File Splitter & Merger
Split large files into smaller parts and merge them back. Pure browser-based, no upload needed.
How do I split a large file?
Upload your file, choose to split by size (KB/MB/GB) or by number of parts, then click Split. You can download parts individually or as a ZIP file.
How do I merge split files back together?
Switch to the Merge tab, upload all the part files, optionally upload the manifest file generated during splitting, and click Merge. The original file will be reconstructed.
What is the manifest file?
The manifest file (JSON) is generated when you split a file. It contains the original file name, size, and part order, making it easy to merge files back in the correct order.
Is my file uploaded to a server?
No, all splitting and merging happens locally in your browser. Your files never leave your device, ensuring complete privacy.
What is the maximum file size I can split?
There is no hard limit since processing happens in your browser. However, very large files (several GB) may be constrained by your browser's available memory and the File System Access API support.
Can I split any type of file?
Yes, the file splitter works with any file type including videos, documents, archives, images, PDFs, and more. It treats files as binary data without modifying the content.
Do the split parts need to be merged in order?
If you have the manifest file, parts are automatically merged in the correct order. Without the manifest, you may need to select parts in the right sequence, as they are named with sequential numbers.
Can I split a file into a specific number of equal parts?
Yes, choose the "by count" option and enter the desired number of parts. The tool will divide the file into roughly equal-sized chunks.
Why split a large file?
Large files may exceed email attachment limits, upload size restrictions on cloud services, or file system size limits. Splitting allows you to transfer, store, or share files that would otherwise be too large.
Is this tool free to use?
Yes, this file splitter and merger is completely free. No registration required, no hidden fees, and unlimited use.
Does it work on mobile devices?
Yes, the tool is fully responsive and works on smartphones, tablets, and desktop computers. However, splitting very large files is recommended on desktop for better performance.
What happens if I lose one of the split parts?
If a part is missing or corrupted, the merged file will be incomplete or damaged. It's important to keep all parts intact until you've verified the merge was successful.
How to Use File Splitter & Merger
Split large files into smaller parts or merge them back together entirely in your browser. Nothing is uploaded, so even confidential files stay on your machine.
- Open the Split tab, choose your file, and pick By Size (entering a KB, MB, or GB value) or By Count to set how many parts you want.
- Run the split, then download each piece listed under Split Result.
- To rebuild the original file, switch to the Merge tab and select the part files in order.
- Optionally load the Manifest File from the split step — it stores the original name and part list, so merging is automatic.
Keep all parts together until you merge them; renaming parts before merging can break the order recorded in the manifest.
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