JaSON

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

What is JaSON?

"JaSON" is a free, open-source Chrome extension that acts as a simple HTTP client. It's perfect for testing and debugging a variety of APIs and web services. With automatic cookie support for handy authentication, a variety of HTTP methods, dark or light themes, and a history of previous requests, JaSON provides an easy, efficient experience. It also formats input/output and supports multiple content types, making it truly adaptable to a multitude of testing needs.

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Stats

By: Shane Bell

View on Chrome Web Store

Users: 8,000+

Rating: 4.35 (37)

Version: 5.0.25 (Last updated: 2021-04-23)

Creation date: 2020-06-28

Risk impact: Moderate risk impact

Risk likelihood: Very low risk likelihood

Manifest version: 2

Permissions:

http://*/*
https://*/*

Size: 1.89M

Email: sh*****@gmail.com

URLs: Website ,Privacy policy

Stats date:

Chrome-Stats Rank

# 11292 ▼ 38

Other rankings

#667 in Developer Tools

#138 in source code keyword 29 ▲ 47

#185 in performance keyword 11 ▲ 15

#211 in header keyword 45 ▲ 1

#233 in request keyword 26 ▲ 7

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Other platforms

Not available on Firefox

Not available on Edge

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Summary

Analyze keywords

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:

User reviews

User reviews summary

These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.

Pros

Ability to test API with HTTP POST requests and JSON responses
Remembers previous requests
Simple interface

Cons

Cannot make it work with creating JSON data
Doesn't work with XML
Could better format JSON response

Most mentioned

Good for JSON
UI
Doesn't work well with XML

Recent reviews

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!

Mark Pearson, 2022-12-15

I honestly love this extension <3

Gilbert Lopah, 2022-09-09

Just doing what he has to do.

Semen Orlov, 2022-04-29

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Safety

Risk impact

JaSON may not be safe to use and it requires some risky permissions. Exercise caution when installing this extension. Review carefully before installing.