Developer tools
Format, convert and encode data in your browser.
- JSON formatter
- Color picker
- Base64 decode
- Base64 encode
- HEX to RGB
- Unix timestamp converter
- Binary to decimal
- CSV to JSON
- JSON to CSV
- JSON validator
- JWT decoder
- Regex tester
- Text to binary
- UUID generator
- Binary to text
- CSS gradient generator
- CSV to Excel
- Excel to CSV
- RGB to HEX
- MD5 generator
- SHA-256 generator
- SQL formatter
- URL decode
- URL encode
- XML formatter
- XML to JSON
- Box shadow generator
- Cron expression generator
- Hash generator
- HTML formatter
- JSON to Excel
- Markdown to HTML
- YAML to JSON
- CSS minifier
- HTML to Markdown
- JavaScript minifier
- JSON to YAML
- JSON to XML
What is here
- Format, validate and minify JSON, XML, SQL, HTML, CSS and JavaScript.
- Convert data between JSON, CSV, YAML, XML and Excel.
- Encode and decode Base64, URLs and binary.
- Generate UUIDs and MD5 or SHA-256 hashes, decode JWTs and convert Unix timestamps.
- Test regular expressions, build cron schedules, and pick colors, gradients and shadows.
Safe for real data
API responses, tokens and customer files often contain secrets. These tools run entirely in your browser, so you can paste production data without handing it to a third party.
Developer tools FAQ
Are these developer tools free?
Yes. No sign-up, no watermark and no daily limit.
Do you store what I paste?
No. Nothing is sent or stored on a server. Some tools keep your last input in your own browser so a refresh does not lose it, and you can clear it anytime.
Does the JWT decoder verify signatures?
No. It decodes the header and payload so you can read them. Verification needs the signing key and belongs on your server.