Image Diff Tool — Compare Two Images Free

Upload two images and see exactly where they differ. Differences are highlighted in red for instant visual comparison.

📷 Image A (Original)

Drop first image here

JPG, PNG, WebP — Max 10MB

📷 Image B (Modified)

Drop second image here

JPG, PNG, WebP — Max 10MB

Sensitivity (Threshold): 10

More Sensitive (1) Default (10) Less Sensitive (50)

Deleted immediately after processing. Never stored or shared.

How to Use Image Diff Tool

Upload Both ImagesSelect or drag and drop both images (JPG, PNG, WebP — max 10MB each)

Set SensitivityAdjust threshold — lower = more sensitive to small differences

CompareClick the button to see differences highlighted in red

Image Diff Tool — Compare Two Images Free — No Software Required

Compare two images side by side and see exactly where they differ. Pixel-by-pixel comparison highlights every changed area in red, making differences impossible to miss even in subtle changes. Developers use image diff for UI regression testing — automatically catching unintended visual changes when code is updated. Designers use it to compare original vs revised artwork. Print production teams use it to verify that proofs match originals. Quality control workflows use it to catch defects in product images. Upload both images, and differences are highlighted immediately.

Common Uses

UI regression testing to catch unintended visual changes
Compare original vs edited photos before and after
Quality control for print proof verification
Verify that two copies of the same image file are identical

100% Free — No Signup, No Watermark

Tooliby processes your image on our secure server and deletes it immediately after you download. Your images are never stored, never shared, and never used for any other purpose. No account creation, no email verification, no credit card. Just upload and use.

Frequently Asked Questions

Each pixel in both images is compared. Pixels that differ by more than a threshold are highlighted in red in the output. Identical pixels are shown in grayscale.

Both images are scaled to the same dimensions for comparison. Size differences in original dimensions are noted in the results.

UI regression testing (checking if a new build changed any screenshots), quality control for print materials, comparing edited vs original photos, and verifying that two copies of a file are identical.