Developer Tools
Everyday utilities for working with APIs and data formats: formatting unreadable JSON, decoding a Base64 blob, checking what is actually inside a token, or generating an identifier.
These tools run entirely in your browser — nothing you paste is sent to a server. That said, treat any third-party website with caution when handling production secrets. If a value would cause real damage if leaked, decode it locally with your own tooling instead.
All developer tools
- JSON FormatterFormat JSON with indentation and pinpoint syntax errors.
- JSON ValidatorCheck JSON syntax and see exactly where an error is.
- JSON MinifierStrip whitespace from JSON and see the bytes saved.
- Base64 EncoderEncode text to Base64, with full Unicode support.
- Base64 DecoderDecode Base64 to text, standard or URL-safe.
- URL EncoderPercent-encode text for URLs, by component or whole address.
- URL DecoderDecode percent-encoded URLs and read the query parameters.
- UUID GeneratorGenerate v4 or time-ordered v7 UUIDs in bulk.
- Unix Timestamp ConverterConvert Unix timestamps to dates, in UTC and local time.
- JWT DecoderDecode a JWT to inspect its header, payload and claims.