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564+ free online tools that run entirely in your browser. No signup, no uploads.

Which is more popular?
Based on our record, DevToys seems to be more popular. It has been mentioned 16 times since March 2021.
Website, pricing, platforms and company facts side by side.
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UT
U2Tool
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| Website | devtoys.app | u2tool.com |
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In their own words, as submitted to SaaSHub.

No description of DevToys yet.
U2Tool is a collection of 564+ free online tools that run entirely in your browser — no signup, no uploads, no installation. All processing happens locally on your device. Tool families include: Developer tools: JSON formatter and validator, JWT decoder, regex tester, SQL formatter, API tester,...
What each product offers, as listed by its team.

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

Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
DevToys - Review and How to Install | The Swiss Army Knife for Developers
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using DevToys and U2Tool. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

There are lots of these, but this is the first that I've seen that focused on frontend dev a bit more. I've saved it to my list of tools for reference. Here's another with a more local / backend / IT flavor: https://it-tools.tech I have... - Source: Hacker News / 10 months ago
Think of DevToys as the developer equivalent of a multi-tool. It’s a desktop app with dozens of handy utilities. - Source: dev.to / about 1 year ago
Devtoys is great and open-source and .NET and cross-platform * https://devtoys.app/ and in context to the thread files-community/files is great and open-source and .NET and cross-platform * https://files.community/. - Source: Hacker News / almost 2 years ago
Tracking U2Tool since Mar 2026.
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