Developer tools
Encode, decode, format and generate: JWT, URL, Base64, JSON, hashes, UUIDs and more. Free, fast, and nothing to install.
URL encoder / decoderPercent-encode text for URLs, or decode it back.JWT decoder / encoderRead a JSON Web Token, verify it, or sign a new one.Base64 encoder / decoderEncode text or files to Base64, or decode it.JSON formatterPretty-print, minify and validate JSON.Hash generatorMD5, SHA-1, SHA-256, SHA-512 and HMAC of text or files.UUID generatorRandom v4 or time-ordered v7 UUIDs, in bulk.Timestamp converterUnix time to a date, and a date to Unix time.HTML entity encoderEscape text for HTML, or unescape entities.Regex testerTest a regular expression with live highlights.Text compareSee the differences between two texts.Case convertercamelCase, snake_case, kebab-case, Title Case and more.Password generatorStrong random passwords and passphrases.CSV ↔ JSON converterTurn CSV into JSON, or JSON into CSV.Colour converterHEX, RGB, HSL and OKLCH, with contrast check.Number base converterBinary, octal, decimal and hexadecimal.
About our Developer tools
Free online developer tools that run entirely in your browser, so tokens, secrets and data never leave your device. Decode and sign JWTs, URL-encode or Base64-encode text, format and validate JSON, generate hashes, UUIDs and strong passwords, convert timestamps, colours and number bases, test regular expressions and compare text.