Split ZIP Archive into Fixed Parts
Slice large ZIP archives into exact multi-part chunks for email limits and FAT32 drives, and reassemble them client-side.
- 100% free
- Files stay on your device
- No sign-up, no watermark
Select ZIP Archive to Split
Choose a ZIP file of any size to slice into fixed-size chunks.
What is Split ZIP Archive into Fixed Parts?
Split ZIP cuts a large archive into equal-sized parts so it fits email attachment limits, FAT32 drives, upload caps or chat apps. Choose a preset part size — 1, 5, 10, 25, 50, 100, 250 or 500 MB — or enter a custom size, then pick a naming scheme: standard numbered parts (archive.zip.001, .002…) or multi-volume names (archive.z01, .z02… .zip). The second tab, Reassemble & Verify, joins the parts back into the original file in the right order. Splitting is a byte-level cut, so the joined file is identical to the original.
How to use Split ZIP Archive into Fixed Parts
- 1
Choose the file
Upload the ZIP (or any large file) you want to split.
- 2
Pick a part size and naming
Select a preset such as 25 MB for email, or set a custom size, and choose .zip.001 or .z01 style names.
- 3
Download the parts
Split the file and download each part. Use Reassemble & Verify to join them again later.
Frequently asked questions
How do I open the split parts?
Use the Reassemble & Verify tab to join them back into the original file, or 7-Zip on Windows (open the .001 file). The parts must all be present and unchanged.
What part size should I use for email?
Most email providers cap attachments at 20–25 MB, so choose the 25 MB preset for Gmail or 20 MB (custom) for Outlook.
Does splitting damage or recompress the archive?
No. The file is cut into byte ranges without recompression, so joining the parts restores an exact copy.
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