Skip to content
Slop or Not
Theme

Watermark checks

AI Watermark Detector

Before judging pixels, use this AI watermark detector to look for invisible SynthID signals, signed Content Credentials/C2PA, and editable IPTC metadata. Slop or Not checks provenance first and does not pass online uploads to outside AI companies.

  • You can testPhotos, screenshots, product images, receipts, and profile pictures up to 8 MB.
  • ResultA probability verdict, AI score, and source details when the file carries them.
  • PrivacyDeleted the moment the check finishes. We never keep your photo.

AI detection is probabilistic. Results can vary with new AI models and evasion methods. A real photo edited with AI tools can be flagged as AI.

Online checks are deleted after processing.

What it checks

Check for Watermarks Before Judging the Pixels

SynthID watermark evidence for supported OpenAI and Google/Gemini images

C2PA or IPTC provenance data when the file carries it

Visual detection when watermark evidence is missing or inconclusive

Good Uses

  • Checking whether a file still carries generator provenance
  • Reviewing images before publication or classroom use
  • Separating metadata evidence from visual probability scores

Limits to Know

  • Not every generator uses the same watermark system
  • Provider verifiers are scoped to their own signals, not every AI watermark
  • C2PA and IPTC metadata can be stripped by screenshots, exports, or re-encoded uploads

FAQ

AI Watermark Detector Questions

Is an AI watermark always visible?

No. An AI watermark is often invisible. Some signals are embedded in the image itself, like SynthID, while others live in metadata, like C2PA Content Credentials or IPTC disclosure fields.

Why might a watermark be missing from an AI image?

C2PA and IPTC metadata are easier to strip than SynthID. Screenshots often remove metadata fields, while SynthID is embedded in the image. Repeated heavy edits or severe recompression can still make a check inconclusive.

What if there is no watermark?

Slop or Not still checks the pixels and reports a probability when the file has no readable provenance. A missing watermark is not proof that a person made the image.

Related checks

Compare Related Detector Workflows

SynthID Watermark Checker

Check images for SynthID watermark signals. Slop or Not checks supported OpenAI and Google/Gemini provenance, then checks pixels when signals are unclear.

C2PA Detector

Use this C2PA detector to check Content Credentials with Slop or Not. It reads signed provenance, then checks pixels when credentials are absent.

AI Image Detector

Use Slop or Not as an AI image detector when the source is unknown. It checks SynthID, C2PA/IPTC metadata, and pixels before reporting a result.