Tools and features checked against official Google and Content Credentials sources on October 13, 2026. Detection technology changes quickly, and no method is 100% reliable.
AI-generated images are now so realistic that a fake photo can spread across social media in minutes. Learning to check images is a key digital skill for students, teachers, parents and anyone who shares news online. This guide covers free tools that can help, plus the visual clues to look for, and an honest note about their limits.
1. Ask the Gemini app: "Is this AI-generated?"
In November 2025 Google added image verification to the Gemini app. Upload an image and ask something like "Was this created with Google AI?" or "Is this AI-generated?" Gemini checks for SynthID, Google's invisible watermark, and uses its own reasoning to give you more context.
- What it can detect: a SynthID watermark means the image was made or edited with Google AI. Google says SynthID has been used to watermark over 20 billion pieces of AI content.
- The limit: if no SynthID watermark is found, that does not prove an image is real. It may have been made with a tool that doesn't use SynthID.
Official page: AI image verification in the Gemini app
2. SynthID Detector
Google DeepMind's SynthID Detector is a verification portal that checks images, video and audio for a SynthID watermark. Google says it is now open to everyone, and that it can also detect watermarked content from partners including OpenAI, NVIDIA and Kakao.
Official page: SynthID (Google DeepMind)
3. Content Credentials
Some cameras, apps and AI tools attach Content Credentials to images, a kind of digital "nutrition label" showing how a file was created or edited. The Content Credentials Verify site describes this as a standard that provides "deeper transparency into how content was created or edited." Upload an image to see its credentials, if it has any.
Official page: Content Credentials Verify
4. Reverse image search
Searching with an image, for example with Google Lens, can show where else it has appeared online. If a "breaking news" photo actually appeared years ago, or first came from an AI art account, that's a strong clue.
Visual clues to look for
AI images are improving fast, so these clues are hints, not proof:
- Hands and fingers: extra, missing or merged fingers.
- Text: signs, labels or logos with garbled or nonsense letters.
- Backgrounds: warped buildings, impossible architecture, or people blurring into each other.
- Too perfect: waxy skin, perfect symmetry, or unusually dramatic lighting.
- Small details: mismatched earrings, odd glasses, or jewellery that melts into skin.
Think before you share
- Check the source. Is it from a reliable news organization, or an anonymous account?
- Look for other coverage. Real major events are reported by multiple trusted outlets.
- Notice your emotions. Images designed to make you angry or shocked are the ones most worth checking.
- When in doubt, don't share.
Creating AI images yourself?
Label them clearly when you share them, and never create misleading images of real people. Many platforms ask creators to disclose realistic AI content. See our guide to free AI image generators for tools and responsible-use tips.
Know a useful verification tool? Share it through our Contact page.
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