About Invisible Character Detector

Invisible Character Detector is a small, free, single-purpose web tool that finds and removes hidden Unicode characters in text. It was built and is maintained by Marcio out of a recurring frustration shared across developer, writing and data communities: text that looks perfectly normal but quietly breaks code, search, spreadsheets and forms because of characters you cannot see.

The detector runs entirely in your browser. There is no account, no upload and no server-side processing — the scanning and clean-up happen locally in JavaScript on your own device. That makes it fast, private and usable offline once the page has loaded.

What we aim for

Accuracy and honesty. The tool reports exactly which characters are present and names them using their official Unicode designations. Where a topic is genuinely uncertain — such as whether particular characters prove that text was machine-generated — we say so plainly rather than overclaiming. You can read our reasoning in the field guide.

Feedback

If you spot a character the detector misses, or have an idea for an improvement, we would like to hear it. Please get in touch via the contact page.