File Splitter & Joiner
Break a file that is too big to send into smaller numbered parts, then rejoin those parts back into the exact original later. A simple way around email and upload size limits.
A file splitter breaks a file that is too big to send into smaller numbered parts, then rejoins those parts back into the exact original later. Drop in a large file, choose a part size such as 10 MB each, and share the pieces one at a time, so it works to split a large file or get past an email size limit. Later, drop the parts back in and the file is rebuilt byte for byte. Everything happens on your own device with nothing uploaded.
Read the guide: How to Split & Rejoin Large FilesDrop a file here, or click to browse
Everything stays on your device — nothing is uploaded.
How it works
- 1
To split: add a file
Drop in the large file and choose a part size, such as 10 MB each.
- 2
Download the parts
Get numbered pieces you can send or upload one at a time.
- 3
To join: add the parts
Later, drop all the parts back in and the original file is rebuilt, byte for byte.
Instant & 100% private — nothing is uploaded
Everything runs locally in your browser. Your files are processed on your own device and are never sent to a server, so there are no upload waits, no size limits from us, and nothing is ever stored or logged.
Frequently asked questions
- Is the rejoined file identical to the original?
- Yes. Splitting only cuts the file into pieces and joining stitches them back in order, so the rebuilt file is byte-for-byte the same as what you started with.
- Why would I split a file?
- To get past size limits. Email attachments, chat apps and some upload forms cap how large a single file can be, so splitting lets you send a big file as several smaller parts.
- Do I need this exact tool to rejoin the parts?
- Use the join mode here to rebuild the file reliably. Keep all the numbered parts together, since every piece is needed to restore the original.
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