iPhone doesn't have a built-in compress tool, but you can create a ZIP file using the Files app or Mail

iPhones don't come with a dedicated compression app like Windows or Mac computers do. Instead, you use the Files app (which comes pre-installed) to create a ZIP archive, or you can compress files through Mail when you're sending something. Both methods create a standard ZIP file that any device can open later.

The Files app method works for any file type and any number of files. The Mail method is faster if you're already sending the file to someone, but it only compresses what you're attaching in that moment.

Key Takeaways

  • Open the Files app, find the file or folder you want to compress, tap and hold it, then tap "Compress" from the menu.
  • A new ZIP file appears in the same folder with the same name plus ".zip" at the end.
  • If you're sending a file by Mail, you can compress it during the attachment step by tapping and holding the file before you send.
  • ZIP files created on iPhone work on Windows, Mac, Android, and any other device — you don't need special software to open them later.

Compress a single file or folder using the Files app

Open the Files app (the folder icon on your home screen). Navigate to the file or folder you want to compress. This could be a photo, document, PDF, or any folder containing multiple files.

Tap and hold the file or folder until a menu appears. You'll see options like "Copy", "Move", "Duplicate", and others. Look for "Compress" in that menu and tap it. A new file with the same name plus ".zip" will appear in the same location within seconds.

The original file stays where it is — compression creates a copy, it doesn't replace the original. You now have both the original and the compressed version.

Compress multiple files at once

If you need to compress several files together, use the Files app's multi-select feature. Open Files and navigate to the folder containing the files you want. Tap "Select" in the top right corner (or tap and hold one file to start selecting).

Tap each file you want to include. You'll see a checkmark appear next to each one. Once you've selected all the files you need, tap "Compress" at the bottom of the screen. The Files app creates a single ZIP archive containing all of them.

If the files are in different folders, you'll need to compress them one folder at a time, or move them into a single folder first, then compress that folder.

Compress a file while sending it through Mail

Open Mail and start a new message or reply. Tap in the message body, then tap the attachment icon (a paperclip). Select the file you want to attach. Before you tap "Insert", look for the file in the attachment preview — tap and hold it.

A menu will appear with the option to "Compress". Tap it, and the file will be compressed into a ZIP before it attaches to your email. This is useful if you're sending a large file to someone and want to reduce the size before it leaves your phone.

This method only works for files you're actively sending in that email. If you need to keep a compressed version on your phone for later, use the Files app method instead.

Where to find your compressed file

When you compress a file using the Files app, the ZIP file appears in the same folder as the original. Look for a file with the same name but ending in ".zip". If you compressed a folder called "Photos", you'll see a file called "Photos.zip" right next to it.

You can move the ZIP file to a different location, delete the original if you no longer need it, or send the ZIP file to someone else. The ZIP file is a complete, independent copy — deleting the original won't affect it.

Opening a ZIP file you received on iPhone

If someone sends you a ZIP file, it arrives in Mail or Messages like any other attachment. Tap and hold the ZIP file, then tap "Save to Files". Choose the folder where you want it to save.

Once it's in the Files app, tap the ZIP file. iPhone automatically extracts it — the contents appear in the same folder. You'll see both the ZIP file and the extracted files. You can delete the ZIP once you've confirmed the extracted files are what you need.

Why the file size might not change much

Photos, videos, and audio files are already compressed by their format (JPEG, MP4, AAC). Creating a ZIP around them won't make them much smaller — sometimes only 5 to 10 percent smaller, or not at all. ZIP compression works best on text files, documents, and spreadsheets, which can shrink by 50 percent or more.

If you're compressing a photo album or video folder mainly to send it to someone, the ZIP file is still useful because it bundles everything into one file instead of many. But don't expect a dramatic size reduction.

Frequently Asked Questions

Can I password-protect a ZIP file on iPhone?

The Files app doesn't have a built-in password option. To create a password-protected ZIP, you'll need a third-party app like Archive Utility or WinZip. Once created, the password-protected ZIP works on any device that supports encrypted archives.

What happens to the original file after I compress it?

The original file stays exactly as it is. Compression creates a new copy in ZIP format. You can delete the original if you want to save space, but the ZIP file is independent and won't be affected.

Can I compress files stored in iCloud Drive?

Yes. Open the Files app, navigate to iCloud Drive, find the file or folder, tap and hold it, and tap "Compress". The ZIP file is created in iCloud Drive and syncs across your devices.

Will the ZIP file work on Android or Windows?

Yes. ZIP is a standard format that works on every device — iPhone, Android, Windows, Mac, and Linux. Anyone can open it without special software.

How do I know if a file is already compressed?

Files ending in .zip, .rar, .7z, or .gz are already compressed. Photos ending in .jpg or .png, and videos in .mp4, are compressed by their format but aren't archives. You can still create a ZIP around them, but the size won't shrink much.