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Curated Tool Collections
API Data Review Kit
Offline suite

API Data Review Kit

Format, validate, and compare JSON API responses with a guided step-by-step workflow.

Suite security
100% client-side

No cloud uploads. Supported processors run locally and remain available offline after caching.

2

Offline utilities curated in this suite

Try itJSON FormatterFormat, validate, and pretty-print JSON with indentation options, key sorting, and RFC 8259 diagnostics. 100% browser-local.
Try itText Diff CheckerCompare text files side-by-side with instant difference highlighting. Client-side — no upload.

Curated Step Workflow

API Payload Review

Turn a captured JSON response into a readable document, then compare it with a known reference payload.

1
JSON Formatter →

Paste the captured response, validate its JSON syntax, and format it with stable indentation.

2
Text Diff Checker →

Compare the formatted current payload with the formatted reference and review each added, removed, or changed line.