
HardwareTestingPro
Keyboard Checker
TestHub360
Keyboard Tester Pro
DeviceMetrik
MicTest.work
SetupTester
Privacy-first device tests for microphones, cameras, screens, speakers, sensors, and more — right in your browser.
Dadroit JSON Viewer
Jayson
ExtendsClass JSON Generator
MockTurtle.net
Fullstack Vue
Mockaroo
DevToys
Create mock and sample JSON using a powerful template syntax

Which is more popular?
Based on our record, JSON Generator seems to be more popular. It has been mentioned 9 times since March 2021.
Website, pricing, platforms and company facts side by side.
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JSON Generator
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| Website | device-test.com | json-generator.com |
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What each product offers, as listed by its team.

Possible disadvantages
Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Device-Test and JSON Generator. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking Device-Test since Aug 2026.
JSON Generator: also generates mock data, but for JSON specifically. It's a bit more complex, but it allows for tailor-made results. - Source: dev.to / almost 3 years ago
Is there a generator for all the JSON generators out there? https://json-generator.com/. - Source: Hacker News / about 3 years ago
So I generated a random JSON file and tried parsing it. It doesn’t error, but whenever I do a println(root.Object().Value().String()), I get a panic: wrong type. If I do a println(root.Object().Present()), it prints false. So seems like... Source: over 3 years ago
When comparing Device-Test and JSON Generator, you can also consider the following products.

Test your keyboard, mouse, monitor, microphone, camera, and gamepad instantly in your browser. 77+ free hardware diagnostic tools - no installs & no accounts.
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Open a 1GB JSON file in a blink 💣
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Simple browser tool to check if all your keys work properly
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Test your microphone, keyboard, webcam, speakers, mouse, and click speed online — free, instant, private. 8 browser-based tools. No downloads. No account.
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ExtendsClass's JSON generator allows to generate random JSON data from a template.
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