Nearby tools from the catalog that fit the same job or workflow.
Developer
Build a cron expression from fields and presets, or paste one to read a plain-English explanation. Free, in your browser, nothing is uploaded.
Developer
Evaluate XPath expressions against XML and view matched nodes instantly. Free, in your browser, nothing is uploaded.
Test JS regex locally
Test one JavaScript regex pattern against pasted text and inspect matches and groups locally.
Developer
Generate a scannable Code 128 barcode as inline SVG from any text or number. Free, in your browser, nothing is uploaded.
Developer
Turn a code snippet into a polished PNG screenshot with window chrome and a gradient background. Free, in your browser, nothing is uploaded.
Developer
Create shields.io-style status badges with custom label, message, and colors. Free, in your browser, nothing is uploaded.
Everyone can see the current score. Signed-in users can leave a 1 to 5 star rating, and any written review goes only to review@cleanor.app.
No ratings yet. Be the first to leave one.
Sign in to leave a public score from 1 to 5 stars. Optional written feedback is private and emailed only to review@cleanor.app.
This block mirrors the system review flow: score first, then an optional private note.
A quick way to understand who this helps, what it solves, and where it connects next.
Developers writing and debugging regular expressions.
Using the regex tester without installing anything or signing up.
Capture regex-tester intent with a fast, browser-side tool that runs 100% locally.
Cleanor Labs
These sections explain the job in plain language and set expectations for what the tool should do well.
The regex tester lets you build and debug regular expressions without leaving the page. Type a pattern, flip the flags you need, and paste any test string to see every match highlighted instantly, along with a detailed list of capture groups, named groups, and character indices. Invalid patterns show a clear error instead of breaking, and quick-insert buttons drop in common patterns like email, URL, and IPv4 to get you started. Everything is evaluated locally with the browser's native regular expression engine, so your patterns and test data never leave your machine.
Short answers for the questions people usually have before trying a utility like this.
You can toggle g (global), i (ignore case), m (multiline), s (dotAll), u (unicode), and y (sticky). The active flags are applied live to every match as you change them.
Yes. Each match lists its numbered capture groups, any named groups, and the start and end character indices, so you can see exactly what the pattern captured.
No. All matching runs locally in your browser using the native RegExp engine. Nothing is uploaded and no data leaves your device.
Every tool on Cleanor is free with no sign-up, no credits, and no limits. Files are processed privately in your browser. Looking for on-device phone cleanup and Premium features? That lives in the Cleanor app.
Build a pattern, pick flags, and see every match highlighted live with capture groups and indices. Everything runs in your browser.
Evaluated locally in your browser.