Which AI Image Detector Performs Better? ImageDetector vs. IMGDetector.AI

Someone on a dating app spent a month talking to a person who didn't exist.

The profile photos were convincing. The face was symmetrical, well-lit, and completely synthetic. 

Generated in seconds by an AI tool, dropped into a fake profile, and left there to do its job. By the time the person on the other end realized something was wrong, they had already sent money. 

These scenarios are increasingly becoming more common as AI-generated images are being used to catfish people on dating platforms, impersonate executives in video calls, fabricate evidence in legal disputes, and more. 

The images look real because the tools making them have gotten very good, very fast.

Detection tools are supposed to fix that. But a tool is only as useful as its accuracy, and most of them haven't been honestly stress-tested against the generators people are actually using right now.

ImageDetector and IMGDetector.AI are both free platforms making credible claims. Free tools tend to overpromise and underdeliver, so we ran six samples through both to find out which one actually holds up.

What is ImageDetector?

ImageDetector (imagedetector.com) is a free AI image detection tool built around accessibility. No sign-up, no paid tier. You upload a JPG, PNG, or WEBP file and get a result within seconds.

Its detection engine analyzes visual signals only, specifically texture patterns, noise behavior, and structural details. It does not use watermarks or metadata to reach a verdict. 

That's a deliberate design choice, and it's worth understanding because it means the tool is working purely from what it can see in the image itself.

It covers the generators you'd expect, Midjourney, Stable Diffusion, DALL-E, Gemini, and a handful of others. 

The result is a clean, with a pretty straightforward score. It won't walk you through its reasoning that much, but for a free tool with no sign-up required, the simplicity is part of the point.

What is IMGDetector.AI?

Where ImageDetector keeps things visual, IMGDetector.AI claims to go deeper. It runs pixel pattern analysis, GAN fingerprint scanning, and metadata review alongside watermark detection, including invisible watermarks like SynthID. 

That last one matters more than it sounds. A lot of AI-generated images carry hidden signatures that the naked eye will never catch. IMGDetector.AI is specifically looking for them.

The output is also more communicative, you get a clear REAL or AI verdict with a confidence percentage and a short explanation attached. Useful if you need to show your work or hand the result to someone else.

Generator coverage is broad, Midjourney, Stable Diffusion, DALL-E, Adobe Firefly, and several others. It also has face recognition and reverse image search built in, which puts it in a different category from most free detection tools.

There is one catch worth knowing before you rely on it. IMGDetector.AI caps free users at five scans before locking them out for five hours. For anyone reviewing more than a handful of images at a time, that ceiling hits fast.

A Quick Note on Privacy

IMGDetector.AI is unambiguous: no image is stored, nothing is saved, and analysis happens in the cloud instantly.

ImageDetector states that images are stored in accordance with its privacy policy. That's a softer position than a flat denial of storage. If you're submitting sensitive images, that distinction matters and it's worth reading their privacy policy before you upload.

What We Tested

Six samples, covering the generators most likely to produce images people actually encounter and the real-world controls that expose false positive problems.

Test 1: AI-generated image from ChatGPT 

Test 2: AI-generated image from Gemini 

Test 3: AI-generated image from Midjourney 

Test 4: AI-generated image from Stable Diffusion 

Test 5: Real photo taken on a phone, edited in post 

Test 6: Raw, unedited photo taken on a phone

Tests 1 through 4 are the core detection challenge. Tests 5 and 6 are the controls.

A false positive on a raw unedited photograph is the result that should give anyone real pause about trusting a tool for anything that carries real consequences.

ImageDetector vs. IMGDetector.AI: AI Image Detection

Test 1: ChatGPT-Generated Image 

ImageDetector: Correctly Flagged the Image as AI- Generated
AI Likelihood Score: 90%

IMGDetector.AI: Did not give out a conclusive result flagging the image as possibly AI- Generated
AI Likelihood Score: 28%

Test 2: Gemini-Generated Image 

ImageDetector: Correctly Flagged the Image as AI-Generated
AI Likelihood Score: 99%

IMGDetector.AI: Incorrectly identified the image as Human 
AI Likelihood Score: 16%

Test 3: Midjourney-Generated Image 

ImageDetector: Correctly Flagged the Image as AI-Generated 
AI Likelihood Score: 99%

IMGDetector.AI: Incorrectly identified the image as Human
AI Likelihood Score: 3%

Test 4: Stable Diffusion-Generated Image 

ImageDetector: Correctly Flagged the Image as AI- Generated
AI Likelihood Score: 97%

IMGDetector.AI: Incorrectly identified the image as Human
AI Likelihood Score: 11%

Test 5: Real Photo, Edited 

ImageDetector: Correctly identified the Image as Human  
AI Likelihood Score: 10%

IMGDetector.AI: Correctly identified the Image as Human
AI Likelihood Score: 7%

Test 6: Real Photo, Raw 

ImageDetector:  Correctly identified the Image as Human 
AI Likelihood Score: 9%

IMGDetector.AI: Correctly identified the Image as Human
AI Likelihood Score: 13%

Quick Summary

Test	ImageDetector	IMGDetector.AI
#1 ChatGPT Image	90%	28%
#2 Gemini Image	99%	16%
#3 Midjourney Image	99%	3%
#4 Stable Diffusion Image	97%	11%
#5 Edited Real Photo	10%	7%
#6 Raw Real Photo	9%	13%
Correct Verdicts	6/6	2/6

The Bottom Line

The real photos are the controls here and getting them wrong would disqualify a tool immediately. Neither one did. Credit where it's due.

The AI-generated images are where the test actually separates them.

ImageDetector went six for six. Every synthetic image flagged correctly, with scores ranging from 90% up to 99%. These weren't close calls.

IMGDetector.AI went two for six. Both correct results were the real photos. On the AI-generated images, it missed all four. Midjourney came back human at 3%. Stable Diffusion came back human at 11%.

The ChatGPT image got a 28% score, which isn't a verdict, it's a shrug.

That's a hard result to explain for a tool that specifically lists Midjourney, Stable Diffusion, and DALL-E as generators it's built to catch.

For the free version the five scan limit compounds the problem. Hit your ceiling and you're locked out for five hours.

IMGDetector.AI has the longer feature list. Multi-method analysis, watermark detection, face recognition, reverse image search. None of that changes what the numbers showed.

ImageDetector is the pick. Unlimited, free, and it got every single result right.