
CyberChef
IT Tools
10015.io
CodeSwissKnife
JSONFormatter.org
JSONLint
A.Tools
A collection of converters, formaters, encoders, generators and other tools for your Windows desktop.

Detectify
UptimeRobot
Mozilla Observatory
Reeve.page
SimpleBackups
Snyk
Intruder
AppSitter connects to your GitHub repo and checks what nobody can see from outside: row-level security across every migration, keys shipped in the bundle, dependency advisories, email DNS. Every finding comes back as a prompt for your builder.

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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| Website | devtoys.app | appsitter.app |
| Pricing | ||
| Platforms | — | |
| Company | — | Startup from Germany · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of DevToys yet.
AI builders let anyone ship a real app. Nothing in that workflow tells you when the app is leaking data, or quietly running up a database bill. AppSitter is the watch service for exactly that gap. FREE URL SCAN, NO ACCOUNT Paste your live URL and see what the outside world can already see: API...
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 AppSitter yet.
Walkthroughs and reviews on video.
DevToys - Review and How to Install | The Swiss Army Knife for Developers
More videos
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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 AppSitter. 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 AppSitter since Aug 2026.
When comparing DevToys and AppSitter, you can also consider the following products.


Detectify provides a user friendly and thorough web security scan that allows you to focus 100% on web development.
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IT Tools is a free and open-source collection of handy online tools for developers & people working in IT.
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10015.io is an all-in-one toolbox offering many tools from various categories.
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The Mozilla Observatory is a project designed to help developers, system administrators, and security professionals configure their sites safely and securely.
Compare Mozilla Observatory to DevToys or AppSitter: