Everything you need to protect your work.
Invisible watermarks for your images and videos. Permanent, verifiable registration that works everywhere you share.
Your content carries its own proof.
Anyone can claim your work is theirs. Common Identity gives you something better than a claim: timestamped, verifiable proof. An invisible watermark is embedded directly into the pixels and linked to a permanent registration record that anyone can check.
Your image looks exactly the same, but now it carries a unique, tamper-resistant signature that anyone can verify for free.
Invisible to the eye
The watermark is embedded in ways humans can't perceive. Your image looks completely normal.
Permanently registered
Your watermark is recorded in a permanent public registry with a timestamp, creating a tamper-resistant registration record that exists independently of our company.
Survives modifications
Cropping, filtering, screenshotting, compression. The watermark persists through common transformations.
Permanent embedding
The watermark isn't metadata that can be stripped. It's woven into the image data itself.
Free verification
Anyone can check if an image is watermarked using our verification tool. No account required.
Watermark survives
Your privacy comes first.
Your image is sent to our secure processing server, watermarked in seconds, and returned. We never save your image to disk. It exists in memory only during processing. We keep only the watermark ID, and your ownership record lives in a permanent public registry, independent of our company.
Minimal data collection
We collect only what's necessary to provide the service. We do not use your images to train AI models or serve advertisements.
Transparent architecture
Our security model prioritizes your privacy. We're committed to honest communication about how we protect your data.
Your data, your control
We retain only the minimum data necessary to provide the service. Blockchain registration records are permanent by design, ensuring your ownership proof persists independently.
What we store and how we protect it
| Data | How it's handled |
|---|---|
| Your images | No |
| Watermark IDs | Yes(permanently registered) |
| Your account information | Yes(email, wallet address) |
We take privacy seriously: your images are processed on our server and immediately discarded. Only the watermark ID is recorded.
Works everywhere you share.
Common Identity doesn't require platforms to change anything. Your watermarked image is a normal image file. Share it anywhere. The invisible watermark travels with it.
Social Media
Cloud Storage
Messaging Apps
File Sharing
Any Platform
Feature questions
What image formats are supported?
We support JPEG, PNG, and WebP for images, plus common video formats. We recommend content at least 500×500 pixels for best results.
Is there a file size limit?
Images up to 20 MB are supported. We recommend images at least 500x500 pixels for best watermark results.
How long does watermarking take?
Just a few seconds. Your image is sent to our processing server, watermarked, and returned almost instantly.
Does verification require an account?
No. Verification is completely free and doesn't require an account. Anyone can check if an image is watermarked.
What gets registered?
Only the watermark ID and registration timestamp. Your image is sent to our server for processing but is never saved to disk or retained. The record is permanent and can't be altered.
Can I use this for video?
Yes! Common Identity supports both images and videos.
Ready to protect your work?
Add an invisible watermark in under a minute. Free to start.