When you need to combine PDFs
There are plenty of everyday situations where you end up with multiple PDF files that need to become one document:
- Job applications — combining your resume, cover letter, and references into a single file for submission
- Client deliverables — merging a proposal, scope of work, and terms into one document to send
- Expense reports — combining multiple receipt scans into a single PDF for reimbursement
- Legal filings — assembling affidavits, contracts, and supporting documents into one file
- Academic submissions — combining a thesis, appendices, and declaration into a single PDF
- Scanned documents — merging individually scanned pages into one multi-page document
How to merge your PDFs
- Open Filero's Merge PDF tool.
- Upload all the PDF files you want to combine. You can select multiple files at once or add them one at a time.
- Drag and drop the files into the order you want them to appear in the final document.
- Click Merge PDFs.
- Download your combined PDF file.
The entire process runs in your browser. Your files are never uploaded to a server, which means merging is instant and completely private.
What happens to formatting and quality?
Merging PDFs does not alter the content of any individual file. Each page retains its original formatting, fonts, images, and quality exactly as they were. The tool simply combines the pages from each file into a single PDF in the order you specified. Bookmarks, links, and form fields from the original files are preserved.
After merging
Once you have your combined file, you might want to:
- Compress the merged PDF if the combined file is too large to email
- Add page numbers so the combined document has consecutive numbering
- Add a watermark for confidential or draft documents
- Password protect the file before sharing
Frequently asked questions
Is there a limit on how many PDFs I can merge?
No hard limit. You can merge 2 files or 50 files. The tool runs in your browser, so performance depends on your device and the total combined file size. For most documents, merging is instant.
Can I choose the order of the pages?
Yes. After uploading your files, drag and drop them into the order you want. The merged PDF will follow the sequence you set. On mobile, use the up and down arrow buttons to reorder.
Are my files uploaded to a server?
No. The Merge PDF tool runs entirely in your browser using PDF-Lib, a JavaScript library. Your files never leave your device. This means merging is instant with no upload or download delay.
Will the merged PDF be too large to email?
If the combined file exceeds 25 MB (the Gmail limit), run it through the Compress PDF tool after merging. Compression typically reduces file size by 50 to 80 percent.
Can I merge PDFs on my phone?
Yes. Filero works in Safari on iPhone and Chrome on Android. Open the Merge PDF tool in your mobile browser, upload your files, reorder if needed, and download the merged result.