Loadmill Test Composer icon

Loadmill Test Composer

by Loadmill LTD · loadmill.com · Developer Tools
Established publisherManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Generate API Tests using AI

Users
790
+4 in 30 days
Rating
4.6 / 5
unchanged in 30 days
Ratings
9
0 in 30 days
Store rank
#35K
#30K among extensions
Version
0.35
updated 13 Mar 2026

Users

monthly, 3 years
2006001,000Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 790 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
269Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 9 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Loadmill Test Composer

Loadmill Test Composer uses AI to generate automated API tests in real-time, right from your browser. Spend less time creating boilerplate and repetitive test code and more time adding your own insights to your tests. Play a user flow in your app, and Loadmill Test Composer will generate an end-to-end API test script from the API traffic observed in your browser. How to use Loadmill Test Composer to generate an end-to-end API test: ➤ Click the Loadmill extension icon in Chrome to open the Loadmill side panel ➤ If you are not logged in to Loadmill, you will be prompted to sign in ➤ Click Start and play the user flow you would like to test ➤ Let Loadmill analyze the API requests observed during the flow ➤ When you are done, click Create Test at the bottom Note for existing users: Loadmill Test Composer has moved from the Chrome Developer Tools tab to the Chrome side panel. ★ What's new • Side panel migration: Loadmill Test Composer now opens in Chrome's side panel instead of a DevTools tab • Updated side panel flow, including better behavior on tab switch, resume, and panel close • Improved side panel layout and tooltip behavior when zooming out • Added support for split incognito mode ★ Supported features • Auto Analyze Mode: Tests can now analyzed and filtered automatically as you record. • Added an option to revert the AI analysis • Support for multiple recording profiles (Using different processing algorithms for each) • Better support for multi-systems testing. Upload HARs to combine recordings from multiple applications into a single test flow • Test analysis will now use your account algorithm settings • Improving the ability to hide and obfuscate sensitive values • No longer clearing the request list after test creation • Updated UI visuals and Layout • Adding automated API descriptions • Filter irrelevant requests from your session in one click • View WebSocket binary messages in clear text • WebSocket! WebSocket events are now included in the generated tests. • Syntax highlighting for JSON • Showing the request and response body • Better control on which requests will be filtered out • Copy a single request and paste it into your Loadmill tests • Better support for base64 encoded responses • Create a new test suite by typing its name in the test suite selector bar

Growth

WindowUsersChangeRatingsRating
7 days−3−0.4%00.00
30 days+4+0.5%00.00
6 months−193−19.6%00.00
1 year−210−21.0%00.00

Chrome Web Store search rankings

Where Loadmill Test Composer appears when people search the store, with the 30 day change
Search phrasePosition30 days
testing#80+19

Version history

25 versions recorded
0.3513 Mar 2026
0.346 Oct 2025
0.3315 Jul 2025
0.325 Jul 2025
0.3124 May 2024
0.306 Feb 2024
0.2820 Jul 2023
0.2719 Jul 2023

Details

Category
Developer Tools
First seen
14 Feb 2020
Size
1.8 MB
Languages
en
Pricing
Free
Privacy policy
app.loadmill.com
Support
docs.loadmill.com
Extension ID
gdkmnfehipofdefhpegbgkkocinlaofd

Permissions and risk

Moderate riskimpact 4, likelihood 1
Permissions
clipboardWritestoragetabswebRequestdebuggersidePanel
Site access
ws://*/*wss://*/*<all_urls>
Can read and change data on every website you visit.

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