How to tell if an image is Stable Diffusion
Stable Diffusion is the open-source workhorse, so its provenance depends entirely on how it was run. The stock library adds an invisible watermark our scanner can detect; the popular community UIs strip it. That variability is why we combine a watermark scan with the visual model.
Visual tells
Hand and finger errors
Especially on SD 1.5, hands are a classic giveaway — extra fingers, fused joints, impossible grips.
Background incoherence
Secondary objects and crowds tend to fall apart on close inspection.
VAE color blotches & repetition
Faint patch-like color artifacts and repeated textures from the decoder.
Leftover generation metadata
Check PNG text chunks — A1111 and ComfyUI often embed the prompt, seed and model name.
Metadata & provenance
| Signal | Present? | What it means |
|---|---|---|
| Content Credentials (C2PA) | No | No C2PA by default. Stable Diffusion is open-source and typically run without any signing pipeline. |
| Invisible watermark | Sometimes | The official diffusers / Stability pipeline embeds an invisible DWT-DCT watermark (“StableDiffusionV1” / similar). Most community forks such as AUTOMATIC1111 turn it off, so it is present only some of the time — when it is, our watermark scanner can read it. |
| Camera / EXIF fingerprint | No | Some UIs write the generation prompt and model into PNG tEXt chunks — worth checking, though easily removed. |
How WeDetect flags Stable Diffusion images
Two-pronged: our metadata checker runs an invisible-watermark scan (the DWT-DCT mark the official pipeline adds) and reads any leftover PNG generation chunks, while the main detector handles the pixels for the (common) case where the watermark was disabled.
Think an image is Stable Diffusion?
Check the pixels and the hidden provenance metadata in one place — free, no sign-up, deleted after analysis.
Frequently asked questions
Does Stable Diffusion always watermark images?
No. The official library does, but the most popular community interfaces disable it, so absence of a watermark does not mean an image is real.
Can you read the prompt used?
Sometimes — many local UIs save the prompt and seed in the PNG's text chunks. Our checker surfaces them when present.
Other generators: Midjourney · DALL·E 3 · GPT-4o Images · Flux · Grok (Aurora) · all generators.