About DevBox Tools

Why this exists

The tools on this site — regex, cron, JSON — are the ones you reach for a few times a week and never think about in between. The usual experience is four bookmarks to four single-purpose sites, each with its own cookie wall, its own ad density, and at least one of them asking you to disable your ad-blocker before it will show you a text box.

Several of them also upload what you paste. For formatting three lines of JSON, that is an odd trade to be asked to make — particularly when the JSON came out of a production system.

DevBox Tools is the version I wanted: one place, fast, mobile-usable, with the processing happening in the tab and a real explanation underneath the result.

Everything runs in your browser

This is not a policy commitment that could quietly change — it is how the site is built. There is no backend, no database, and no API route that accepts your input. The regex engine is your browser’s. The JSON parser is your browser’s. The cron logic is JavaScript that was sent to you along with the page.

You can verify it: open your browser’s network tab and use any tool on the site, or load a tool and then disconnect from the network. Everything keeps working.

Explanations, not just output

A regex that matches your test string is not the same as a regex you understand well enough to put into production. A cron expression that parses is not the same as one that runs when you think it does. So every tool here translates its input back into English — “runs at 09:00 on Monday”, “one or more digits, captured as group 1” — and shows you the consequences before you commit them.

Underneath each tool is a reference section covering the syntax it uses, and where relevant, where the major implementations disagree. Those pages exist because the questions come up, not because the phrases have search volume.

How the site is funded

Advertising, through Google AdSense — but only if you agree to it. Ads are off by default. If you decline, or if you run an ad-blocker, everything still works and you will not be nagged about it. There are no accounts, no paid tier, no feature held back, and no upload limits.

Where ads do appear, they sit below the tool and its result, or between sections of long-form content — never inside the tool, never between an input and its output, and never styled to resemble a button or a download link. The full placement policy is in the privacy policy.

What is coming

A JWT decoder, a UUID generator, hash generators, and Base64 and URL encoders are next, followed by saved snippets stored locally in your browser. Each will get the same treatment as the current tools rather than being shipped as a thin page to fill out a menu.

Corrections

If a tool gives a wrong answer or an explanation is misleading, that is worth more to me than a feature request. Tell me about it and I will fix it.