Developer
Format, convert, and explain text on this device.

Page: /category/developer
Text: /category/developer.txt

What this category does
- Format JSON, convert CSV, and encode Base64 or a URL.
- Decode a JWT header and payload, generate UUIDs, and test a regex.
- Explain a five-field cron expression or a Unix timestamp.

Tools
- JSON formatter: Pretty-print, minify, or sort keys, and show the parse error if the JSON is bad. (/tools/json-formatter.txt)
- CSV and JSON: Convert between CSV and JSON without breaking commas inside quotes. (/tools/csv-json-converter.txt)
- Base64: Encode or decode text and small files as standard or URL-safe Base64. (/tools/base64-encoder.txt)
- URL encode and decode: Encode a component, or a whole string, and decode percent-escapes. (/tools/url-encoder.txt)
- JWT decoder: Show the header and payload of a JSON Web Token. The signature is not checked. (/tools/jwt-decoder.txt)
- UUID v4: Generate version-4 UUIDs with crypto.randomUUID. (/tools/uuid-generator.txt)
- Regex tester: Try a pattern, list matches and groups, and replace. (/tools/regex-tester.txt)
- Cron explainer: Describe a five-field cron expression and list the next five local run times. (/tools/cron-explainer.txt)
- Unix timestamp: Convert seconds or milliseconds to a date, and a date or ISO string back to unix time. (/tools/timestamp-converter.txt)