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

10015.io
Bitty Coder
CodeSwissKnife
ToolKitKE
devtoolz.dev
Code Beautify JSON Validator
FreeFormatter
Free online tools: JSON formatter, password generator, QR code maker, calculators, converters and more. Fast, private, no login — everything runs 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 | codekithub.com |
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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
More videos
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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 CodeKitHub.
CodeKitHub's answer:
CodeKitHub's answer:
Compared to single-purpose sites like JSONFormatter.org or CodeBeautify that only handle one task, CodeKitHub covers the same ground plus image, PDF, QR, and calculator tools in one place — useful if you regularly switch between different tool types during a workday.
Unlike FreeFormatter (which recently shut down its service), CodeKitHub's tools require no backend at all — everything runs as static, client-side JavaScript, so there's no server cost pressure driving ads, paywalls, or future shutdowns of the kind that killed similar sites.
If you need a tool site in a language other than English — Spanish, French, German, Japanese, Korean, Chinese, and others — CodeKitHub is one of the few free tool sites that actually localizes the full interface rather than just running it through machine translation on top of an English-only tool.
CodeKitHub's answer:
CodeKitHub serves two overlapping groups:
Traffic data shows both groups in practice: technical tools (QR generator/decoder, Base64 encoder, JSON tools) draw developer-heavy referral sources like Hacker News and ChatGPT, alongside broader organic search traffic for everyday utility tasks.
CodeKitHub's answer:
CodeKitHub started as a small set of browser-based developer utilities and grew into a 120+ tool collection covering JSON formatting, encoding, image/PDF processing, calculators and more. The core principle from the start was that every tool should run entirely client-side — no backend, no data leaving the user's browser — which keeps the tools fast, private, and cheap enough to run without ads getting in the way. The site has since expanded to 13 languages to serve users beyond English-speaking markets.
CodeKitHub's answer:
Share your experience with using one sec and CodeKitHub. 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 / 8 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 / over 1 year ago
Tracking CodeKitHub since Jul 2026.
When comparing one sec and CodeKitHub, you can also consider the following products.

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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10015.io is an all-in-one toolbox offering many tools from various categories.
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Real Focus in Real-Time. Measure and improve your focus day by day, on iPhone, iPad and macOS.
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Fast developer tools that process your input locally in your browser. No account required.
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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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Feature-packed developer toolkit. Includes text conversion, encoding, UUID generation, cryptography, color conversion, JSON/XML formatting, and more for simplified, efficient development tasks without online data transmission.
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