Web

HAR Viewer

HAR files contain URLs, headers and sometimes payloads. HAR Viewer keeps that sensitive network archive local while summarizing request counts, total time and slowest entries for debugging.

Parses HAR 1.2 exports locally. It does not replay requests or upload URLs, cookies or payloads.
network.har
har-report.txt2 entries
GET · 200148.0 ms

https://api.example.com/orders

application/json · 4210 bytes

POST · 40196.0 ms

https://api.example.com/orders

application/json · 188 bytes

runtime

Browser-local execution

Inputs stay inside the current tab unless you copy, download or explicitly export.

memory

Session handoff

Magic Paste can pass input to a target tool through sessionStorage, never through the URL.

control

User-owned state

Favorites, recent tools and workflow history are local browser data you can clear from the browser.

smart handoff graph

Suggested next moves

session handoff ready
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01

How to use

  1. 01Export HAR from browser DevTools.
  2. 02Paste the HAR JSON.
  3. 03Review slow requests and copy the local report.
02

FAQ

Does it replay requests?
No. It only parses and summarizes HAR data locally.
03

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