
JavaScript Operator Lookup
JavaScripting
Let's write robust, well-tested, modular JavaScript code.

Microphone Test Online
Gamepad Tester
KeyboardTester.click
EIZO Monitor Test
DeviceCheck HQ
CyberChef
HardwareTestingPro
CapyToolkit is a growing collection of free, privacy-first browser tools. Its hardware testers check gamepad drift, mouse polling rate, dead pixels, webcam and mic quality, speaker response, and MIDI latency, with no driver or install and no upload.
Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | mjavascript.com | capytoolkit.com |
| Pricing | ||
| Platforms | — | |
| Company | — | Startup from the United States · 1 - 9 employees |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Modular JavaScript yet.
CapyToolkit is a growing collection of free, privacy-first browser tools. Among its 50+ tools is a set of hardware testers for anyone who just bought a controller, a mouse, a monitor, or a microphone and wants to know it works as advertised. The gamepad tester shows stick drift and dead zones,...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
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Recommended for
No analysis of CapyToolkit yet.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Modular JavaScript and CapyToolkit. For example, how are they different and which one is better?
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Test the current state of a connected gamepad.
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