AI Image Detector Tools (2026): 10 Ways to Check AI Photos

A product photo that looks too perfect, a profile picture on a new supplier's account, a viral image someone wants you to share: these are the moments people go looking for an AI image detector. The right tool depends on whether you're checking one picture today or thousands a week.

The ten tools below are listed alphabetically and in no particular order. Every description comes from the tool's own website, as of Oct 2026, and nothing here claims more about what a detector can catch than its own page does.

Image detectors compared at a glance

Tool	Type	Good for
AI Image Detector	Free web image checker	One-off checks with a written explanation
Copyleaks	Pixel-level image detector	Seeing which parts of an image look AI-made
Decopy	Free online image checker	Checking an image before you share it
Hive	Detection APIs for platforms	Screening images, video and audio at scale
Is It AI	Image, video and music detector	A few checks before you make an account
Sightengine	Moderation suite with AI detection	Adding AI checks to content moderation
Undetectable AI	Online AI photo checker	A clear confidence score on one image
Was It AI	Image detector with a browser extension	Checking images straight from the browser
Winston AI	Text and image detection suite	Image checks beside text and plagiarism checks
ZeroGPT	AI image detector	Product photos, receipts and profile pictures

Ten detectors for checking AI images

AI Image Detector

Best for: Quick checks on a single image, returning a confidence score with visual indicators and reasoning; the page says core detection features are free.

Copyleaks

Best for: Teams who want to see where AI generation or manipulation sits inside an image, not only a score, in a tool built into their workflows.

Decopy

Best for: Anyone who wants to check whether an image is AI generated before they share or engage with it, from a page titled as a free detector.

Hive

Best for: Platforms that need APIs to identify synthetic images, video and audio at scale, with a demo and a playground to try first.

Is It AI

Best for: Casual users who'd like to check a photo before signing up; the page names a free start with no card, plus separate video and music detectors.

Sightengine

Best for: Businesses already moderating images and text that want AI image detection and deepfake detection inside the same product.

Undetectable AI

Best for: People who want a detailed analysis of whether an image is AI-generated or human-made, returned with a clear confidence score.

Was It AI

Best for: Regular checkers who'd like a browser extension; upload the original file, as the page warns screenshots may lower detection quality.

Winston AI

Best for: Anyone wanting AI image detection next to an AI text detector and plagiarism checker in one account, which the page invites you to create free.

ZeroGPT

Best for: Sellers and support teams checking product photos, documents, receipts and profile pictures for signs of AI generation before they approve them.

Free web checker, pixel map or platform API?

The quick free checkers are built for one image at a time. AI Image Detector says its core detection features are completely free, and Is It AI lets you run a few image checks without making an account. Was It AI gives free credits on sign-up, and Winston AI asks you to create a free account to scan your own images. Decopy's page is titled as a free AI image detector, and Undetectable AI says it returns a clear confidence score.

The other tools go deeper or wider. Copyleaks highlights every pixel augmented by AI instead of giving only a score, so you can see which part of a picture is in question. Hive's detection APIs identify synthetic images, video and audio at scale, and Sightengine lists AI image detection inside a wider moderation product. ZeroGPT pitches checking product photos and promotional visuals, plus receipts and IDs. That split, one-off checker, forensic map or platform API, matters far more than any single feature.

Why a detector gives you a likelihood, not proof

Every tool on this list describes its result as an analysis or a confidence score. That's useful, but it isn't a final answer on where an image came from. A detector can be fooled by heavy editing, and it can flag a real photo that's been filtered or compressed. One vendor's own page warns that screenshots may lower detection quality, which is a good reminder that the file you upload changes the answer you get.

So use a detector the way a journalist uses a single source: as one signal you weigh alongside others. If the image matters, because you're about to publish it, pay for it or accept it as evidence, check it more than one way before you decide.

What these tools look at in an image

• Generator patterns. AI models leave subtle textures, lighting and edge patterns that detectors are trained to recognise.
• Edited areas. Pixel-level tools mark the parts of an image that look generated or changed, which helps when only one element was swapped.
• Faces. Some checkers focus on profile photos and AI-generated faces used on fake accounts.
• Documents and receipts. A few tools say they check scanned documents and proof-of-payment screenshots for synthetic edits.
• Video and audio. Several vendors run separate detectors for video, music or voice, so check you've picked the image tool.

Checking text rather than pictures? My list of free AI content detector tools covers written content.

How to check an image before you publish it

1. Find the original file. Upload that, not a screenshot or a version saved from a chat app.
2. Run it through two detectors of different kinds, such as a quick checker and a pixel-level tool.
3. Look at where the tool says the AI is, not only the overall result.
4. Do a reverse image search to see where the picture first appeared and who posted it.
5. Ask the person who sent it for the source, the raw file or other shots from the same set.
6. If the results still disagree, don't publish it as real until you've confirmed it another way.

Do you make AI image detection or content verification tools? Tool makers can ask to be considered for a featured place on this list.

My plain advice on checking a suspicious image

For a one-off check, a free web checker is the quickest place to start, but don't stop at a single result. Upload the original file, try a second detector of a different kind, and look at where the tool thinks the AI is. If you run a platform that takes in images from the public, an API built for scale is the better fit. Whatever you use, the result is a likelihood, so it's your judgement that makes the final call.

Checking images is part of a bigger habit. My guides to fact-checking AI-generated marketing content and spotting a fake product review cover the rest of it.

Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.

Frequently asked questions

What is an AI image detector?

It's a tool that analyses a photo or image for patterns AI generators leave behind, then gives you a likelihood that the image was made or changed by AI.

Are AI image detectors accurate?

They can be useful, but no detector gives you proof. Editing, filters, compression and screenshots can all change the result, so treat it as one signal and check important images more than one way.

Are there free AI image detectors?

Yes. Several tools on this list say you can check images free, some without an account. Check each tool's own site for how many checks the free option includes.

Can an AI image detector show which part of a photo is fake?

Some can. Pixel-level detectors highlight the areas they think were generated or changed, rather than giving one result for the whole image.

Why does my screenshot give a different result?

A screenshot loses detail from the original file, and at least one detector on this list warns that screenshots may lower detection quality. Upload the original wherever you can.

Can businesses check images in bulk?

Yes. Some vendors on this list sell detection APIs or moderation products for platforms that need to screen large numbers of images, video and audio.