Developer Tools
Format, validate and encode data for everyday development tasks.
JSON Formatter
Format and beautify JSON instantly in your browser.
JSON Validator
Check if your JSON is valid and see helpful error details.
JSON Minifier
Minify JSON by removing whitespace to reduce file size.
Base64 Encoder
Encode text or data into Base64 format instantly.
Base64 Decoder
Decode Base64 strings back into readable text.
URL Encoder
Encode text for safe use in URLs.
URL Decoder
Decode percent-encoded URLs back into readable text.
UUID Generator
Generate random UUID v4 identifiers instantly.
Timestamp Converter
Convert Unix timestamps to readable dates and back.
HTML Formatter
Format and indent messy HTML markup instantly.
Which developer tool do you need?
| If you want to… | Use |
|---|---|
| Read or check JSON from an API | JSON Formatter or JSON Validator |
| Make JSON as small as possible | JSON Minifier |
| See what's inside a token or encoded value | Base64 Decoder |
| Put text safely into a link | URL Encoder |
| Read a Unix time from a log | Timestamp Converter |
| Create unique IDs | UUID Generator |
Good to know
- Encoding is not encryption. Base64 and URL encoding change how data is written, not who can read it. Anyone can decode them.
- Pasted data stays local. API responses, tokens and config values are processed in your browser and never logged or uploaded.
- Formatting doesn't change data. Formatting and minifying only change whitespace; keys, values and their order stay the same.
- Seconds or milliseconds? A 10-digit timestamp is in seconds and a 13-digit one in milliseconds. The converter works out which.