How to Find and Delete Duplicate Photos in Google Photos

Content Overview:

• User Cases: Google Photos Backup Duplicates
• Why Google Photos Upload Duplicates?
• How to Find and Delete Duplicate Photos in Google Photos?
• How to Avoid Google Photos Duplicates Generating? 3 Tips
• Suggestions to Google Photos Backup App

User Cases: Google Photos Backup Duplicates

Why Google Photos Upload Duplicates?

To effectively find and remove duplicate photos in Google Photos, we first need to understand their origin. Let's examine the common causes behind duplicate uploads.

Core Reason: Google Photos Duplicate Detection Mechanism

Google Photos has built-in "identical duplicate detection", but that doesn't mean it always avoids duplicates. Understanding how it works is the key to solving the problem.

The Hash-Based Detection Process

Every photo you upload has a unique "hash" value —a digital fingerprint that identifies the file. When you upload a photo to Google Photos:

• Scan — When you upload a photo, Google Photos calculates its hash
• Check — The system compares this hash against all existing photos in your library
• Skip — If an exact match is detected, the upload is automatically blocked to prevent duplicates.

While hash-matching is effective for exact duplicates , it has one major blind spot: any modification changes the hash — even a single pixel edit, format conversion (PEG ↔ PNG), or metadata change creates a completely new hash, causing Google Photos to treat it as a different file.

This explains why you might still see similar photos in your library even though Google Photos has "duplicate detection."

Others Reasons for Duplicate Photos in Google Photos

While Google Photos' hash-based detection system works well for exact duplicates, several other factors can cause duplicates to slip through.

1: Using Outdated Upload Tools

One of the most frequent culprits behind duplicate photos is the use of discontinued or legacy upload tools. Older applications like Picasa, the original Desktop Uploader, and early versions of Backup and Sync handled file metadata differently than modern Google Photos.

When these legacy tools uploaded photos, they often modified the file's metadata during the process. Later, when you use current Google Photos tools to upload the same images, the modified metadata creates a different hash value, causing the system to treat them as entirely new files. This creates a frustrating cycle where the same photos keep reappearing in your library despite your best efforts to organize them.

2: Multi-Device Uploads

Uploading photos from multiple devices introduces another significant source of duplicates, with video files being especially vulnerable to this problem.

While photos uploaded from different devices like phones, computers, or network-attached storage systems generally avoid duplication due to consistent hash calculation, videos behave differently. The same video file uploaded from your phone and later from your computer will often result in two separate copies in your Google Photos library.

This discrepancy between photo and video handling stems from how different devices process and encode video metadata, leading to hash variations even when the visual content is identical.

3: Device Changes or System Reinstallation

Major changes to your digital environment can trigger widespread duplicate generation. When you acquire a new phone, purchase a new computer, reinstall your operating system, or upgrade your backup application, Google Photos treats these as entirely new upload sources.

The service rescans your entire photo collection and re-uploads historical photos because it cannot establish continuity between your old device configuration and the new one. This scenario is particularly problematic during phone upgrades, where users expect a seamless transition but instead find their entire photo history duplicated in the cloud.

4: RAW + JPEG Dual Format Shooting

Professional photographers and enthusiasts who use cameras with RAW shooting capabilities often encounter duplicates due to dual-format recording settings. Many high-end cameras are configured by default to save both RAW and JPEG versions of every shot simultaneously.

Since these are technically different file formats with distinct structures, Google Photos treats them as separate files rather than versions of the same image. The result is pairs of photos that look identical in your library but occupy twice the storage space. Disabling dual-format recording in your camera settings can prevent this issue at the source.

5: Google Drive Sync Settings

The integration between Google Drive and Google Photos, while designed for convenience, can inadvertently create duplicates.

When the sync feature between these services is enabled, photos stored in Google Drive automatically appear in Google Photos. If you subsequently upload the same photos directly to Google Photos through the app or website, you end up with two copies of each image.

This duplication occurs because the synced version from Drive and the manually uploaded version are treated as separate entities within the Google Photos system.

6: System Bugs or Network Issues

Occasional technical problems can also contribute to duplicate creation. Network interruptions during upload may cause the system to retry failed transfers, resulting in multiple copies. Application bugs in Google Photos, though rare, can cause sync errors. Additionally, rapidly switching between multiple Google accounts on the same device can confuse the synchronization process and lead to duplicate uploads.

How to Find and Delete Duplicate Photos in Google Photos?

Many users are unwilling to remove duplicates in Google Photos manually due to time-wasting. Unfortunately, there are only manual ways until now.

In the following parts, you will find 4 ways to help remove duplicate photos from Google Photos.

