The Gemini star, SynthID and Content Credentials
A visible corner mark, an invisible watermark and signed provenance describe different things. Editing the star is not proof that every AI signal is gone.
Open the free image tool ↗Three different kinds of information
| Mark or record | What it is | WatermarkLift’s scope |
|---|---|---|
| Visible Gemini star | A sparkle overlay you can see in the image, commonly near the bottom-right corner. | Attempts to clean supported known overlays, with conservative checks and an original-file fallback. |
| SynthID | Google’s imperceptible digital watermark embedded in AI-generated content and detected with its technology. | No dedicated removal, detection or verification. Editing may affect signals; preservation is not guaranteed. |
| C2PA / Content Credentials | Cryptographically verifiable provenance records that can describe a file’s source and editing history. | No signature validation or provenance recreation. Edited PNGs may omit source metadata; the exact original stays available. |
Not every file carries the same records. A visible star is not an authenticity test, and the absence of one does not establish that the image was made without AI.
What visible watermark removal actually means
WatermarkLift checks for a known bottom-right overlay and uses inverse alpha blending to estimate the covered pixels. It does not use generative fill or an external model. If the match is uncertain or a quality check fails, the original is kept.
This is a narrow image-editing operation. It is not a general watermark remover, an AI detector or a method of certifying an image’s origin. A Cleaned · review result still needs visual inspection, and exact restoration is not guaranteed.
Google describes SynthID as a signal embedded directly into generated content and designed to withstand various modifications. Its behavior is separate from the visible star. WatermarkLift has not comprehensively tested SynthID before and after processing, so it makes no claim that the signal is always retained or always removed.
Why you should keep the original file
The cleaned download is a newly encoded, edited PNG. Pixels, file bytes and metadata can differ from the input. Source Content Credentials may not be retained; WatermarkLift does not copy, recreate or sign provenance records for its output.
The presence of a metadata container alone does not cause WatermarkLift to reject an image. Its processing decision depends on the supported input, visible overlay evidence and quality checks. That decision says nothing about whether a provenance signature is valid.
If you need source records, preserve the unedited file using Download original. Use an appropriate verification tool for any authenticity question. Retaining the original preserves the input bytes; it does not by itself validate the file’s history.
Does turning off Gemini’s visible watermark turn off SynthID?
Google’s Media Watermark help states that its visible-watermark setting does not affect SynthID or Content Credentials. The setting applies to new generations and its availability can depend on region and subscription. Consult the official help for your account.
Edit responsibly and describe the result accurately
Use only images you own or have permission to modify. Removing a visible mark does not grant ownership or permission. When sharing AI-generated or edited media, follow the relevant platform’s requirements and avoid representing an edited export as an unmodified, non-AI original.
For the actual import, review and download steps, read how to remove a Gemini watermark.
Official sources and further reading
Sources checked on October 9, 2026. Product settings and verification options can change.
- Google Gemini: Manage watermark settings ↗ — visible-watermark setting, availability and its separation from provenance signals.
- Google DeepMind: SynthID ↗ — imperceptible watermarking and identification.
- C2PA specifications ↗ — standards for verifiable media provenance.