Merge PDF
Combines separate PDFs in the order you choose. It is useful when attachments, chapters, invoices, or scans need to become one document without uploading files.
Runs in your browser. Files and results are not sent to Utilio servers.
Merge PDF
Combine PDFs in the selected order without sending files to a server.
Result
Choose files and run the tool to see the result.
- Files
- 0
- output files
- 0
What Merge PDF does
Use Merge PDF when you need to join a cover sheet, contract, appendices, and signed scan into one handoff file.
When to use it
- Join a cover sheet, contract, appendices, and signed scan into one handoff file.
- Combine monthly invoices or certificates before sending them to accounting.
- Put chapters or exported reports in a precise order before archiving.
How to use it
- Add two or more PDFs and check their order in the file list.
- Move files until the sequence matches the final document.
- Merge and download one PDF, then open the first and last pages for a quick sanity check.
What to check
- Do not merge password-protected files unless they open correctly in browser mode.
- Check that repeated covers or blank separator pages did not slip into the final file.
Data, formats, and limits
What stays on your device and what is sent
Runs in your browser. Files and results are not sent to Utilio servers.
Supported formats
Supported: PDF. Not supported: DOCX, XLSX, PPTX, JPG, PNG, HEIC, ZIP.
File limits and browser requirements
- Up to 100 MB per PDF
- Runs in browser memory, so very large, scanned, or image-heavy PDFs can be slow or fail on low-memory devices.
- Encrypted or damaged PDFs may not open unless the specific tool supports that workflow.
Known limits
- Runs in browser memory, so very large, scanned, or image-heavy PDFs can be slow or fail on low-memory devices.
- Encrypted or damaged PDFs may not open unless the specific tool supports that workflow.
Troubleshooting
- If the PDF does not open or processing stops, try a smaller file or close extra tabs to free browser memory.
- If the file is password-protected or damaged, first confirm it opens in a regular PDF viewer.
- If the file is in an unsupported format (DOCX, XLSX, PPTX, JPG, PNG, HEIC, ZIP), convert it into a supported PDF first.
Common questions
What does Utilio receive?
Runs in your browser. Files and results are not sent to Utilio servers.
What is it useful for?
Use it when you need to join a cover sheet, contract, appendices, and signed scan into one handoff file. Start by adding two or more PDFs and check their order in the file list.
Do I need an account?
No. You can use this tool without creating an account.
Can I use it on a phone?
Yes. For large files, complex previews, or careful review, a browser on a computer is usually more comfortable.
How do I get a reliable result?
Add two or more PDFs and check their order in the file list. Then move files until the sequence matches the final document. Do not merge password-protected files unless they open correctly in browser mode.
Which formats are supported?
Merge PDF supports PDF. It does not support DOCX, XLSX, PPTX, JPG, PNG, HEIC, ZIP.
What file size works best?
Up to 100 MB per PDF. Browser memory and device speed can still affect large files.
Why did I not get the result I expected?
Runs in browser memory, so very large, scanned, or image-heavy PDFs can be slow or fail on low-memory devices. If the result still looks wrong, try a smaller or simpler input and review the output before using it.
Does Utilio use my input or results to train AI?
No. Utilio does not use files, pasted text, settings, generated values, or results from this tool to train AI models.