HAR viewer
Summarize a pasted HAR locally while keeping bodies, cookies and sensitive request values out of the report.
How it works & useful details
Local-only workspace
This tool converts or inspects pasted text in your browser. It never sends a request, opens a URL, uploads a HAR, or stores your input.
Privacy-aware HAR overview
Up to 500 entries are summarized locally. Request URLs are listed without being opened; request-header secrets, cookies, and all response bodies are excluded from the output.
About this tool
HAR viewer summarizes a pasted HAR (HTTP Archive) file into a readable list of requests with methods, status codes, sizes, and timings. It is a quick way to inspect what a browser session did without opening developer tools again.
The report is built locally and deliberately omits sensitive values: request and response bodies, cookies, and authorization headers are left out of the summary instead of being reprinted. Use it to understand traffic shape, not to extract payloads.
How to use it
- Copy the HAR JSON from your browser’s network panel or a saved file.
- Paste it into the input area; the workspace parses it locally.
- Review the summarized entries, statuses, sizes, and timings.
- Export the sanitized summary as text for a ticket or note.
Worked example
A HAR file with a single GET request to https://api.example.com/v1/notes produces an overview with 1 entry, a total recorded time of 84 ms, and 128 bytes of response content. The request table shows the method, status 200, URL, timing, and size. The Authorization header is suppressed, and response bodies and cookies are never shown or exported.
Getting and sharing HAR files safely
In Chrome, Edge, or Firefox, open DevTools, go to the Network panel, reproduce the problem, and choose "Save all as HAR" (or "Export HAR"). Support teams often ask for one when a page loads slowly or a request fails.
A raw HAR file can contain everything your browser sent and received: session cookies, bearer tokens, form fields, and full response bodies with personal data. Leaked HAR files have been used to hijack sessions. Review an overview like this one first to find the requests that matter. Newer browser versions can export sanitized HAR files without cookies and auth headers. Use that option, or share a redacted excerpt instead of the whole file.
Frequently asked questions
Can I see the request or response bodies?
No. Bodies, cookies, and sensitive header values are intentionally excluded from the report so the summary stays safe to share.
What size HAR can I paste?
Up to 750,000 characters. Larger captures should be filtered in the browser before pasting.
Does it fetch anything from the HAR entries?
No. Entries are summarized as text; no URL from the archive is contacted.
How can I find the slowest requests?
The overview lists the recorded time of every entry. Sort the exported table by the time column in a spreadsheet to spot slow requests. Up to 500 entries are summarized.