Paste
Paste formatted or plain text into the tool.
What is an AI text watermark?
The phrase is often used for invisible characters in copied text, including zero-width spaces, joiners, byte-order marks, soft hyphens, and direction controls. These can also come from editors, websites, document conversions, or other software. Their presence does not prove AI authorship.
Important scope:
UnmarkAI removes supported character-level artifacts. It does not detect authorship or defeat statistical systems such as SynthID.
How to clean supported artifacts
Inspect
See which supported character categories were found.
Review
Check punctuation and copy the cleaned result.
What UnmarkAI checks
- Zero-width spaces, joiners, word joiners, and byte-order marks
- Bidirectional and text-direction controls
- Soft hyphens and variation selectors
- En and em dashes, normalized to a standard hyphen
Frequently asked questions
What can the remover clean?
It cleans the supported Unicode groups above and can normalize long dashes.
Can it remove SynthID?
No. It does not remove provider-specific statistical watermarks.
Is it free?
Yes. There is no account, subscription, paywall, or daily character quota.