Split ZIP Archive

Divide large ZIP archives into smaller, manageable parts for email attachments or cloud upload limits. Includes SHA-256 manifests and terminal reassembly scripts.

Select ZIP Archive to Split

Works 100% in-browser without uploading

No Remote Uploads

Gigabyte-scale archives are sliced directly on your CPU using browser stream readers. Your private files are never uploaded over the internet.

1-Click Rejoin Scripts

Provides copy-paste reassembly commands for Windows PowerShell, Command Prompt, macOS Terminal, and Linux to stitch parts back together in 2 seconds.

Bypass Attachment Caps

Easily slice files for Gmail (25MB limit), Discord (25MB/50MB limit), Microsoft Teams, or upload limits on online university assignment portals.

What Is the Free Online Split ZIP Tool and What Does It Solve?

Sending a huge file—such as a 150 MB video edit, a 300 MB CAD design, or an entire project directory—frequently runs into brick walls. Email services like Google Mail, Yahoo, and Outlook categorically bounce attachments larger than 25 MB. Discord caps free uploads, and older FAT32 USB sticks cannot store any file greater than 4 GB.

PDFriend's Split ZIP Archive solves this in plain, practical terms. It acts like a digital paper cutter for your files: you drop in your large ZIP archive, choose your maximum part size (e.g., 25 MB per chunk), and the tool cleanly dices the archive into sequentially numbered volumes (.part1.zip, .part2.zip). It also creates an automated script so the recipient can merge the parts back into the original archive with a single terminal command or via our free online Merge ZIP tool!

How to Split a Large ZIP File in 4 Simple Steps

  1. 1Upload Your Big ArchiveDrag and drop your large .zip file into the splitter.
  2. 2Pick Maximum Chunk SizeChoose 10 MB (Email safe), 25 MB (Gmail cap), 50 MB (Discord), or type a custom megabyte size.
  3. 3Slice in MemoryClick "Split Archive" to calculate byte boundaries and generate cryptographic SHA-256 hashes.
  4. 4Download Parts & ScriptsDownload the individual chunks or grab the JSON manifest and copy-paste rejoin script.

Popular Everyday Use Cases

  • Gmail & Outlook Attachments: Split 60 MB archives into three 20 MB parts that bypass email gateway attachment size limits.
  • Chat & Messaging Platforms: Send large video project files through Discord or Slack without paying for expensive nitro or enterprise tiers.
  • FAT32 Formatted Drives: Break down 8 GB virtual machine disk images to fit within the 4 GB file size limit of older USB drives.
  • Academic & Course Portals: Submit university capstone code projects where assignment portals enforce a strict 20 MB cap.

Frequently Asked Questions (FAQ)

How does the recipient rejoin split ZIP files?

They can either upload all the split parts to our free online Merge ZIP tool, or paste the provided 1-line command into their Windows PowerShell (cmd /c copy /b ...) or Mac/Linux Terminal (cat ... > archive.zip).

Will splitting a ZIP archive corrupt any files inside?

No. Slicing occurs at precise binary byte offsets. Recombining the parts recreates the exact original file byte-for-byte, verified by matching SHA-256 cryptographic hashes.

Are my files uploaded to your servers during splitting?

Never. The slicing engine processes file slices entirely in local browser memory via the File Slice API. No data is transmitted to our servers.