File Joiner
Concatenate multiple files (binary-safe) in the order you specify.
How to Use
- Drop files in the order you want them.
- Drag rows to reorder.
- Download the joined result.
Notes
About the File Joiner
Whether you are at a desk or on your phone, the File Joiner makes image, audio and file tasks easy — and it is completely free. Concatenate multiple files (binary-safe) in the order you specify.
How it works
Enter what you have and read the result as it updates live. It all runs on your own device, so it is quick and private, with nothing to install.
Want the deeper story? The Knowledge Base explains the ideas behind the tools in more detail.
Frequently Asked Questions
Which formats?
Great for splitting/reassembling archives, video segments from a splitter, or concatenating CSVs.
CSV headers?
Check "Skip first line after first file" to drop repeat headers.
How do I use the File Joiner?
Simply type your numbers and read the result, which refreshes the instant you change something. There is nothing to submit and nothing to wait for.
Is it free? Does it work without internet?
Yes to both. It is free with no sign-up, and once the page has loaded it keeps working even with no internet.
Where does my data go?
Nowhere — every calculation runs on your own device. Nothing you enter is uploaded, logged, or stored.
Common Use Cases
Split archive
Reassemble .part files.
Stitch CSVs
One big file from many.
Last updated: