The free space on my Windows 11 laptop becomes much less and only 5GB is available. As far as I know, there are many duplicate files especially the photos imported from my Android phone. I guess it is quite effective way to get more free storage by removing the photo duplicates.However, it is impossible for doing this manually. Does anyone know a good duplicate image finder that works on Windows 11? I tried 2 free ones but only dozens of duplicate photos are found and this doesn't do any help for my situation.Best Regards,Natalie

If you want to check if two images are exactly identical (same format, dimensions, and pixel data), you can:Compare file hashes (MD5, SHA-1, SHA-256) Compare pixel-by-pixel (for uncompressed formats like BMP, PNG, or TIFF)An exact comparison checks whether two files (like images) are completely identical at the binary level, meaning every single byte matches. You don't need any duplicate photos finder app with this trick. This is the strictest form of comparison and is useful when you need to confirm that two files are true duplicates (same content, format, metadata, and compression).How It WorksBinary-Level Check: The comparison examines the raw bytes of the files. If even one bit differs, the files are considered non-identical. No additional duplicate image finder tool required with this method.Common Techniques:File Hashing (MD5, SHA-1, SHA-256): A hash function generates a unique fingerprint (hash) of the file. If two files have the same hash, they are bit-for-bit identical.Direct Byte Comparison: Read both files byte-by-byte and check for mismatches.Best for:1. Verifying unmodified copies (e.g., backups, downloaded files).2. Detecting true duplicates (e.g., duplicate photos with identical metadata).

Hey! If you're looking for a duplicate image finder for Windows 11 PC, I’ve played around with a few, and I can suggest some decent options that won’t cost you a dime.One of the best duplicate image finder tools I’ve used and liked is VisiPics. It’s pretty straightforward—scans your folders, finds similar or identical images, and helps you delete the duplicates easily. It’s not fancy, but it gets the job done and is lightweight. The only thing is, it’s a bit old-school looking, but hey, it’s free and works well.Another good one is Duplicate Cleaner Free. It’s a bit more polished, with options to scan specific folders, compare images by size, content, or metadata. I’ve used it a few times to clear up clutter, and it’s pretty reliable. Plus, it supports different image formats, which is a plus.From my experience, just be careful when deleting—double-check the duplicates before hitting delete, especially if you’re scanning folders with important images. Sometimes, the tools might flag similar-looking images that you actually want to keep.

Diving into duplicate photo finders on Windows 11? Been there, done that. These duplicate photo finders tools can be a bit too eager. Sometimes they flag similar but different photos as duplicates — like a slightly edited version or a different crop. So, always double-check before mass-deleting. I once accidentally nuked a bunch of family photos because the software thought they were duplicates! Some programs have a quick scan mode that skips over some files or uses less thorough algorithms. It’s faster but riskier. I learned the hard way that you should run a 'deep' or 'full' scan at least once to catch everything.If your photos are scattered across external drives, cloud folders, or different partitions, make sure the tool scans all those locations. Otherwise, you might miss duplicates hiding in some corner.Many duplicate photo finders tools let you tweak how similar photos need to be before they’re considered duplicates. Crank it too low, and you’ll get a lot of false positives; too high, and you might miss actual duplicates. Play around with settings first.

Powershell has a built-in feature for finding duplicate images on any Windows 11/10/8/7 computer. You can run the following script to remove the duplicate files with installing duplicate image finder software:import cv2 import numpy as np from skimage.metrics import structural_similarity as ssim def compare_images(img1_path, img2_path): img1 = cv2.imread(img1_path) img2 = cv2.imread(img2_path) if img1.shape != img2.shape: print("Different dimensions!") return False # Convert to grayscale for SSIM gray1 = cv2.cvtColor(img1, cv2.COLOR_BGR2GRAY) gray2 = cv2.cvtColor(img2, cv2.COLOR_BGR2GRAY) # Compute SSIM ssim_score = ssim(gray1, gray2) print(f"SSIM Score: {ssim_score}") # Closer to 1 means more similar # Compute MSE mse = np.mean((img1 - img2) ** 2) print(f"MSE: {mse}") # Lower means more similar # Thresholds (adjust based on needs) if ssim_score > 0.95 and mse < 10: return True # Likely duplicates else: return False is_duplicate = compare_images("image1.jpg", "image2.jpg") print("Are duplicates:", is_duplicate)

