HAR/JSON viewer

Visualizes HTTP Archive (HAR) files opened locally or online. Also features JSON tree view for HAR and any structured JSON files.

HAR/JSON Viewer: Visualize & Optimize Web Performance

HAR/JSON Viewer is a Chrome extension, designed to visualize HTTP Archive (HAR) and structured JSON files. It allows users to open HAR & JSON files either locally or online, showcasing them in an easily digestible tree view. Additionally, it features the facility to switch between HAR, JSON tree, and the original views. A useful tool for web developers focusing on performance optimization, it requires permissions to access File URLs for working with local files.
Install from Chrome Web Store

Extension stats

Manifest V3
Users: 10,000+
Rating: 4.00
(4)
Version: 1.5.0 (Last updated: 2021-10-28)
Creation date: 2020-09-15
Permissions:
  • activeTab
  • scripting
Size: 136.19K
Full description: See detailed description

Other platforms

Not available on Android
HAR/JSON viewer (v1.3.0)
877 5.00 (6)
Not available on Edge

User reviews

Compare to the HAR file viewer provided by Chrome, this one is better. The visualization shows the network logs very detailed and informative. Thank author
by Tấn Lộc Võ, 2023-08-08

works well. instructions could saved me some time. instructions: drop har file into chrome. open extensions and a request from this plugin would show. accept it and you will view the plugin analysis.
by Leonid Beilis, 2023-05-09

It doesn't work at all. Yes, allow access to file URLs is on. Yes, the icon is visible at the top. Loading a HAR file just shows the JSON, nothing else. Clicking the icon for this does nothing. If there's something else to do, then that needs to be in the instructions for the extension. I see 2 others having the same problem in the Support pane. I guess the extension has rotted.
by Kevin Brannen, 2022-08-04
View all user reviews

Extension safety

Risk impact

HAR/JSON viewer does not require any sensitive permissions.

Risk impact analysis details
  • Low Request access to the following domains:
Risk likelihood

We don't have sufficient data to confidently determine the risk likelihood of HAR/JSON viewer. Use it at your own risk.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
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