Runs locally · No uploads

Clean every trace Gemini
leaves on your images.

Unstamp reverses the visible star Gemini stamps in the bottom-right and strips the invisible metadata (C2PA, EXIF, XMP) — all in your browser, no uploads. The math is exact, not an AI guess.

Drop, click, or paste

Up to 10 files · PNG, JPG, WebP · Paste with Ctrl/⌘V

No file selected
What

Closed-form inverse, not a guess.

Gemini blends a white star into the bottom-right corner at a fixed, known opacity α:

watermarked = α · logo + (1 − α) · original

Because α is known, the inverse solves exactly:

original = (watermarked − α · logo) / (1 − α)

The image never leaves your browser.

How

Three steps.

  1. 1
    Download the original from Gemini. Use the download-arrow icon in Gemini's image toolbar — not a screenshot or "save image as".
  2. 2
    Drop, pick, or paste. Up to ten PNG, JPG, or WebP files at once. Unstamp auto-detects the 48×48 or 96×96 watermark size.
  3. 3
    Download clean files. Star reversed, metadata gone. Individually or zipped together.

Notes & limitations

What happens to metadata

Invisible metadata — EXIF, XMP, and the C2PA "Made with AI" credential — is removed automatically. Re-encoding the image produces a clean file with only the pixels, no metadata boxes.

SynthID can't be cleanly removed

Google's SynthID is a pixel-level signal, not metadata. Removing it cleanly would require the original unwatermarked pixels (which we don't have) or AI-based reconstruction (which we don't do). Heavier compression weakens it but doesn't guarantee removal.

Cropped or re-compressed images will degrade

If an image has been modified after Gemini generated it, the watermark position or alpha may no longer match the known map and results will be imperfect. Always start from the original Gemini download.

Canvas-fingerprint extensions block processing

Some privacy extensions refuse getImageData. If you hit a processing error, disable those extensions for this page and retry.