Developer Tools
The small utilities you reach for many times a day. Everything runs locally in your browser, so the tokens, payloads and keys you paste here never leave your machine — which matters when the data comes from production.
13 tools
- Base64 Encoder / DecoderConvert text to Base64 and back. Handles Arabic and any Unicode text correctly.
- JSON Formatter & ValidatorFormat, minify and validate JSON. Errors point to the exact position.
- URL Encoder / DecoderPercent-encode and decode URLs, and split a query string into readable lines.
- HTML Entities Encoder / DecoderConvert & to & and back. Optionally escape every non-ASCII character.
- Unicode Escape / UnescapeTurn Arabic and any Unicode text into \u escapes and back. Essential for JSON and source files.
- JWT DecoderDecode a JSON Web Token and read its header, payload and expiry.
- UUID GeneratorGenerate UUID v4 and v7 identifiers, one at a time or in bulk.
- Unix Timestamp ConverterConvert Unix timestamps to dates and back, with ISO, local, Hijri and relative time.
- Number Base ConverterConvert between binary, octal, decimal, hex and any base up to 36. Handles very large numbers.
- Color Converter & Contrast CheckerConvert HEX, RGB and HSL, and check WCAG contrast against white and black.
- Hash & HMAC GeneratorSHA-1, SHA-256, SHA-384 and SHA-512, plain or as HMAC with a secret.
- Broken Encoding Fixer (Mojibake)Repair text mangled by the wrong encoding — مرØبا back to مرحبا, ü back to ü.
- Case ConverterConvert between camelCase, snake_case, kebab-case, PascalCase and CONSTANT_CASE.