A simple, easy to use HTTP client to send API requests from within Chrome and see formatted, syntax highlighted responses.

Latest Version

Version
5.0.25
Update
April 23, 2021
Size
1.8MiB
Developer
Category
Users
8,000+
Rating
4.36842 ★
Manifest Version
2
Web Store Status
Languages Support
English (United States)
See more
Permissions
Http://*/*
Https://*/*
See more

JaSON Extension

Great for testing and debugging JSON and XML APIs, RESTful APIs, GraphQL APIs, web services, web applications and more.

Cookie support:
Automatically sends cookies from Chrome. This is extremely handy for APIs which require authentication. Simply authenticate via your browser as normal and JaSON will send cookies for requests which match.

HTTP methods:
GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS

Dark/light theme:
Change the colour theme to suit your work environment.

Request history:
Keeps request history with full text search. Individual history items can be deleted, or marked as a \"favourite\" for easy access. History from previous versions of JaSON will be automatically migrated. Stores history in IndexedDB for improved performance.

Formatted input/output:
Provides an IDE like experience when editing request body and headers. Automatically formats request/response body syntax and colour based on content type.

Content type:
Supports JSON, XML, and form encoded data by default. Additional content types can be used by setting a custom content type header.

New and improved:
Completely re-written, new styling, layout, colours, additional features and improved performance.

100% open source
Source code is available from GitHub.

Privacy policy
https://github.com/shanebell/JaSON/blob/master/privacy-policy.md
Read more

Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "name": "JaSON", "version": "5.0.25", "manifest_version": 2, "description": "A simple, easy to use HTTP client to send API requests from within Chrome and see formatted, syntax highlighted responses.", "background": { "scripts": ["background.js"], "persistent": false }, "browser_action": { "default_title": "JaSON", "default_icon": { "128": "jason-128x128.png", "256": "jason-256x256.png", "512": "jason-256x256.png" } }, "icons": { "128": "jason-128x128.png", "256": "jason-256x256.png", "512": "jason-256x256.png" }, "permissions": [ "http://*/*", "https://*/*" ]}
Read more

How to download and manually install JaSON extension for Chrome

Looking for a way to install JaSON 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 JaSON extensions manually, this article outlines two simple methods to effortlessly install JaSON extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download JaSON extension and manually install through Drag &Drop

If you ever need to manually install a JaSON 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 JaSON Extension by clicking the "Download CRX" button on the website.

Look for the JaSON extension you wish to install. Go to the website and download the JaSON extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for JaSON 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 JaSON 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 JaSON extension for Chrome and install in Developer Mode

This is another method to install JaSON 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 JaSON extension file

Select and download the JaSON 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 JaSON 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 JaSON 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 JaSON 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 JaSON extension in 2 ways. We hope this guide proves helpful.

Similar Extensions

icon

JSON Finder Extension · Developer Tools 8,000+ 20 ★ 72.77KiB

icon

JSON Viewer Extension · Developer Tools 8,000+ 1082 ★ 310KiB

icon

JSONVue Extension · Developer Tools 8,000+ 2651 ★ 181KiB

icon

XML Tree Extension · Developer Tools 8,000+ 555 ★ 422KiB

icon

AngularJS Console Extension · Developer Tools 8,000+ 6 ★ 263KiB

icon

Postman Interceptor Extension · Developer Tools 8,000+ 957 ★ 478KiB

icon

JSON-handle Extension · Developer Tools 8,000+ 450 ★ 193KiB

icon

HTTP Header Spy Extension · Developer Tools 8,000+ 62 ★ 149KiB

icon

Talend API Tester - Free Edition Extension · Developer Tools 8,000+ 4243 ★ 5.09MiB

icon

Codeanywhere Extension · Developer Tools 8,000+ 199 ★ 626KiB

icon

jQuery Debugger Extension · Developer Tools 8,000+ 110 ★ 88.52KiB

icon

Code Formatter Extension · Developer Tools 8,000+ 35 ★ 5.9MiB

icon

Boomerang - SOAP & REST Client Extension · Developer Tools 8,000+ 1023 ★ 549KiB

icon

Swoosh Cookie and Local Storage Specialist Extension · Developer Tools 8,000+ 121 ★ 720KiB

icon

Git Cheat Sheet Extension · Developer Tools 8,000+ 23 ★ 14.06KiB

icon

Wizdler Extension · Developer Tools 8,000+ 436 ★ 285KiB

icon

Request Maker Extension · Developer Tools 8,000+ 184 ★ 138KiB

icon

Bootstrap Twitter Offline Docs Extension · Developer Tools 8,000+ 90 ★ 3.11MiB

icon

OctoLinker Extension · Developer Tools 8,000+ 110 ★ 184KiB

icon

DevTools Theme: Zero Dark Matrix Extension · Developer Tools 8,000+ 545 ★ 56.82KiB

icon

XHR JSON Panel Extension · Developer Tools 8,000+ 18 ★ 45.82KiB

icon

OOXML Tools Extension · Developer Tools 8,000+ 35 ★ 1.98MiB

icon

JScript tricks Extension · Developer Tools 8,000+ 50 ★ 340KiB

icon

Code Cola Extension · Developer Tools 8,000+ 188 ★ 189KiB

User reviews

icon

Mark Pearson (ID: 000000961f493468) Voted 5 ★ - Updated 12/15/2022 This extension provided exactly what I was looking for - the ability to test an API which responds to HTTP POST requests with JSON responses. One feature I love is that it remembers previous requests which makes it very easy to fire off an earlier request again or change the JSON body of the request and then do the same. Excellent!

icon

Gilbert Lopah (ID: 0000005e10235855) Voted 5 ★ - Updated 09/09/2022 I honestly love this extension <3

icon

Semen Orlov (ID: 000000d618ddfe83) Voted 5 ★ - Updated 04/29/2022 Just doing what he has to do.

icon

Chan Go (ID: 0000000a8c1cfb8b) Voted 5 ★ - Updated 02/08/2018 Genial

icon

Developer C C (ID: 00000000d16b6f92) Voted 5 ★ - Updated 02/08/2018 Altamente recomendable