Tools & Guides
AI image detector: what it can tell you, and what it cannot
December 18, 2025
8 min read
A practical guide to automated detection limits and why evidence still matters.
If you need to verify the authenticity of an image and check whether it was generated by AI, you can use our free AI image detector.
Try our AI image detector
## The Probability Game
When you use an [AI image detector](/), you aren't getting a "Yes/No" from a divine oracle. You are getting a **probability score**.
"98% AI" means the model found statistical patterns (noise distribution, compression artifacts, semantic inconsistencies) that strongly correlate with training data from generators like Midjourney or DALL-E 3.
### Where detectors struggle
1. **Heavy Compreesion**: Social media platforms strip metadata and re-compress images, destroying the subtle "fingerprints" detectors look for.
2. **Hybrid Images**: A real photo with a small AI-generated cat added to it. The overall image stats might look real, masking the edit.
3. **Adversarial Noise**: Sophisticated actors add invisible noise layers specifically designed to fool detectors.
## Why it matters
Over-reliance on automation is dangerous. False positives can accuse innocent artists; false negatives can let fraud slip through.
## Quick checks
* **Don't stop at the score**: Use the score as a filter. If it's high, investigate. If it's low but the image looks suspicious, investigate.
* **Look for semantic errors**: Hands, text, physics. AI is getting better, but logic errors persist.
## What to do next
For critical verification:
1. Start with our [AI image detector](/).
2. If the result is ambiguous or the stakes are high, use our **Human Certificate** service to get an expert review.