Free, on your device, no upload
Drop an image to read what it records about itself: signed Content Credentials, AI labels, and the prompts and settings AI generators leave behind. Then check it for an invisible SynthID watermark.
Checking
Some AI tools also hide a watermark in the pixels. It is built to survive cropping, filters and compression, but only the company that adds it can read it.
Run OpenAI's official check with your OpenAI API key. It reads OpenAI's SynthID watermark and Content Credentials.
No API key? Upload the file to OpenAI's verify page.
Images from Gemini, Imagen and Nano Banana carry Google's SynthID. Google's free detector reads it, and so do Gemini and Google Lens if you ask "Is this made with AI?".
SynthID Detector Ask in GeminiMidjourney, Stable Diffusion and FLUX are not SynthID partners. For their images, the labels, prompts and settings this checker reads are the signs to look for.
Labels live inside the file as it was made or downloaded. Screenshots and most social apps strip them, so ask for the original when you can.
It reads Content Credentials, AI labels, generator settings and camera details in your browser. Nothing is uploaded.
Signed Content Credentials are the strongest evidence, AI labels and generator settings are strong hints, and camera details are only a hint.
For images from ChatGPT or the OpenAI API, run OpenAI's check with your API key on this page. For Google images, use Google's SynthID Detector or ask Gemini.
Find where the image first appeared with a reverse image search, and look at who posted it and when.
| Result | What the file says | How much it proves |
|---|---|---|
| Made with AI | Signed Content Credentials, an IPTC AI label, or a generator's prompt and settings say an AI tool created the image. | Trusted Content Credentials are close to proof. A label or settings are strong evidence, but they can be copied into another file. |
| Edited with AI | Generative AI changed or added part of an existing image. | As above, for the part that was changed. |
| Captured by a camera | Signed Content Credentials from a camera or phone say it captured the image, and record no AI changes. | Strong for the capture. Edits made later in apps that do not write credentials are not covered. |
| Content Credentials, no AI recorded | Someone signed a history for the file that has no AI step. | Depends on the signer. Trusted means a company on the public C2PA trust lists signed it. |
| No AI labels found | Nothing in the file says either way. | Not evidence that the photo is real. Screenshots and most apps remove labels, so check the invisible watermark and the source too. |
| AI tool | Content Credentials | Invisible watermark | Visible mark or label |
|---|---|---|---|
| ChatGPT and the OpenAI API | Yes, signed by OpenAI | SynthID, since May 2026 | None |
| Google Gemini and Nano Banana | Yes, on Nano Banana Pro and newer models | SynthID | Gemini sparkle on free and AI Pro plans |
| Adobe Firefly | Yes, when every pixel comes from Firefly | Not documented | None |
| Bing Image Creator | Yes | Not documented | Mark in the bottom left corner |
| Meta AI | Not documented | Meta's own, no public checker | "Imagined with AI" on photorealistic images |
| Stable Diffusion apps and ComfyUI | No | None you can check | None, but the prompt and settings often stay in the file |
From each company's own documentation, checked October 2026. Sources and details: how to tell if an image is AI-generated.
A signed record that AI tools such as ChatGPT and Adobe Firefly, and some cameras, attach to images. The signature is verified against the public C2PA trust lists with the open-source reader from the Content Authenticity Initiative.
The IPTC "digital source type" that AI tools and editors write to say an image was generated or edited with AI, and the AIGC label China requires on AI content.
The prompt, negative prompt, model and settings that Stable Diffusion apps, ComfyUI and other generators leave in the file. The checker shows them.
Make, model and lens in the EXIF. AI images rarely have them, but they are easy to copy, so they count as a hint, never as proof.
Yes. Everything that runs in your browser is free, with no sign-up and no daily limit. OpenAI's SynthID check uses your own OpenAI API key; OpenAI says the check is currently free and subject to usage limits.
No tool can do that reliably, and tools that guess from the pixels often accuse real photos. This checker reads what the file itself records: signed Content Credentials, AI labels and generator settings, which most big AI tools now add, plus the SynthID checks run by the companies that embed the watermark. When those are missing, it says so instead of guessing.
Not a visible one. ChatGPT images carry Content Credentials signed by OpenAI, and OpenAI says they also carry an invisible SynthID watermark. ChatGPT images we checked in October 2026 showed trusted Content Credentials from OpenAI OpCo, LLC, created with ChatGPT, and the credentials themselves record that a watermark was added.
Google puts its invisible SynthID watermark in images made with its AI. Upload the image to Google's SynthID Detector, which is open to everyone, ask the Gemini app "Was this image created or edited by Google AI?", or ask Google Lens "Is this made with AI?". Drop it here as well: if Content Credentials or an AI label survived, this checker shows them.
Screenshots never carry labels, and most social apps and messengers strip them when you post or forward an image. Ask for the original file, or try the SynthID checks, which survive many of those steps. Midjourney, Stable Diffusion and FLUX images only show up when their settings or labels are still in the file.
An invisible watermark woven into the pixels by Google DeepMind's models and, since 2026, by OpenAI's. Google says it is designed to survive cropping, filters and lossy compression, though many edits can still weaken it. Only its makers can read it: OpenAI's check runs here with your OpenAI API key, and Google's runs on Google's SynthID Detector or in the Gemini app. Read what SynthID is and how to check it.
A signed record, defined by the C2PA standard, that AI tools such as ChatGPT and Adobe Firefly and some cameras attach to images. It says what made the image and how it was edited. We check the signature against the public C2PA trust lists: "trusted" means a known company signed it and the image has not changed since. Read Content Credentials explained.
Yes, when the generator saved it in the file. Stable Diffusion apps such as AUTOMATIC1111, and ComfyUI, write the prompt and settings into the image, and the checker shows them, along with the prompts some other generators save. ChatGPT does not store your prompt in the image.
No. The checks run in your browser. Only if you click Check with OpenAI is the file sent, from the isolated key panel on ai.uncrop.si straight to OpenAI with your own key.
We do not offer that. SynthID is designed to survive editing, and stripping provenance so an AI image passes as a real photo is deceptive. Rules in China and the EU require AI-generated images to be labelled. If one of your own photos is flagged wrongly, the original file and its Content Credentials are the way to show its history.
Recover a cropped photo Check a JPG or PNG for a hidden original preview or leftover screenshot data. Unique 
AI image extender Outpaint with GPT Image, Nano Banana, FLUX.2 or Stable Image using your own API key. Your key 
Convert image format Convert between JPG, PNG and WebP. 
Uncrop a photo Extend any photo beyond its edges with free Smart fill, Texture fill, blur or mirror. Popular AI images
A five-step routine that works: read the file's labels, check for SynthID, look for visual clues, then check the source. Free tools, and what each can prove.
Read the guideAI images
SynthID is the invisible watermark in images from Google AI and, since May 2026, ChatGPT. What it is, how to check for it for free, and what a result means.
Read the guideAI images
Content Credentials are a signed record of how an image was made. What they show, trusted versus valid, who adds them, and how to check them for free.
Read the guide
Change aspect ratio
Portrait to landscape
Instagram no crop
Full DP, no crop
Crop
Resize
Rotate
Flip
Add text
Add a frame
Round corners
Remove background
Adjust photo
Brightness
Contrast
Saturation
Black and white
Compress
JPG to PDF
AI image checker