Claim your work
Invisible Watermark
Embed a short invisible claim of ownership that survives re-compression, and verify it later.
Drop an image here
JPEG, PNG or WebP · Up to 25 MB
How it works
Useful privacy, without privacy theater.
The mark lives in the image data itself, spread redundantly across the picture, so it does not disappear the way metadata does when a platform re-encodes an upload. Its tested limits are stated, not exaggerated.
- InspectRead supported metadata locally.
- Embed and read backThe marked output is decoded again immediately to confirm the mark survived.
What it does
- Embed up to 64 characters: a name, a handle, a licence line
- Invisible, balanced and durable strengths, with the trade-off explained
- Verify mode reads a marked image and reports the payload with a confidence value
- Tested at balanced strength: survives JPEG re-encoding at quality 0.75 and 0.9 and a WebP conversion
- Does not survive resizing or cropping; the mark is not cryptography
Questions, answered
What this tool does and does not do.
Is this steganography or DRM?
Neither. It is an ownership signal: a short string woven into the pixel data that you can later demonstrate. It does not stop copying and it does not prove authorship on its own.
What survives, exactly?
At balanced strength, the mark was tested to survive JPEG re-encoding at quality 0.75 and 0.9 and a WebP conversion. Other strengths and conversions were not tested. It does not survive resizing or cropping, which destroy the block layout it depends on.
Can someone remove it?
A determined adversary can degrade or remove most watermarks, including this one. It raises the cost of quiet reuse and gives you evidence; it is not unbreakable.
Why is there a character limit?
The payload is repeated across the image so that partial damage does not destroy it. Keeping it short buys redundancy, which is what makes verification reliable.
Related tools
Further reading
- PNG Text Chunks and AI Generation MetadataHow tEXt, zTXt and iTXt store prompts, seeds and ComfyUI workflows—and why compressed chunks hide from most tools.
- How to Verify Metadata Was Actually RemovedChecking a cleaned file yourself, and what a verified result does and does not prove.
Every claim above describes the current build. Read our privacy approach or check the supported formats and known limits.