GPT Watermarker

It has to handle all three layers Gemini applies, because each is embedded differently: the visible sparkle logo (removed in the browser with reverse alpha blending), the C2PA metadata manifest in the file header, and the invisible SynthID frequency watermark in the pixels (both cleaned server-side). A remover that only strips metadata leaves the SynthID signal sitting in the pixels — this tool clears all three in one place.

Choose 'Remove physical watermark' and upload your Gemini image. The logo is removed in your browser with reverse alpha blending, which mathematically reconstructs the pixels under the sparkle — no blur, no inpainting, no quality loss. It's instant and free up to your daily allowance.

Choose 'Remove hidden watermark' and upload your image. SynthID is encoded into the pixel frequency values, so it cannot be removed in a browser or by re-saving as JPEG — it is engineered to survive that. We process it server-side and return a clean file via a signed download link. It uses credits, charged only on success.

Run both modes. First remove the visible sparkle logo (instant, free, in your browser), then remove the hidden watermark on the result to neutralize SynthID and strip the C2PA manifest. After that the image is clean both to the human eye and to the automated systems that read AI provenance.

No. SynthID is engineered to survive cropping, resizing, screenshots, colour adjustments, format conversion, and JPEG re-compression at standard quality — it lives in the pixel frequencies, so ordinary edits don't touch it. The C2PA manifest sits in the file header and a screenshot or re-save may drop it by accident, but that's not reliable, and the visible sparkle stays put. Removing each layer requires the specific method that targets it.

Removing watermarks from images you generated yourself is legal in most places — common uses are cleaning your own work for a deck, portfolio, or client deliverable, plus backups, research, and verification. You should still follow any AI-content labelling rules that apply to you (for example the EU AI Act). Don't strip provenance from images you don't own or to misrepresent authorship.

Logo removal uses reverse alpha blending to mathematically reconstruct the original pixels, so there is no change outside the watermark area, and C2PA removal only discards header metadata. SynthID removal is different: it processes the picture itself, and in Standard mode the image is resized to 1024px on its longest edge. HD mode works up to 4096px. Use HD if you need the resolution.

Nano Banana 2 is Google's name for the Gemini 3.1 Flash Image model. Like every Gemini image model it applies all three watermark layers — the sparkle logo, C2PA metadata, and SynthID — so the same Gemini removal workflow applies to Nano Banana 2, Nano Banana Pro, and Google ImageFX exports.

Yes — sign in first. Free accounts receive two regular removals per UTC day shared across image and video logo or metadata cleanup. Paid plans make regular removals unlimited. SynthID image removal uses credits: 1 in Standard mode or 2 in HD.

Yes — use the Gemini Video Watermark Remover for the visible Gemini/Veo logo and hidden watermark on video. Switch with the Image/Video toggle. This page handles Gemini still images.