Scan a folder or drive, find duplicate files and shrink photos and videos in bulk. See what fills your disk. Runs in your browser, nothing is uploaded.
Folder Cleaner looks through a folder or a whole drive on your computer and helps you win back space in three ways. The overview shows the total size and number of files, how much room images, video, audio, documents and archives take, the 50 biggest files and the folders that weigh the most. The scan counts live as it goes and can be stopped at any time, and hidden and system folders are skipped unless you ask for them.
The image compressor lists your JPEG, PNG and WebP photos (and AVIF when your browser can open it). Filter by size or folder, choose to keep the format or save as JPEG or WebP, set the quality, cap the width and height, and decide whether camera details and location are removed. Preview one image before and after, then run the whole batch on several background threads so the page stays smooth. A result is only kept when it is actually smaller. Videos in MP4 and MOV can be made smaller in the same step: choose a size (keep, 4K, 1080p or 720p) and a quality, and each clip is re-encoded as MP4 with your computer's video hardware, audio included. By default the new files go into a "_compressed" folder next to the originals; you can also replace the originals after a confirmation, or download everything as a ZIP.
The duplicate finder groups files by size first and only reads files that share a size, comparing a SHA-256 fingerprint of their contents. Big files are read in pieces, so memory stays low even for videos. An optional similar-image search also catches photos that were resized or saved again. Each group shows thumbnails, paths, sizes and dates; one click keeps the newest, oldest or shortest-path copy in every group, and you can change any tick by hand. Ticked copies are moved into a "_duplicates" folder for you to review, or deleted for good after a clear warning.
Privacy: everything runs in your browser on your own computer. No file, file name or folder path is uploaded or sent to a server.
Browser support: current desktop browsers that offer folder access can open a folder and save results straight back into it. Other desktop browsers open the folder in read-only mode: you still get the overview, the compressor (results come as a ZIP download) and the duplicate list (exported as a CSV file). Phones and tablets generally do not allow web pages to open whole folders.
No. The folder is read by your browser on your own computer and all compressing and comparing happens there. Nothing is sent to a server.
Scanning only needs to read the folder. Edit permission is asked for separately, only when you save compressed images or move or delete duplicates, so a plain scan can never change anything.
Not unless you choose to. The default saves smaller copies into a "_compressed" folder and leaves the originals alone. Replacing originals needs an extra confirmation, and an image is only replaced when the new file is smaller.
Yes. MP4 and MOV videos in the chosen folders are listed under Videos in the Reduce size tab. Each one is decoded and re-encoded as an MP4 at the size and quality you pick, with the sound kept, using your computer's video hardware. The preview shows an estimate before you start. Keep camera originals recorded in 10-bit or a log profile if you plan to colour-grade them, since a smaller copy has less room for grading.
Yes. Click any file in the Reduce size list and the Details section shows what is stored inside it: camera and lens, shutter, aperture, ISO, date taken, GPS location, author, copyright and editing software for photos and RAW files, and format, resolution, frame rate, bitrate, length, audio, recording date, location and device for videos. A note appears when a file holds a location, and Copy details puts everything on the clipboard.
Files with different sizes can never be identical, so only files that share a size are read. Their contents are compared with a SHA-256 fingerprint, first on the start and end of the file and then on the whole file, so two files are only grouped when their bytes match.
It builds a tiny 64-bit picture fingerprint for each photo and groups photos whose fingerprints are close, which catches copies that were resized, re-saved or slightly edited. Because similar is not the same as identical, these groups are not ticked automatically unless you turn that on.
No. Permanent delete skips the recycle bin. If you are unsure, use the default move option: the copies go into a "_duplicates" folder that you can check and then delete yourself.
Browsers block some places, such as the top of a system drive or your whole user folder, because they hold system files. Pick a subfolder instead, for example Pictures, Documents or a project folder.
Yes. Folders with 100,000 files or more can be scanned, and long lists only draw the rows on screen. You can stop a scan early and still see what was found so far.
Current desktop browsers with folder access support can. Others work in read-only mode, where compressed images download as a ZIP and the duplicate list downloads as a CSV file. Phones and tablets usually cannot open folders at all.
Yes. Sketch Studio has a Folder Cleaner mode in its Studio Mode bar that opens this same tool, so you can tidy up a folder of photos and videos without leaving your design workspace.