HAR inspector and masker
Web & HTTP
The HAR is read on your device only. Recorded URLs are never contacted and requests are never replayed.
Choose a .har or .json file, or drop it here.
Pasted JSON works too. Choosing a file loads it here.
Comma separated. Only values of headers that survive the allowlist are masked.
Result
Load a HAR to see the result here.
How to use
Load the HAR
Pick a .har saved from DevTools or paste the JSON. The file is read on your device and the recorded URLs are never contacted.
Compare transfer and hosts
The per-host summary and the waterfall compare counts, known transfer and time. Requests without a recorded transfer size count as unknown, not as zero bytes.
Build the shareable HAR
Choose whether to mask every query value and drop paths, review the preview, then download. The original HAR is left untouched.
Scope of the result
Up to 16,777,216 UTF-16 code units, 250,000 nodes, depth 96 and 20,000 requests. The table shows the first 500 entries. The shareable HAR copies only known fields from an allowlist and writes header and body sizes as unknown. It does not fully anonymise, replay traffic, keep vendor extensions or restore transfer sizes.
Frequently asked questions
- Does it contact the URLs in the HAR?
- No. It only analyses the recording. Requests are never replayed and external bodies are never fetched.
- What is removed from the shareable HAR?
- Cookies, request and response bodies, headers outside the allowlist, page titles and unknown extension fields are not copied. By default every query value is masked too.
- Is the shareable HAR fully anonymous?
- No. Host names, timestamps, query names, kept paths and allowed header values can still identify people. Review the preview before sharing.
- Why is a transfer size shown as unknown?
- The original HAR did not record it. The decompressed body size is not substituted for the transfer size, so it is counted as unknown.
- Can the shareable HAR replay the original traffic?
- No. Bodies and credentials are removed on purpose, so the output is not meant for replay or faithful reproduction.
- Is the original HAR overwritten?
- No. The shareable HAR is a separate download and the original file stays on your device.