ReduceZip

Upload your ZIP file

Drag & drop or click to browse · max 4 GB

Your files are secure and private. They are deleted after processing.

Compress your ZIP files even further

A standard ZIP has many different levels of compression and it doesn't necessarily compress everything inside it as aggressively as possible. ReduceZip opens your archive, re-compresses every image, video, PDF, PowerPoint, and Excel file it finds, and repacks the whole thing. The result is the same ZIP, just smaller.

How it works

  1. 1

    Upload your ZIP

    Drop or select any ZIP file up to 1 GB. Your file is uploaded directly and securely, no third-party servers.

  2. 2

    Choose a compression level

    Set compression from 0 to 10. Higher values prioritize the smallest ZIP, while lower values preserve more detail.

  3. 3

    We compress every file inside

    Images, videos, PDFs, PowerPoint files, and Excel workbooks are recompressed. Everything else is re-packed with maximum DEFLATE compression.

  4. 4

    Download the result

    Once done, you get a fresh ZIP ready to download. Files are automatically deleted from our servers after 15 minutes.

FAQ

What types of files can I compress?
ReduceZip compresses ZIP archives. Inside the archive it re-encodes images (JPEG, PNG, GIF), videos (MP4, MOV, AVI, MKV, WMV), PDFs, PowerPoint files, and Excel workbooks. All other file types are re-packed with maximum DEFLATE compression, which often shrinks them as well.
How much smaller will my ZIP get?
It depends entirely on what's inside. A ZIP full of high-resolution JPEG photos can shrink by 90 %. A ZIP of already-compressed files (datasets, text files) may see little to no size reduction.
Is my file safe and private?
Your file is uploaded directly to a private cloud storage bucket over HTTPS. We never inspect the contents beyond what's needed to compress it. Files are automatically deleted after 15 minutes.
What is the maximum file size?
The maximum upload size is 1 GB per file.
Is ReduceZip free?
Yes, completely free with no account required.
What does the compression level do?
It controls how aggressively ReduceZip recompresses media and PDFs inside the archive. A value of 10 aims for the smallest output, while 0 keeps the highest fidelity and applies lighter compression.