Questions

What the tools do, and what they will not claim.

Claude’s mark is a trail in the words. File credentials are bytes you can delete. A credit buys one of those jobs. Nothing here certifies a private detector, and nothing here proves human authorship.

Claude’s text watermark

Will a light edit remove it?
Usually not. Anthropic says light editing probably keeps the signal. Replacing every word does not — though at that point the text is no longer the original generation.
What about short text?
Fewer forks mean less evidence. Detection is weak on short samples and grows more confident as the passage lengthens.
What about code?
Code has fewer equally-good next tokens, so the mark is sparser. Comments and other arbitrary wording can still carry it; a required identifier cannot.
What if Claude only proofread?
The watermark only attaches to words Claude chose. Light grammar edits may be too few to register. Heavier rewriting leaves more of a trail.
Do translations carry it?
Yes. A translation produced by Claude is a sequence of words Claude chose, so the watermark has a full passage to live in.
Can it identify me?
No. Nothing in the watermark or its key points to a person, organisation, or chat. It tests whether Claude was involved, not who asked.
What about other models?
Other providers who signed the same EU Code of Practice will use their own keys, and possibly their own methods. A Claude check says nothing about them.
What does a hit prove?
That Claude was likely involved at some point. It cannot tell “Claude wrote this” from “Claude heavily edited this,” and it does not prove human authorship.
What about images and files?
Those get a C2PA content credential in metadata — a signed note, not SynthID-Text. The file cleaner can strip that label. Soft binding can survive and re-link to a remote manifest.

Files and Content Credentials

What does the cleaner remove from a photo?
EXIF (including GPS), XMP, C2PA manifests, and comments. ICC colour profiles stay, so colours do not shift. PNG, JPEG and WebP are stripped losslessly — the pixels are not re-encoded.
Does stripping C2PA prove an image was not AI-made?
No. Removing a signed note removes the note. It does not change how the pixels were made, and it does not prove human authorship.
What is C2PA soft binding?
A fingerprint that can re-link a file to a remote manifest after the embedded credential is gone. A metadata strip deletes the local label. It cannot promise the remote record is gone.
What happens to a PDF?
Document info and XMP are cleared, then the file is structurally rebuilt. Without that rebuild the old metadata stays recoverable in the bytes. PDFs go to a worker that can do that job properly.
What about Word and OpenDocument files?
Author and company fields, custom properties, revision-save IDs, comment authors, the page-one thumbnail, and metadata inside embedded images. The title is kept. The document body is not rewritten.
Which formats can Gifi clean?
PNG, JPEG, WebP, PDF, DOCX and ODT. A format we cannot fully clean is refused rather than half-stripped. Pixel-embedded image watermarks, audio and video are out of scope.

Plans and credits

What counts as a credit?
One file cleaned, or one rewrite candidate generated. Pasting on the home page costs nothing; continuing a rewrite spends credits.
What if a job fails?
The credit is refunded automatically. Failures cost you nothing.
Can I cancel?
Any time, from the billing portal. It takes effect at the end of the current period.

What Gifi cannot promise

Can Gifi certify that rewritten text will fail Anthropic’s detector?
No. SynthID-Text uses a private key. We cannot see it, and no third-party tool can honestly certify the result of a private detector.
Does a rewrite prove the text is human?
No. Changing the words changes the statistical trail. It does not mean the content was never AI-assisted, and it is not a substitute for a disclosure the law or a platform requires.
Do you remove watermarks baked into pixels, audio or video?
No. Pixel-embedded image watermarks are out of scope. Audio and video are not supported at all.