Local ZIP compression • No upload • Compress in browser

ZIP Compressor

Compress files and folders into ZIP archives locally in your browser. Fast, private compression with adjustable levels and folder structure support.

What this ZIP compressor does

This tool compresses files and folders into ZIP archives directly in your browser. It is useful for packaging files for sharing, reducing file sizes for email, and organizing content into archives without installing desktop compression software.

How to compress files into a ZIP archive

  1. 1.Select files or folders to compress
  2. 2.Choose compression level and options
  3. 3.Start the compression in your browser
  4. 4.Download the generated ZIP archive

Why use this browser ZIP compressor

All compression runs locally in your browser — files never leave your device

Supports folder compression with original directory structure preserved

Adjustable compression level from fastest to smallest output

No desktop software installation required

ZIP compressor FAQ

Are my files uploaded during compression?

No. All compression is processed locally in your browser so your files never leave your device.

Can I compress entire folders?

Yes. You can add entire folders and the tool will compress them recursively, preserving the original directory structure in the ZIP archive.

What compression levels are available?

You can choose from level 0 (fastest, no compression) to level 9 (smallest output). Level 6 is the default and offers a good balance between speed and file size.

Is there a file size limit for compression?

There is no hard file size limit. The tool uses streaming compression, so it can handle large files efficiently without consuming excessive memory.

Can I pause and resume compression?

Yes. The compression process supports pause, resume, and cancel controls, so you can manage long-running tasks without losing progress.

What does the root directory option do?

When enabled, the tool wraps all compressed files under a single root folder inside the ZIP. When disabled, files are placed directly at the archive root.