Free · No sign-up · Runs in your browser

Was this picture made with AI?

Many AI tools now sign what they make with Content Credentials, a tamper-evident record inside the file. Drop in a picture to read it: made with AI or a camera, which tool, who signed it and whether it’s been changed since.

Not uploaded — nobody sees it Official C2PA checker Finds AI labels in metadata Free, no sign-up

Drop a picture here, or click to browse JPG, PNG, WebP, AVIF, HEIC, TIFF, GIF, or an MP4/MOV video

Your picture is never uploaded — it’s checked right here in this browser tab, on your device. It never reaches a server, so we never see it, copy it or keep it.

At a glance

AI Image Checker: quick facts

Check a picture’s Content Credentials and metadata for AI, free and in your browser.

Updated 10 October 2026

Price: Free. No sign-up, no limits.
Checks: Content Credentials (C2PA), IPTC AI labels and AI generator settings.
Shows: Made or edited with AI, who signed it, the edit history, and whether it was changed since.
Files: JPG, PNG, WebP, AVIF, HEIC, TIFF, GIF, MP4 and MOV.
Privacy: Checked in your browser. Your picture is never uploaded.

How it works

How the AI image check works

The page loads the open-source C2PA library from Altto’s own server, reads the signed Content Credentials inside your file and checks the signature and the picture still match. It also looks through the picture’s ordinary information for AI labels.

Add a picture

Drop in a JPG, PNG, WebP, HEIC or other image, or an MP4/MOV video.

Read the result

See whether it says AI, camera or edited, who signed it and its history.

Weigh the clues

No record isn’t proof of anything: use it alongside a reverse image search.

Tips

Getting a reliable answer

Content Credentials are the strongest evidence a file can carry, but they only help if they survive the journey to you.

Check the original fileAsk for the file itself rather than a screenshot or a copy saved from social media; those usually lose the credentials.
Look at who signed itA signature from a well-known AI or camera company means more than one from a name you don’t recognise.
“Changed since signing”If the check fails, the picture was altered after it was signed, so don’t rely on what the record says.
Still unsure?Try a reverse image search to find where it first appeared, and look closely at hands, text and reflections.

Like every Altto tool, this runs on your device — nothing you add is uploaded. How Altto works

C2PA

is the open standard behind Content Credentials, backed by Adobe, Google, Microsoft, OpenAI and camera makers. The EU AI Act’s rules on labelling AI-generated content apply from August 2026.

Who adds it

Which tools add Content Credentials

Support is growing quickly, but it isn’t everywhere yet (October 2026).

Content Credentials in popular tools
Tool	Adds Content Credentials?	Notes
OpenAI (ChatGPT images, Sora)	Yes	Adding SynthID watermarks too (announced May 2026)
Adobe Firefly and Photoshop generative tools	Yes	Marks AI-made and AI-edited pictures
Google AI image tools	Yes	Also uses SynthID watermarks
Microsoft Designer / Bing Image Creator	Yes
Midjourney	Not as of early 2026	May still be named in the picture information
Stable Diffusion apps	Usually not	Some save the prompt and settings in PNG files, which Altto spots
Some cameras and phones (e.g. Leica, Google Pixel)	Yes, on supported models	Marks the picture as a real capture

FAQ

Frequently asked questions

Checking pictures for AI on your own device. Need to see a photo’s other details? Try Remove PDF Metadata for documents, or shrink a picture with Compress Image.

How can I tell if a picture was made with AI?

Start with its Content Credentials: a signed record that tools such as ChatGPT and Sora, Adobe Firefly and Google’s AI image tools attach to what they make. Drop the picture here to read it. If there’s no record, the picture’s ordinary information (IPTC, XMP, PNG text) sometimes still names an AI tool or says “trained algorithmic media”. If neither is there, look for visual tells and do a reverse image search; no checker can prove a picture is real.

What are Content Credentials (C2PA)?

C2PA is an open standard from the Coalition for Content Provenance and Authenticity. A picture with Content Credentials carries a cryptographically signed record of who made it, which tool was used, whether AI was involved and what edits were made. If anyone changes the picture afterwards, the signature stops matching and Altto tells you.

No credentials were found. Does that mean it’s real?

No. Screenshots, social media sites and messaging apps usually strip this information, and many AI tools (and almost all phone cameras) don’t add it. No credentials means “no record”, not “real photo”.

It says made with AI. Can that be wrong?

Content Credentials are signed, so they can’t be quietly altered without the check failing. A picture can, however, be signed by anyone with a certificate, so Altto shows who signed it. Clues in ordinary picture information (not signed) can be added or removed by anyone, so treat those as hints.

Is my picture uploaded?

No. The checker (the official open-source C2PA library, a few megabytes to download the first time) runs in this browser tab and your picture never leaves your device. A few pictures keep their credentials on another website instead of inside the file; Altto only looks those up if you press the button to, and even then only the record is requested, never your picture.

Can it find invisible watermarks like SynthID?

No. Google’s SynthID and similar invisible watermarks need the maker’s own detector. Google and OpenAI offer their own checks for pictures made by their tools.

Which files can I check?

JPG, PNG, WebP, AVIF, HEIC, TIFF and GIF pictures, plus MP4 and MOV videos (such as Sora clips), which can also carry Content Credentials.

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