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Split a Large File into ZIP Parts

Cut one big file into ZIP parts of the size you pick, so each part fits an email or upload limit.

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We’re finishing this tool. Leave your email and we’ll tell you the day it goes live.

About Split ZIP

Split ZIP is for files that are too big to send in one piece. Gmail stops at 25 MB per email, many work mailboxes and upload forms allow even less, and a long video, a design file or a zipped project folder easily goes over. Set a part size, 20 MB by default, and we pack the file into numbered ZIP volumes that each stay under it.

Send the parts in separate emails or upload them one at a time. The recipient saves every part in the same folder and opens the set with an archive app such as 7-Zip; all parts are needed to get the file back. Free accounts can split files up to 50 MB, VIP up to 1 GB.

How to use Split ZIP

  1. 1
    Upload your large file

    Choose or drop the file you want to split. Any file type works.

  2. 2
    Set the part size

    Enter the Part size in MB. It starts at 20 MB; set it lower if your mail server or upload form has a smaller limit.

  3. 3
    Click Split ZIP

    We pack the file into ZIP volumes on our server, none of them larger than the size you set.

  4. 4
    Download all the parts

    Save every part. The recipient needs the complete set to unpack the file.

Why use Cubfile for this

  • Part size you choose

    Enter any size in megabytes to match a mail server, a chat app or a web form.

  • No special tool to rejoin

    The recipient opens the parts with 7-Zip or a similar archive app; nothing from us is needed on their side.

  • Any file type

    Videos, disk images, PSD files, backups or a ZIP you already made can all be split.

  • Private processing

    The upload is encrypted, the job runs in an isolated process, and the file and its parts are deleted after one hour.

FAQ

Split ZIP: questions and answers

What part size should I use to split ZIP files for email?
The default 20 MB fits under Gmail's 25 MB cap. If your company mailbox or a web form has a lower limit, set the part size a little below it. If the big file is a PDF, Compress PDF may get it under the limit in one piece.
How does the recipient open split ZIP parts?
They download every part into one folder and open the set with an archive app such as 7-Zip. If even one part is missing, the file can't be restored.
Can I split a file bigger than 50 MB?
With VIP, yes, up to 1 GB. Free accounts can split files up to 50 MB with 2 tasks a day, and visitors get 2 tasks in total.
Does splitting change my file?
No. Once the parts are joined and unpacked, you get back exactly the original. Files that are already compressed, like videos, won't get much smaller in the process. To make a video itself smaller, Compress Video shrinks it to a target size.
Are my files kept on your server?
Only for an hour. The upload is encrypted with HTTPS, each task runs in its own isolated process, and the file and all its parts are deleted automatically after that. We never look at them.
Share Split ZIP with a friendIt runs in any browser, and they can try it without signing up.

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