Combine split file parts back into a single file. Works perfectly with files split using our File Splitter tool.
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Drop file parts here or click to select multiple files
Select all parts in order, or drag them to reorder
File Parts (drag to reorder)
merged_file0 MB
Privacy & Security: This tool is for personal use. Your files are not uploaded to any server. All processing happens client-side in your browser.
Disclaimer: Ensure all parts are from the same original file and are in the correct order for successful reconstruction.
What the File Merger Does and Why It Matters
The File Merger rejoins file parts back into a single file in your browser. It is the companion to the File Splitter: feed it the numbered pieces and it reassembles them, in order, into the original file.
This matters because once a file has been split to get past a size limit, you need a reliable way to reconstruct it exactly. Merging locally guarantees the rebuilt file is byte-for-byte the original and keeps the contents on your own device.
How to Use File Merger
Select all the file parts you want to merge.
Make sure they are the complete set, in the correct numbered order.
Run the merge to concatenate the parts.
Download the reassembled file and verify it opens as expected.
Optionally confirm integrity with the Checksum Calculator.
Supported Inputs and Limitations
What you provide
All numbered parts produced by a file splitter
The parts in the correct order
What you get
A single reassembled file
A faithful reconstruction of the original
Known limitations
A missing or out-of-order part produces a corrupt result — you need the full set.
It is designed for parts created by a compatible splitter such as the NovaTools File Splitter.
Merging very large sets depends on browser memory.
Privacy and Security
Merging happens entirely in your browser. The parts are combined on your device and nothing is uploaded to NovaTools or any external server.
Frequently Asked Questions
What parts does it accept?
Numbered parts created by a file splitter, ideally the NovaTools File Splitter. Provide the complete set in order.
How can I confirm the merge worked?
Open the resulting file, or compare its checksum to the original using the Checksum Calculator to confirm it is identical.
Are the parts uploaded?
No. They are merged locally and never leave your browser.
This free online tool helps you merge split file parts back into a single complete file. It's the perfect companion to our File Splitter tool, allowing you to reconstruct files that were divided for easier transport or storage.
How to Use
Select all file parts by dropping them onto the upload area or clicking to browse.
Drag and drop parts to reorder them if needed, or click "Auto Sort" to sort alphabetically.
Click Merge Files to combine all parts.
Download the reconstructed file once processing is complete.
Frequently Asked Questions
Is my file data kept private?
Absolutely. All processing happens entirely in your browser. No file data is sent to any server, logged, or stored anywhere. Your files remain completely private.
Does the order of parts matter?
Yes, the order is crucial. Parts must be combined in the correct sequence to reconstruct the original file. Use the drag handles to reorder, or use "Auto Sort" if parts are named sequentially.
What if I'm missing a part?
The merged file will be incomplete or corrupted if any parts are missing. Ensure you have all parts before merging. The tool will warn you if the total size seems inconsistent.
Can I merge any type of file?
Yes, this tool works with any file type. As long as the parts are from the same original file, they can be merged regardless of the file format.
How do I split files in the first place?
Use our File Splitter tool to divide large files into smaller chunks for easier sharing or storage.
Recommended next reading
Use these practical guides to understand when this tool is the right choice, what to check before exporting, and which workflow usually comes next.
