FileopiaMerge PDF files
Merge PDF files into one document in seconds. Free, no sign-up, no file limits and no watermark. Files are combined in your browser and never uploaded.
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- ✓ 100% free
- ✓ No sign-up
- ✓ No limits
- 🔒 Files never leave your device
How to: Merge PDF
- Select or drop the PDF files you want to combine.
- Reorder them with the Up/Down buttons.
- Click Start and download your merged PDF.
Merging PDFs is the quickest way to turn scattered documents – scans, invoices, chapters, forms – into one tidy file that is easy to share, print and archive. Fileopia joins your files right inside your browser, so even confidential contracts or ID scans never touch a server.
Common uses
- Combine a scanned passport, ID and application form into one PDF for an online application.
- Join monthly invoices or bank statements into a single file for your accountant.
- Put together chapters, a cover page and an appendix into one report or thesis.
- Merge several signed pages back into the full contract.
Tips for best results
- Sort files into the right order before you click Start – use the Up/Down buttons.
- If the final file is too large for email, run it through Compress PDF afterwards.
- Need only some pages from each file? Split or Extract pages first, then merge.
Combine PDF files in the order you want
Add two or more PDFs, drag the file cards into the order you need – or use the sort button to order them alphabetically – and press Merge. Fileopia copies every page into a new document without re-encoding anything, so text, links, fonts and image quality are preserved exactly. The merge happens inside your browser, which means a 300-page bundle of confidential contracts never touches a server.
- Mix PDFs and images – JPG, PNG, WebP, HEIC, AVIF, GIF and BMP files are added as pages, so you can append a photographed receipt to an expense report in one go.
- A bookmark for each file – the merged PDF gets an outline entry named after each source file, so readers can jump straight to ‘Invoice‑March’ or ‘Chapter 3’ in any PDF viewer.
- Blank-page separators – optionally insert an empty page between files, handy for printing sections.
- Even page padding for duplex printing – pads each file to an even page count so every document starts on a new sheet when printed double-sided.
How to merge PDFs offline
Once this page has loaded you can disconnect from the internet and keep merging – the pdf-lib engine that does the work is already in your browser. That makes Fileopia a practical offline PDF merger on a train, in a secure office network or anywhere connectivity is poor, without installing software.
Merging on Mac, Windows, iPhone and Android
Because it is a web page, the same tool works in Safari on macOS and iOS, Chrome or Edge on Windows, and Chrome on Android. On a phone, tap the upload area to choose files from Files, Photos or Google Drive; the merged PDF is saved to your downloads. macOS users can also merge in Preview, but Fileopia is quicker when the files come from different folders or include images.
Can I merge files stored in Google Drive?
Yes – download them first, or on Android and iOS pick them directly from the Drive provider in the file picker. The files are read locally; Fileopia never asks for access to your Drive account.
Reducing the size of a merged PDF
Merging adds sizes together: three 4 MB scans make a 12 MB PDF. If that is too large for e-mail, run the result through Compress PDF or a fixed-size tool like Compress PDF to 1 MB. Compressing once after merging is faster than compressing every part.
Merging Word, Excel or PowerPoint files
Convert them to PDF first with Word to PDF, Excel to PDF or PowerPoint to PDF – all of which also run locally – and then merge the PDFs here. Need to reorder or remove individual pages after merging? Use Organize PDF.
Tips for a tidy merged document
- Name files before merging – the names become bookmarks, so ‘01 Cover’, ‘02 Report’ is better than ‘scan0043’.
- Use the A–Z sort when files are numbered, then fine-tune by dragging.
- Rotate sideways pages afterwards with Rotate PDF, and add page numbers once the final order is set.
- Turn on even page padding before printing double-sided bundles.
Merge PDF: Fileopia vs iLovePDF, Smallpdf, Adobe and Sejda
| Fileopia | iLovePDF | Smallpdf | Adobe Acrobat online | Sejda | |
|---|---|---|---|---|---|
| Where your file is processed | In your browser – never uploaded | Their servers | Their servers | Adobe cloud | Their servers |
| Works with Wi‑Fi switched off | Yes, after the page loads | No | No | No | No |
| Account or e-mail needed | Never | Not for basic use | Not for basic use | Sign-in for some actions | Not for basic use |
| Free usage caps | None – limited only by your device | Free tier; Premium for more | Free tier; Premium for more | Free tier; Premium for more | 3 tasks/hour, 50 MB per file |
| Add images (JPG/PNG/HEIC) as pages | Yes | Separate tool | Yes (PDF, Office, JPG, PNG) | See site | See site |
| Bookmarks per file | Yes | Not offered on page | Not offered on page | See site | See site |
Competitor details from their public tool pages, checked 25 Oct 2026. Sejda’s free web plan states 3 tasks per hour and 50 MB per file. Offers change – check their sites for current terms.
Your files never leave your device
Merge PDF runs entirely in your browser using JavaScript and WebAssembly. Your files are read from your disk into this tab, processed in memory and saved straight back to your downloads folder – they are never uploaded to Fileopia or any third party.
- Test it yourself: once this page has loaded, switch off Wi‑Fi or mobile data and run the tool – it keeps working.
- Check the network: open your browser’s developer tools (F12 → Network) while processing; you will see no file upload requests.
- Nothing to delete: close the tab and the data is gone – there is no server copy, no retention period and no account.
Other tools
- Split PDF – Extract pages or split a PDF into several files.
- Organize PDF – Reorder, rotate, delete and extract pages visually.
- Compress PDF – Reduce the file size of your PDF.
- JPG to PDF – Convert JPG, PNG or WebP images to PDF.
- Word to PDF – Convert DOCX documents to PDF.
Frequently asked questions
How many PDFs can I merge?
As many as your device's memory can handle — there is no artificial limit.
Can I merge PDF and JPG files together?
Yes. Add images alongside PDFs and each image becomes a page in the order shown. HEIC photos from iPhones work too.
How can I merge PDF files on a Mac?
Open this page in Safari or Chrome, add the files, drag them into order and click Merge. Nothing to install, and the files stay on your Mac.
How do I reduce the size of a merged PDF?
Run the merged file through Compress PDF. The Recommended level usually cuts scanned documents by more than half while keeping text sharp.
Can I combine password-protected PDFs?
Encrypted PDFs must be unlocked first with Unlock PDF, using the password you know. Then merge them normally.
What is the best way to combine PDF files offline?
Open this page once, then go offline – merging keeps working in the browser with no installation. Your files never leave your device.
Will merging reduce the quality of my PDFs?
No. Pages are copied as they are, so text stays selectable and images keep their original quality.
Can I merge password-protected PDFs?
Unlock them first with Unlock PDF (you need the password), then merge.
Is Merge PDF really free?
Yes. Every tool on Fileopia is 100% free with no file limits, no sign-up and no watermarks. The site is supported by unobtrusive ads.
Are my files uploaded to a server?
No. Fileopia processes your files directly in your browser using JavaScript. Your documents never leave your device, so they stay completely private.
Last updated: · Written and tested by the Fileopia team