STREAM · INSPECT · VALIDATE
Open the JSON your editor would rather not.
Inspect large JSON, JSONL and NDJSON locally with streaming validation, bounded previews and progressive structure profiling.
File stays on this device
Drop a .json, .jsonl or .ndjson file
The file is streamed locally. It is not uploaded or copied into browser storage.
—File size
—Format
—Root / lines
0Valid records
0Invalid records
0Profile paths
—Elapsed
WaitingStatus
FIND / SCAN
Search the entire local file
Runs a new bounded worker scan; up to 250 matches are retained.Text mode scans object keys and primitive values without uploading the file.
INSPECT
Stream results
#LocatorPreviewTypeAction
Open a file and run a streaming scan.
100-record previewThe interface never creates one DOM row for every record in a huge file.
64 KiB per previewSingle giant values are visibly truncated instead of duplicating them into the page.
Worker-isolated parsingThe large-file parser runs away from the UI thread and can be stopped by terminating the worker.
No upload or persistenceFiles stay local and are not written to LocalStorage, IndexedDB or a server.