FREE BROWSER-LOCAL FILE TOOLS

Edit JSON files in your browser.

Open or paste JSON, inspect its structure, edit, format or minify it. Your contents stay in this browser.

Step 1: open your fileOpen JSON, JSONL or NDJSON to inspect and edit. File tools are loading…Supports .json, .jsonl and .ndjson. Contents stay in this browser.

Inspect the source, Tree or Table; edit and review validation feedback.
Download the result in your document’s format.

Paste JSON

File contents stay in this browser. Download changes before refreshing or closing the tab.

Inspect nested structure

Searchable tree and raw editor views make nested objects, arrays, keys, values, and record boundaries easier to inspect.

Edit, format and validate

Open JSON, JSONL or NDJSON, inspect the data, edit it and download the result. Syntax problems are reported without sending the document to a server.

Choose the matching format

Use JSON for one complete value, JSONL or NDJSON for one JSON value per line.

Questions about this tool

Does JSON file editor upload my file?

No. Selected and pasted contents are parsed in your browser.

Can I edit and validate the document?

Yes. Edit locally, validate the result, then download a new file.