• Method 1. Remove Duplicates in Google Photos Manually
• Method 2. Use Identical Duplicate Detection With Google Photos
• Method 3. Google Photos Detect Duplicates - Search
• Method 4. Find and Remove Duplicates Google Photos through Third-Party Tools

Method 1. Remove Duplicates in Google Photos Manually

If the number of duplicate photos is not too much, you can try to delete these duplicates manually.

1. Log in to Google Photos official website.
2. Click on "Photos" in the left panel.
3. Find these duplicates, select photos that you don't need, and click on the "Delete" option.

Method 2. Use Identical Duplicate Detection With Google Photos

Google Photos can prevent some exact duplicate uploads automatically. When you upload a file, Google Photos may compare its file signature and metadata with existing items in your library. If the file is considered identical, the upload may be skipped automatically. However, edited versions, re-encoded videos, or files with modified metadata can still be uploaded as separate copies.

Method 3. Google Photos Detect Duplicates - Search

If duplicate photos were uploaded at different times, it may be easier to identify and remove them through the “Recently added” view in Google Photos Search (https://photos.google.com/search/_tra_). Items are generally sorted by upload date, allowing you to select photos in batches for review and deletion. 

Method 4. Find and Remove Duplicates Google Photos through Third-Party Tools

While Google Photos offers basic duplicate detection, third-party tools provide more powerful solutions for identifying and removing duplicates—especially for "near duplicates" that Google might miss. One of the most popular tools is Google Photos Duplicate Remover, a Chrome extension designed specifically for this purpose.

Step 1. Open the Chrome Web Store, search for "Google Photos Duplicate Remover" and click "Add to Chrome" to install the extension.

Step 2. Go to photos.google.com and sign in to your account. Click the extension icon in your Chrome toolbar. Select "Scan for Duplicates"- The tool will analyze your library and group identical/similar photos together.

Step 3. The extension will display duplicate groups and you can click the circle on the target photos to mark it for deletion.

Step 4. Once confirmation, marked photos will be moved to Google Photos’ trash folder.

How to Avoid Google Photos Duplicates? 3 Tips

Except for removing duplicate photos from Google Photos, you have another 3 tips for you to avoid duplicate photos in Google Photos:

• Tip 1. Get a Fresh Settings or Fresh Start to Any Software/Hardware Changes
• Tip 2. Upload Google Photos Manually
• Tip 3. Use Different Upload Methods

Tip 1. Get a Fresh Settings or Fresh Start to Any Software/Hardware Changes

Considering the causes of Google Photos upload duplicates, to avoid future Google Photos auto backup duplicates, users should:

• Keep backing up photos using the same local device client.
• Adjust the settings and only put the new photos or future photos to source folders when the client gets updated/reinstalled;
• Reset settings to put already uploaded items out of source folders when the local devices get renewed/reformatted or replaced;
• Avoid uploading the same photos via different devices (desktops, laptops, notebooks, or phones).

Tip 2. Upload Google Photos Manually

Just open Google Photos and upload new local photos by dragging and dropping or "Import Photos" button. 

Tip 3. Use Different Upload Methods

Since the troubles Google Photos has given you, if you are fed up with it, you can switch to other cloud drive services like Dropbox and OneDrive. They have their own file backup tool to upload local files to cloud storage.

Or, you can make use of third-party software that enables you to upload local items to cloud tasks such as MultCloud. MultCloud, as a FREE online multiple cloud storage manager, can help you not only upload local files (of course including photos/videos) to its supported clouds (around 40) like Google Drive, Google Photos, OneDrive, iCloud, Dropbox, etc., but also remote upload to Google Drive.

MultCloud also allows you to transfer/sync files among cloud drives directly as long as you add your clouds to MultCloud without using laborious uploading and downloading methods. For instance, sync pictures between OneDrive and Google Photos.

Following any way above can help you delete duplicate photos in Google Photos. This article not only guides you on how to remove duplicates in Google albums but also provides free ways to avoid Google Photos duplicates generating. In general, it is very useful for us to manage photos stored in Google Photos.

Suggestions to Google Photos App

Many users have given their opinions about how to remove duplicates from Google Photos. They insist that Google should implement an ACTUAL duplicate detection to detect duplicated photos. When a photo is being uploaded but Google Photos finds it's the same as one of the photos uploaded previously, the Google Photos app will ask the user to decide whether to keep/merge (keeping the largest/most recent photo) or delete all duplicates.

If there are already duplicates in the cloud, Google Photos should give a function to search out all duplicates and delete them. This actual duplicate detection can detect files of the same content but in different file names, different upload dates, uploads by different clients, uploads from different local devices, etc. If you resolve the Google Photos duplicated photos, you can also move OneDrive Photos to Google Photos if you like.