How to split a ZIP file into parts
Split a large ZIP archive into smaller, independently valid ZIP files by target size, right in your browser.
Email attachments and some services impose size limits. Splitting a large ZIP into smaller parts makes it shareable again. Aback ZIP splits archives into independently valid ZIP files, never arbitrary byte chunks.
1. Add the archive
Drop the large ZIP into the Split ZIP tool. The tool reads the archive structure so it can pack entries into parts intelligently.
2. Set the target size
Choose a preset like 10 MB or 100 MB, or enter a custom size in MB or GB. The tool shows the estimated number of parts before you start.
3. Split and download
Click Split ZIP. Every part is a complete, independently extractable ZIP archive named like archive.part01.zip. Download all parts and share them however you like.
A note on part sizes
Target size is approximate: each part carries its own headers and central directory, so real sizes usually land within a few percent of the target. A single file larger than the target gets its own part.
Frequently asked questions
Are the split parts real ZIP files?
Yes. Each part is an independently valid ZIP archive you can open and extract on its own.
Are my files uploaded when splitting?
No. Splitting happens locally in your browser with zero network activity involving your data.