Finds artifacts and long dashes
Checks zero-width characters, direction controls, soft hyphens, variation selectors, em dashes, and en dashes.
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Ready to inspect
Paste text to check for hidden characters.
01Paste formatted text
0 characters
02Clean formatted output
Safe formatting preserved0 characters
Visual change report
Hover or click a highlighted character for details.
WHAT IT DOESA careful check,
A careful check,
not a magic verdict.
Cleans without rewriting
Hidden artifacts are removed and long dashes become standard hyphens. Your wording and safe formatting remain intact.
Stays on your device
Analysis happens locally in your browser. There is no server processing or saved text.
Remove supported AI text watermark artifacts for free
UnmarkAI is a free browser-based cleaner for invisible Unicode characters and selected punctuation artifacts found in copied text. There is no account requirement, paid upgrade, or daily character quota for the cleaner. Your text stays on your device.
1. Paste formatted text
Paste plain or rich text from ChatGPT, Claude, Gemini, a document, or another editor. Common safe formatting is retained.
2. Inspect hidden characters
The tool checks for zero-width characters, bidirectional controls, soft hyphens, variation selectors, and long dashes.
3. Review and copy
Review the cleaned result, then copy it as plain text or formatted text. Always check punctuation before publishing.
Frequently asked questions
Is UnmarkAI really free?
Yes. The text cleaner has no account requirement, subscription, paid tier, or daily character quota. Optional donations support the project but do not unlock features.
What does this remover clean?
It removes selected hidden Unicode artifacts and normalizes en and em dashes. These characters are not proof that text was generated by AI.
Is this an AI detector?
No. UnmarkAI cleans supported text artifacts and does not determine authorship.
Can it remove SynthID or every AI watermark?
No. Provider-specific statistical watermarking is outside this tool's scope. UnmarkAI only cleans the supported text characters listed above.
Is my text uploaded or stored?
No. Inspection and cleaning run locally in your browser. Optional analytics never include pasted or cleaned text.
Will it rewrite my content?
No. It targets supported characters rather than rewriting sentences. Long-dash normalization can change punctuation, so review the result.