
Opal.so
Freedom.to
Cold Turkey
Forest App
clearspace
FocusMe
LeechBlock
one sec uses Shortcut automation in order to empower you to spend more time in the real world.

OneCompiler
JDoodle
Programiz
IT Tools
CodeBeautify
CyberChef
JSONFormatter.org
Online compilers and developer tools that run in your browser

Which is more popular?
Based on our record, one sec seems to be more popular. It has been mentioned 44 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | one-sec.app | devtoolry.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from India · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of one sec yet.
Devtoolry is a free collection of 120+ developer tools that run in the browser. No signup, and almost everything is processed locally, so your code and files stay on your machine. Online compilers: C and C++ (Clang), Go (the real Go toolchain), Python, PHP, Ruby and R, all running client-side via...
What each product offers, as listed by its team.


Possible disadvantages
Walkthroughs and reviews on video.
The app that makes Elon Musk cry — One Sec app setup & review
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing one sec and Devtoolry.
Devtoolry's answer:
Developers and computer science students who need to quickly run a snippet, format or validate data, compare text or convert files without installing anything, and anyone who prefers that their code and documents stay on their own device.
Devtoolry's answer:
Most online compilers and converters upload your code or files to their servers and often ask you to sign up. Devtoolry processes everything locally in the browser, needs no account, and keeps compilers, JSON and text tools, PDF and image tools, generators and time tools in one consistent interface with dark mode and keyboard-friendly editors.
Devtoolry's answer:
I'm a solo developer from India. I kept switching between a dozen different sites to format JSON, run a quick C program or compress a PDF, and many of them uploaded my files or were full of pop-ups. I built Devtoolry as one clean place for these everyday tasks, with everything running in the browser.
Devtoolry's answer:
Everything runs in your browser. The online compilers don't send code to a server: C and C++ are compiled with Clang to WebAssembly, Go uses the real Go toolchain targeting wasip1, and Python, PHP, Ruby and R run in Web Workers. The same applies to the PDF and image tools, so files are never uploaded. It is also one site with 120+ tools instead of a separate site for each task.
Devtoolry's answer:
Next.js, React, TypeScript and Tailwind CSS, with CodeMirror for the editors. In-browser runtimes: Clang compiled to WebAssembly, the Go toolchain on WASI, Pyodide (Python), php-wasm, ruby.wasm, webR and sql.js, all running in Web Workers. PDF tools use pdf.js, pdf-lib and qpdf compiled to WebAssembly; the background remover runs ONNX models with onnxruntime-web.
Share your experience with using one sec and Devtoolry. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I think most users need more screen blocking control than they get out of the box on iOS. Ntools like one sec [1] have been invaluable for me. [1]: https://one-sec.app/. - Source: Hacker News / 9 months ago
One thing that finally worked for me was using: https://one-sec.app/ It basically forces you to do a little breathing exercise before you can visit the site that you have on its block list. It has been life changing. It adds enough... - Source: Hacker News / over 1 year ago
I've tried various forms of this. As long as there's a logged in session somewhere, I have to have various tricks and extensions on my browser to manage things. Most have been only varying degrees of successful, often ending up in me... - Source: Hacker News / almost 2 years ago
Tracking Devtoolry since Oct 2026.
When comparing one sec and Devtoolry, you can also consider the following products.

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Freedom is a productivity hack that lets you block apps, websites or the entire Internet on iPhones, iPads, Windows and Mac computers.
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JDoodle is a free online compiler app that is serving programming communities to compile and run programs from mobile devices.
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Cold Turkey is a free productivity program that you can use to temporarily block distractions so that you can get your work done!
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Free e-learning platform for programming beginners.
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