AI Watermark Checker
Checked in your browser. Nothing is uploaded.
What it checks
Images
- Content Credentials (C2PA)
- The signed record ChatGPT, Firefly, Google and others attach. Signature and image are verified.
- AI label
- The IPTC “made with AI” field in the metadata.
- Generator data
- Prompts and settings saved by Stable Diffusion tools.
- SD watermark
- Stable Diffusion's invisible pixel watermark.
Text
- Invisible characters
- Zero-width characters, tags and variation selectors. Hidden messages are decoded.
- Look-alike letters
- Cyrillic or Greek letters inside Latin words.
- Unusual spaces
- Narrow no-break spaces, controls and similar.
No watermark doesn't mean a person made it: screenshots and social networks strip metadata, and Google's SynthID can only be read by Google.
API for agents
Send up to 5 files of 10 MB, or texts, per request; 300 images an hour in all. No key needed. Files are deleted from memory as soon as they are checked.
curl -sS https://symelo.com/api/v1/ai-watermarks/check \
-F "[email protected]" \
-F "text=Text to check"