Encode / Decode
PopularNewEncode UTF-8 text to Base64 or decode Base64 back to text — instantly in your browser.
URL Encode / Decode
PopularNewPercent-encode text for URLs or decode encoded query strings — private and instant.
JWT Decode
PopularNewDecode JWT header and payload in your browser — inspect claims without uploading tokens.
UUID Generator
PopularNewGenerate UUID v4 identifiers in bulk — uppercase and hyphenless options, fully client-side.
Hash Generator
PopularNewGenerate SHA-1 / SHA-256 / SHA-384 / SHA-512 digests of text with Web Crypto — fully client-side.