
JSONFormatter.org
JSON Formatter & Validator
JSON Editor Online
FreeFormatter
Code Beautify JSON Validator
CodeBeautify
DevToys
JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.

HardwareTest.org
Keyboard Tester Pro
Device-Test
RigPolice
gamepadtest.tech
HardwareTestingPro
DeviceCheck HQ
Test your mouse, keyboard, and audio hardware right in the browser. 100% free, no download required.

Which is more popular?
Based on our record, JSONLint seems to be more popular. It has been mentioned 138 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | jsonlint.com | setuptester.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of JSONLint yet.
SetupTester is a lightweight, 100% free web utility designed to help gamers and professionals instantly diagnose hardware issues without downloading sketchy third-party software. Built entirely with vanilla JavaScript for zero-latency testing, the suite includes: Mouse Double-Click Tester:...
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
Why this product is good
Recommended for
No analysis of SetupTester yet.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing JSONLint and SetupTester.
SetupTester's answer:
SetupTester is a lightweight, 100% free web utility designed to help gamers and professionals instantly diagnose hardware issues without downloading sketchy third-party software.
SetupTester's answer:
Lightning fast and free.
Share your experience with using JSONLint and SetupTester. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I've been maintaining jsonlint.com for years. It's a simple JSON validator that I enjoy hacking on every now and then. Nothing fancy, just a useful tool that developers seem to appreciate. - Source: dev.to / 8 months ago
Note: It is crucial that your batchinput.jsonl file is correctly formatted. You can use online JSON formatters and validators like jsonformatter.org or jsonlint.com to verify its integrity before proceeding. - Source: dev.to / about 1 year ago
Online Tools: Websites like JSONLint or jsonformatter.org let you paste JSON and get a minified version instantly. - Source: dev.to / about 1 year ago
Tracking SetupTester since Aug 2026.
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Free Online Keyboard Testing Tool
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Privacy-first device tests for microphones, cameras, screens, speakers, sensors, and more — right in your browser.
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