Skip to content
AI Origin CheckRun a free check

Unicode inspection

Hidden Character Checker & Safe Text Cleaner

Reveal invisible or control characters in pasted text, understand what each one does, and clean only the categories you choose.

0 characters0 words
Text watermark limitation

Claude’s described statistical watermark is not made from hidden Unicode characters. Until an official detection mechanism is released, this scanner reports only directly observable characters and artifacts.

Your text stays in this tab. No text, findings, or cleaned output is stored or transmitted.

Invisible does not mean malicious

A zero-width joiner creates emoji sequences and affects scripts such as Arabic and Indic. Directional isolates help mixed left-to-right and right-to-left text render safely. Non-breaking spaces preserve typography.

The report flags these characters for inspection rather than blindly deleting them. Safe mode removes only common transport or discretionary formatting artifacts.

Useful checks before publishing

Hidden controls can cause confusing cursor movement, unexpected search mismatches, source-code review problems, or layout differences. Review the listed positions in context and keep characters needed by the language.

Primary sources and further reading

For technical and policy detail, consult the C2PA specification, Content Authenticity Initiative developer documentation, Anthropic transparency material, Google DeepMind’s SynthID overview, and the European Commission’s AI transparency guidance.