Free AI image detector for local signal checks
without uploading your file

Run AICheck metadata, watermark, and C2PA evidence checks in your browser. The result reports a numeric evidence score, not certainty or proof of authenticity.

Local by design: Image bytes stay in this browser tab and are not sent to SugarCube.

Check an image’s source clues

PNG, JPEG, or WebP · maximum 20 MB · you can also paste an image

Use the original download when possible. Screenshots and re-saved files can lose useful evidence.

This checks retained evidence, not whether a picture is true. No signals does not mean human-made.

Checking supported file signals…

This work happens locally in your browser.

01 Validate the image file signature
02 Run AICheck metadata detectors
03 Verify embedded C2PA credentials locally
04 Run AICheck pixel detectors
Local signal report
Calculating…

Evidence confidence score
0/100
AICheck grade: None
No specific generation source identified
Local image views

Preview views are exploratory only and do not affect the evidence score.

Preview of the selected image

What to do with this result

Inspect the individual signals below and ask the source for the original file or creation history. Save the report to keep the evidence together.

Evidence found by AICheck

View technical report details

Machine-readable local report


        


      

    


    

How to use this tool
  1. Choose the original image
    Choose a PNG, JPEG or WebP. The check runs locally without sign-in or credits.
  2. Read the separate checks
    Read metadata, credential status and pixel clues separately.
  3. Review the evidence and save a report
    Review explanations and save JSON if needed. Signals do not prove authenticity.
When image-source clues can help
Signals from an actual scan
Original
Original1440 × 810 · 796.6 KB
This known AI-generated illustration returned no signals, score 0 and an inconclusive result in the actual local scan. No detected evidence does not mean the image was made by a person.
Download originalDownload report
Screen a submitted portrait
Illustrative studio portrait for source-checking context
Inspect the original portrait for source fields before asking the contributor how it was made. Treat the report as a lead for a conversation, not proof about the person.
Document a product asset
Illustrative perfume product image
Check a product image before adding it to a media library. Record the available metadata and keep the supplier’s original files and explanation alongside it.
Investigate a news-style scene
Illustrative fictional community parade scene
Look for retained provenance signals in an event image, then verify the event through its source and other reporting. This tool cannot establish that a pictured event happened.
Organize architectural references
Illustrative architectural concept model
Separate concept renderings from documented project photos in your reference collection. Embedded information can help organize files but does not prove a building exists.
Continue with a related tool
Swipe to explore related tools
Image compressor
Image compressor
Reduce an image file locally before sharing it.
AI image generator
AI image generator
Start a new image from a prompt and optional references.
Visible Gemini mark remover
Visible Gemini mark remover
Process a supported visible mark on images you may edit.






        
AI image signal check FAQ

        

          

            Does SugarCube upload my image?
            
No. This page reads the selected file in your browser and does not send its image contents to SugarCube.

          

          

            Can a low score prove an image is real?
            
No. A low score only means this check found weak or no currently supported evidence.

          

          

            Does this verify C2PA Content Credentials?
            
Yes, when an embedded manifest is present. The official C2PA browser SDK parses and validates it locally; validation warnings are shown separately.

          

          

            Do the color and edge views detect AI generation?
            
No. They are local visual aids and do not contribute to the evidence score.

          

        

      





Choose an image to inspect
Your file stays on this device. Return to the tool to choose it and review the result.
Choose a file