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HAR File Viewer

Open browser network captures: waterfall, filters, headers, bodies, copy as cURL, and save a copy with secrets removed.

Free, no uploads, no sign-up. Runs 100% in your browser.

How HAR File Viewer works

The HAR file is read as JSON and drawn as a request list with a timeline. Pick a request for its headers, query and body, response and timing phases. The redacted copy replaces cookies, authorization headers and token-like query values with REDACTED, so you can share it safely.

Input: HAR, JSON. Output: HAR, cURL.

How to use HAR File Viewer

1. Open HAR File Viewer and paste or type your input.
2. Results update instantly as you type.
3. Tweak options such as format, indentation or algorithm.
4. Copy the output or download it as a file.

Tips

• Everything is computed locally. Safe for tokens, keys and private data.
• Use Ctrl/⌘ + K to jump between developer tools quickly.

HAR File Viewer FAQ

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

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