Developer Tools / Guided kit
Developer Debug Kit for APIs and Data
Debug JSON, JWTs, Base64, URLs, regex patterns and API responses with focused browser tools.
8 ordered stepsNo forced signupExisting ToolsFam tools only
Outcome
Move from a confusing payload or failing request to readable data, decoded claims, safer URLs and a reproducible API check.
Who This Helps
Useful for frontend, backend, QA, support and DevOps workflows where small data issues block progress.
Workflow Steps
01Format and validate JSONJSON FormatterMake API responses, webhooks and config snippets readable first.Open tool
02Compare expected vs actual JSONJSON Compare / DiffSpot changed fields, missing keys and unexpected values.Open tool
03Decode tokensJWT DecoderInspect claims, expiry and audience without trusting the token blindly.Open tool
04Decode encoded segmentsBase64 Encoder / DecoderUnderstand Base64 values found in headers, auth and payloads.Open tool
05Fix encoded URLsURL Encoder / DecoderDecode or encode query values before retesting requests.Open tool
06Test matching logicRegex TesterCheck validation patterns against real sample strings.Open tool
07Re-run the requestAPI PlaygroundInspect status, headers, timing and response body in one place.Open tool
08Explain the status codeHTTP Status Code ExplainerTurn 4xx and 5xx responses into a practical debug checklist.Open tool
Related Workflows
Developer Debug Kit FAQ
Is API Playground fully local?
No. Browser CORS limits mean API Playground may use a server-side proxy, and the page explains that tradeoff.
Can I paste production tokens?
Avoid production secrets in web tools. Local decoding reduces exposure, but careful handling still matters.
Where should I start?
Start with JSON Formatter for payloads, JWT Decoder for tokens and API Playground for reproducible requests.