Developer tools
Format and validate JSON, encode and decode Base64 and URLs, decode JWTs, test regexes and generate UUIDs on your device. Free, with no account.
- JSON formatter
Pretty-print JSON.
- JSON validator
Check that text is JSON.
- JSON viewer
Show JSON keys and values.
- JSON minifier
Remove JSON whitespace.
- JSON diff
Show whether two JSON values match.
- Base64 encode
Encode text as Base64.
- Base64 decode
Decode Base64 text.
- URL encode
Encode text for a URL.
- URL decode
Decode URL text.
- URL parser
Split a URL into its parts.
- HTML entity encoder
Escape HTML characters.
- HTML entity decoder
Turn HTML entities back into characters.
- Hash generator
Hash text with SHA-256.
- UUID generator
Create a random UUID.
- Unix timestamp converter
Turn a Unix time into a date, or now into Unix time.
- Markdown to HTML
Turn a small Markdown set into HTML.
- Lorem ipsum generator
Generate placeholder paragraphs.
- Password generator
Generate a random password on this device.
- Random string generator
Generate a random string.
- Binary to hex
Convert binary text to hex.
- Hex to binary
Convert hex text to binary.
- Text to hex
Show UTF-8 bytes as hex.
- Hex to text
Turn hex bytes back into text.
- Unicode inspector
Show the name-free code point of each character.
- Color converter
Turn a hex color into RGB.
- Query string builder
Join key=value lines into a query string.
- HTTP status codes
Look up a common HTTP status code.
- MIME type lookup
Look up a MIME type from a file extension.
- Cron helper
Describe a five-field cron expression.
- Nano ID generator
Create a short random id.
- Checksum calculator
SHA-256 a piece of text.
- ASCII table
Show printable ASCII characters.
- JWT decoder
Show the header and payload of a JWT.
- Regex tester
Show matches for a regular expression.
- Diff checker
Show lines that differ between two texts.