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

Latest Version

Version
1.5.0
Update
October 28, 2021
Size
133KiB
Developer
Category
Users
10,000+
Rating
4 ★
Manifest Version
3
Web Store Status
Languages Support
English
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Permissions
ActiveTab
Scripting
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HAR/JSON viewer Extension

Embedded HAR/JSON viewer. Visualizes HTTP Archive (HAR) files opened locally or online. Also features JSON tree view for HAR and any structured JSON files. Allows to switch between HAR (if available), JSON tree and plain (original) views.
Note: In order to get this viewer working with local files you have to grant the respective permission: chrome://extensions -> HAR/JSON viewer -> Details -> Allow access to File URLs.
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 3, "name": "HAR/JSON viewer", "description": "Visualizes HTTP Archive (HAR) files opened locally or online. Also features JSON tree view for HAR and any structured JSON files.", "version": "1.5.0", "permissions": [ "activeTab", "scripting" ], "background": { "service_worker": "background.js" }, "icons": { "16": "icon-colored-16.png", "32": "icon-colored-32.png", "64": "icon-colored-64.png", "128": "icon-colored-128.png" }, "web_accessible_resources": [ { "resources": [ "harviewer/*", "connection.js" ], "matches": [ "" ] } ], "action": { "default_icon": { "16": "icon-colored-16.png", "32": "icon-colored-32.png" }, "default_title": "HAR/JSON viewer" }}
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How to download and manually install HAR/JSON viewer extension for Chrome

Looking for a way to install HAR/JSON viewer extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install HAR/JSON viewer extensions manually, this article outlines two simple methods to effortlessly install HAR/JSON viewer extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download HAR/JSON viewer extension and manually install through Drag &Drop

If you ever need to manually install a HAR/JSON viewer extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the HAR/JSON viewer Extension by clicking the "Download CRX" button on the website.

Look for the HAR/JSON viewer extension you wish to install. Go to the website and download the HAR/JSON viewer extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for HAR/JSON viewer extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the HAR/JSON viewer extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download HAR/JSON viewer extension for Chrome and install in Developer Mode

This is another method to install HAR/JSON viewer extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the HAR/JSON viewer extension file

Select and download the HAR/JSON viewer extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the HAR/JSON viewer extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your HAR/JSON viewer extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the HAR/JSON viewer extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install HAR/JSON viewer extension in 2 ways. We hope this guide proves helpful.

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User reviews

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Tấn Lộc Võ (ID: 0000002704cc897a) Voted 5 ★ - Updated 08/08/2023 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

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Leonid Beilis (ID: 0000001ac2e55fff) Voted 5 ★ - Updated 05/09/2023 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.

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Kevin Brannen (ID: 00000013021edba0) Voted 1 ★ - Updated 08/04/2022 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.

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Sergey Maksimov (ID: 0000003467fbb1b3) Voted 5 ★ - Updated 07/20/2021 Nice extension, simple but powerful. Works with all JSONs, however it is most suitable for HAR files. Its visualization tool is amazing!