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Compare two CSV files side by side.
Decode JWT header and payload locally for API debugging.
Write and format GraphQL queries; load schema JSON and inspect types locally.
Test JavaScript regular expressions with flags, multiline text, and capture groups locally.
Open CSV in an editable grid, search and export, runs locally in your browser.
Open Excel in an editable grid; edit cells and export locally.
Browse Parquet in an editable grid and export back to .parquet locally.
Paste, edit, prettify JSON payloads, and search with JSONPath locally.
Paste or load YAML/JSON, edit the spec, then browse paths, operations, and request/response contracts.
Drop openapi.yaml / openapi.json
All parsing happens locally in your browser.
Spec (YAML or JSON)