Most free duplicate image finder are pretty good at catching exact copies, but if you’ve got slightly edited photos, resized images, or different formats (say, a PNG vs. a JPEG), they might not spot those as duplicates. So, you might think your storage is still cluttered with duplicates, but the tool missed some. Sometimes, especially with free or basic tools, they can flag images that are different but look similar, or vice versa. I’ve had situations where a “duplicate” was actually a different shot or edited version, and deleting it would’ve been a mistake. Always double-check before hitting delete!Scanning thousands of photos can take a while, especially if the app compares images pixel-by-pixel or uses complex algorithms. It can slow down your PC temporarily. If your system isn’t super powerful, expect some lag. Many free duplicate finders have restrictions—like only scanning certain folders, or limited number of duplicates detected. To get the full power, you might have to pay or upgrade.Duplicate image finders often focus on content but may ignore metadata differences. If you want to keep photos organized by date or camera info, some duplicates might slip through or be wrongly flagged. Most free tools compare files strictly—either by hashes or byte-by-byte. They won’t find visually similar images that aren’t byte-for-byte identical. So, if you have multiple versions of the same photo edited differently, you might need a more advanced tool (like VisiPics or a content-aware app).

What is the best duplicate image finder for Windows 11?

14 Replies

JosiahTurner
Silver Contributor
May 15, 2025
If you want to check if two images are exactly identical (same format, dimensions, and pixel data), you can:
Compare file hashes (MD5, SHA-1, SHA-256)
Compare pixel-by-pixel (for uncompressed formats like BMP, PNG, or TIFF)
An exact comparison checks whether two files (like images) are completely identical at the binary level, meaning every single byte matches. You don't need any duplicate photos finder app with this trick. This is the strictest form of comparison and is useful when you need to confirm that two files are true duplicates (same content, format, metadata, and compression).
How It Works
Binary-Level Check: The comparison examines the raw bytes of the files. If even one bit differs, the files are considered non-identical. No additional duplicate image finder tool required with this method.
Common Techniques:
File Hashing (MD5, SHA-1, SHA-256): A hash function generates a unique fingerprint (hash) of the file. If two files have the same hash, they are bit-for-bit identical.
Direct Byte Comparison: Read both files byte-by-byte and check for mismatches.
Best for:
1. Verifying unmodified copies (e.g., backups, downloaded files).
2. Detecting true duplicates (e.g., duplicate photos with identical metadata).
- cindylouwho1962
  Copper Contributor
  Aug 04, 2025
  I'm a bit lost on the instructions. Can you please be more descriptive?
TristanLewis
Iron Contributor
May 15, 2025
Hey! If you're looking for a duplicate image finder for Windows 11 PC, I’ve played around with a few, and I can suggest some decent options that won’t cost you a dime.
One of the best duplicate image finder tools I’ve used and liked is VisiPics. It’s pretty straightforward—scans your folders, finds similar or identical images, and helps you delete the duplicates easily. It’s not fancy, but it gets the job done and is lightweight. The only thing is, it’s a bit old-school looking, but hey, it’s free and works well.
Another good one is Duplicate Cleaner Free. It’s a bit more polished, with options to scan specific folders, compare images by size, content, or metadata. I’ve used it a few times to clear up clutter, and it’s pretty reliable. Plus, it supports different image formats, which is a plus.
From my experience, just be careful when deleting—double-check the duplicates before hitting delete, especially if you’re scanning folders with important images. Sometimes, the tools might flag similar-looking images that you actually want to keep.

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What is the best duplicate image finder for Windows 11?

14 Replies

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