Nutter Tools
Nutter Tools

A free toolbox that runs in your browser. A tool for every job.

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© Nutter Toolsnutter.tools
  1. Home
  2. Web & auth
  3. HAR file viewer
Your files stay on your device

HAR file viewer

Open a HAR log locally to see totals, breakdowns by type and host, the twenty slowest and largest requests, and failures, then download a redacted copy safe to share.

This tool is in beta

Still being tested. If a result looks wrong, tell us.

Report a problem

HAR file

Nothing opened

Everything here runs on this device. Nothing is uploaded. Sizes recorded as -1 count as zero, and response bodies only exist in a HAR when the browser captured them, so their redaction count is often zero. This is a summary, not a debugger: there is no waterfall timeline, no request replay, and entries past the ceiling are counted but not analyzed.

Summary and export

What the export keeps

URLs, timings, statuses, and header names are untouched. Secret header values (authorization, cookies, API keys, anything with token, secret, session, or credential in the name), sensitive query values, post bodies, and response bodies read as redacted markers instead.

Files up to 8 MB of text parse here, with the first 20,000 entries analyzed. The slowest, largest, and host lists keep 20 rows; failures and redirects keep the first 100 of each.

Runs on this device. Nothing is uploaded.

More web & auth tools

  • HTTP header parser
  • HTTP status reference
All web & auth tools

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