Windows · Guide
How to Compress Files on Windows
Short answer
Right-click any file or folder in File Explorer and choose Compress to ZIP file to create a ZIP archive with no extra software. For higher compression or other formats, install 7-Zip.
Requirements
- Windows 11 or Windows 10
- The files or folder you want to compress
- Optional: 7-Zip, WinRAR, or Bandizip for better compression or more formats
Steps
1. Select the files or folder
Select one or more items in File Explorer, or a single folder to compress its whole contents.
2. Right-click and compress
In Windows 11, right-click and choose Compress to ZIP file. On Windows 10, right-click, choose Send to, then Compressed (zipped) folder.
3. Rename the archive
Windows names the new .zip file after the first item selected. Rename it before sending it anywhere.
4. Use 7-Zip for smaller archives
Install 7-Zip, right-click the same items, and choose 7-Zip > Add to archive to pick a stronger compression level or the 7z format.
5. Set a compression level
In the 7-Zip dialog, set Compression level to Ultra for the smallest file size, though it takes longer to create.
6. Add a password if needed
In the same 7-Zip dialog, enter a password and choose AES-256 encryption before clicking OK.
Alternative methods
1. Use 7-Zip for the 7z format
7z archives are typically 10-30% smaller than ZIP for the same files, at the cost of universal compatibility.
2. Use PowerShell
Run Compress-Archive -Path C:\Folder -DestinationPath C:\archive.zip in PowerShell to script the process.
Troubleshooting
The compressed file is barely smaller than the original
Already-compressed files such as JPEGs, MP4s, or existing ZIPs do not shrink much further, regardless of the tool used.
Compress to ZIP file option is missing
This can happen if the ZIP file type association was changed. Reinstalling or repairing via Windows Features can restore it, or use 7-Zip instead.
The ZIP file is too large to email
Split it into smaller volumes using 7-Zip's Split to volumes option, or upload it to cloud storage and share a link.
Frequently asked questions
Does compressing a file reduce its quality?
No. ZIP and 7Z compression is lossless — every byte is restored exactly on extraction.
What is the difference between ZIP and 7Z?
ZIP is universally supported and fast; 7Z usually compresses smaller and supports stronger encryption but needs 7-Zip or a compatible tool to open.
Can I add more files to a ZIP later?
Yes. Drag additional files onto an existing ZIP in File Explorer, or use 7-Zip's Add to archive on the existing file.