devtiny.
Four small utilities. Everything runs in your browser — no server, no logging.
Base64 encode / decode
UTF-8 safe. Paste text or base64; the direction is auto-detected, or force it with the buttons.
URL encode / decode
Uses encodeURIComponent — safe for query-string values.
JSON format / minify
Also validates. Errors report line and column.
UUID v4 generator
Uses crypto.randomUUID() when available, falls back to a getRandomValues polyfill.