The fastest way depends on what device you're using
Deleting duplicate images by hand takes hours. Most phones and computers have built-in tools or free programs that find and remove duplicates in minutes. On iPhone, you use the Photos app's recently deleted folder and manual review. On Android, Google Photos has a built-in duplicate finder. On Windows, you can use the Photos app or a free program like Gemini Photos. On Mac, the Photos app works similarly to iPhone.
The method you choose depends on how many duplicates you have and whether you want to review each one before deletion. If you have hundreds of duplicates, a dedicated tool is faster. If you have a few dozen, the built-in phone or computer app usually works fine.
Key Takeaways
- Google Photos on Android finds duplicates automatically and shows them grouped together, so you can delete multiple copies at once.
- iPhone's Photos app does not have a dedicated duplicate finder, but you can manually review similar photos in the "Recently Added" view and delete from there.
- Windows 10 and 11 Photos app has a duplicate detection feature under Settings that flags similar images for review.
- Free desktop programs like Gemini Photos and Duplicate Photo Cleaner scan your entire computer and find duplicates across all folders in one pass.
- Always review flagged duplicates before deleting, because some programs mistake similar photos for exact copies.
How to find duplicates on Android with Google Photos
Open Google Photos on your Android phone. Tap the menu icon (three horizontal lines) in the bottom right, then tap "Settings." Scroll down and tap "Storage." Google Photos will show you a section called "Duplicates" if it has found any. Tap on it to see all the duplicate groups.
Each group shows the duplicate images stacked on top of each other. Tap on a group to expand it and see all the copies. Select the ones you want to delete — usually you keep the highest quality version and delete the rest. Tap the trash icon to delete the selected images. Google Photos will move them to your trash folder, where they stay for 30 days before permanent deletion.
If you do not see a Duplicates section, Google Photos may not have found any, or the feature may not be available in your region yet. In that case, you can manually look through your photos and delete obvious duplicates yourself, or use a third-party app like Gemini Photos.
How to find duplicates on iPhone with the Photos app
iPhone's built-in Photos app does not have an automatic duplicate finder, but you can find duplicates manually by looking at photos taken in quick succession. Open the Photos app and tap "Library" at the bottom. Tap "Recently Added" to see your newest photos in order.
Scroll through and look for photos that appear identical or nearly identical and were taken seconds apart. These are usually duplicates created when you held down the shutter button or when the phone saved a photo twice by accident. Tap "Select" in the top right, then tap each duplicate you want to delete. Tap "Delete" and confirm.
If you have many duplicates, consider using a Mac with the Photos app instead — the Mac version has better tools for finding similar images. You can also use a third-party app like Gemini Photos, which works on both iPhone and iPad and scans your entire photo library automatically.
How to find duplicates on Windows with the Photos app
Open the Photos app on Windows 10 or 11. Click the menu icon (three dots) in the top right and select "Settings." Scroll down to "Duplicate detection" and toggle it on. The Photos app will scan your Pictures folder and any other folders you have added to the app.
Once the scan is complete, go back to the main Photos view. You should see a section for duplicates, or the app will show you flagged images. Review each group and select the copies you want to delete. Click the trash icon to delete them. The deleted images go to your Recycle Bin, where you can recover them if you change your mind.
The built-in Photos app works well for small to medium libraries. If you have thousands of photos across multiple folders on your hard drive, a dedicated program like Gemini Photos or Duplicate Photo Cleaner will be faster because they scan your entire computer at once, not just the Pictures folder.
How to find duplicates on Mac with the Photos app
Open the Photos app on your Mac. Click "Photos" in the menu bar at the top, then click "Preferences." Click the "General" tab. Look for an option related to duplicate detection — on newer versions of macOS, this may appear as a setting to automatically remove duplicates or as a view option.
If your version of Photos does not have built-in duplicate detection, you can use the search function to find similar photos. Click the search icon and type the date or location of photos you suspect are duplicates. Review the results and manually delete copies you do not need.
For a more thorough scan, use a third-party app like Gemini Photos or Duplicate Photo Cleaner. These programs scan your entire Mac, including the Photos library, and group duplicates by similarity. You can then review and delete in bulk.
Using a dedicated duplicate finder program
If your phone or computer's built-in tools do not find all your duplicates, or if you want a faster scan, download a free program like Gemini Photos, Duplicate Photo Cleaner, or VisiPics. These programs scan your entire device or computer, not just one folder, and can find duplicates across different file formats and quality levels.
Download and install the program, then open it and select the folders you want to scan. Click "Scan" and wait for the program to finish. It will show you groups of duplicate images. Review each group carefully — some programs flag similar photos as duplicates even if they are not exact copies. Select the duplicates you want to delete and click the delete button. Most programs move deleted images to your trash or recycle bin first, so you can recover them if needed.
Free versions of these programs usually have limits on how many duplicates you can delete per day or how many folders you can scan. If you have a very large photo library, you may need to run the program multiple times or upgrade to a paid version.
What to do before you delete
Before you delete any duplicates, make sure you have a backup of your photos. If something goes wrong during deletion, you want to be able to recover them. Back up your phone to iCloud, Google Drive, or another cloud service. Back up your computer to an external hard drive or cloud storage.
Review the duplicates the program has flagged before you delete them. Some programs make mistakes and flag photos that are similar but not identical — for example, two photos of the same person taken a second apart. If you are not sure whether a photo is a true duplicate, keep it. You can always delete it later.
Start with a small batch of duplicates to make sure the program is working correctly. Delete a few, check that they are gone, and then delete the rest. This way, if something goes wrong, you have not lost all your photos at once.
Frequently Asked Questions
Will deleting duplicates free up storage space on my phone?
Yes. Each duplicate image takes up storage space, even if it is identical to another copy. Deleting duplicates can free up gigabytes of space, especially if you have hundreds of them. The amount of space you free up depends on the size of the images — high-resolution photos take up more space than low-resolution ones.
Can I recover a duplicate image after I delete it?
Yes, for a limited time. Most phones and computers move deleted images to a trash or recycle bin folder first, where they stay for 30 days before permanent deletion. You can open the trash folder and restore the image if you change your mind. After 30 days, the image is permanently deleted and cannot be recovered unless you have a backup.
What if the duplicate finder marks photos as duplicates when they are not?
Always review the flagged duplicates before deleting. If you see two photos that look different to you, do not delete them. Some programs use similarity matching and may flag photos taken seconds apart as duplicates even if they are slightly different. When in doubt, keep the photo.
Do I need to pay for a duplicate finder program?
No. Free programs like Gemini Photos, Duplicate Photo Cleaner, and VisiPics work well for most people. Paid versions usually offer faster scanning, more customization options, or the ability to delete more duplicates per day. For a typical photo library, the free version is enough.
Will deleting duplicates affect my cloud backup?
It depends on how your cloud service works. If you delete a photo from your phone and your phone is set to automatically back up to Google Photos or iCloud, the deletion may sync to the cloud and delete the backup copy too. Check your cloud service's settings before deleting duplicates. Some services let you keep deleted photos in the cloud for a set period before removing them permanently.