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API Debugging Kit — JSON, JWT, Regex & Cron
The tools you reach for during API work: JSON format/diff, JWT decoding, regex testing, cron expression parsing, an HTTP status reference, Base64, UUIDs, and timestamp conversion. Tokens and payloads never leave your browser — safe for work data.
9 tools
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JSON Formatter
Format, validate, minify JSON
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JSON Diff
Diff two API responses
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JWT Decoder
Decode token header and payload
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Regex Tester
Live regex match testing
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Cron Parser
Cron expression → plain language
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HTTP Status Codes
Quick status-code reference
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Base64 Convert
Base64 encode/decode
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UUID Generator
Generate UUID v4s in bulk
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Unix Timestamp
Unix timestamp ↔ date