RUST · WEBASSEMBLY · PRIVATE DATA

Validate and deduplicate JSONL

Clean AI datasets, logs and API records locally. Rust WASM validates each JSON line and pinpoints an invalid physical line instead of silently removing records.

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Select a JSONL / NDJSON file (or drop it here)Up to 15 MB · UTF-8 · No login · No upload

Normalize JSON values (compare semantically, including key order) Remove duplicates (keep first occurrence and original order) Skip blank lines; if unchecked, blank lines are errors

Only the same-origin Worker and WASM are fetched. File contents are handled by your CPU in this browser without cloud API calls.

Each line must be an independent JSON value. Normalization can change whitespace, key ordering and some number formatting, so it is not byte-preserving. Disable normalization when exact original text matters. Invalid JSON aborts the operation rather than silently deleting records.

Validate and deduplicate JSONL

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