What the AI art detector looks for
AI art and AI photos leave different traces, so the order of evidence matters here. Image generators used for art, such as Stable Diffusion front ends, ComfyUI and NovelAI, often save the full prompt, model name, seed and sampler settings inside the PNG file. That embedded text is the single most useful clue for art, and the AI art detector reads it first.
- Embedded prompts and workflows: "parameters" text from Automatic1111 and Forge, "prompt" and "workflow" JSON from ComfyUI, and NovelAI comment fields.
- Generator tags: software names and the IPTC Digital Source Type field, which Midjourney, Google and Adobe use to label AI output.
- Content Credentials: signed C2PA manifests from Adobe Firefly, OpenAI image models, Google Gemini and art apps that support them.
- Model score: the detection model's judgement of the pixels, used when the file is clean.
How to check artwork with the AI art detector
- Use the original file when possible. Ask the artist or seller for the file they exported, not a screenshot of a post.
- Drop the artwork into the box above or paste it with Ctrl+V.
- Check the verdict and the reasons. A prompt or a ComfyUI workflow in the file is decisive.
- Open "Show details" to see which software saved the file and whether any signature validates.
- Compare with the artist's other work. Consistent style across years of posts, sketches and studies is hard to fake.
Visual signs of AI-generated art
Generators have improved fast, but art made with them still shows patterns that trained eyes recognise. Use these as supporting clues next to the AI art detector result:
Lines and edges
Line art that fades in and out without reason, outlines that merge two objects into one, and "painterly" strokes that never overlap the way real brush strokes do.
Details that do not resolve
Jewellery, buckles, lace, weapon parts and mechanical details that look rich at thumbnail size but turn into soft noise when you zoom in.
Anatomy and props
Hands holding objects in impossible grips, hair strands that pass through accessories, mismatched eyes or earrings, and clothing seams that go nowhere.
Text and symbols
Signatures, runes, book titles and UI elements that look like writing but are not any real script.
Style without process
An account with a huge output of finished pieces and no sketches, studies, timelapses or work in progress deserves a closer look.
AI art detector accuracy on illustrations
The detection model was trained on images from thousands of generators, many of them Stable Diffusion variants fine-tuned for anime and illustration styles, alongside real photographs and human-made images. It handles typical anime and concept art from open models well. It is less sure about:
- Highly polished human digital paintings with smooth gradients, which can look "too clean".
- Art from the newest commercial generators that came out after training.
- Pieces that mix AI and human work, such as AI backgrounds with hand-drawn characters or paint-overs of AI sketches.
- Pixel art, vector art and very small images, where there is little texture to analyse.
Measured numbers for each generator are in the accuracy report.
Fair use of an AI art detector
Accusing an artist of using AI can damage their reputation and income, and false positives do happen. If you run an art contest, a commission marketplace or a community with an AI policy, treat a high score as a reason to ask for process files, not as a verdict. Artists who want to prove their work is human can keep layered files and timelapses, and can sign exports with Content Credentials in apps that support it. The C2PA checker shows what those credentials contain.
Commissions, prints and stock art
Buyers increasingly ask whether a commission, a print-on-demand design or a stock illustration is AI generated, often for licensing reasons. Check the delivered file before you pay the final instalment, ask for a work-in-progress image, and read the platform's AI disclosure rules. If the file contains a prompt or a generator's credentials, you have a clear answer to raise with the seller.