What you need to merge PDFs
Just a browser. No software installation, no account, no watermark on the output file. ihatepdf's PDF merger runs entirely in your browser — your files never leave your device. It also works offline once the page has loaded.
How to merge PDFs in under 2 minutes
- Go to ihatepdf.cv/merge-pdf — no sign-up required.
- Upload your PDF files — click Select PDFs or drag and drop. Add as many files as you need — no limit.
- Drag to reorder — drag the thumbnails into the final page sequence you want.
- Click Merge PDFs — processing takes a few seconds locally in your browser.
- Download — the combined PDF downloads instantly with no watermark.
How to merge PDFs on Mac
On Mac you can also use Preview: open the first PDF, go to View → Thumbnails, then drag other PDFs into the sidebar. This works for basic merging but requires all files on your Mac already and you must save manually. For a faster solution that works on any OS without installing anything, ihatepdf's merger is the quickest option — and it doesn't require any application to be open.
How to merge PDFs on Windows
Windows has no built-in PDF merger. The fastest approach is a browser-based tool — open ihatepdf.cv/merge-pdf in Chrome, Edge, or Firefox, upload your files, and download the merged result. No software installation needed, no account required.
How to merge PDFs on iPhone or Android
ihatepdf works perfectly on mobile browsers. Open the tool in Safari on iPhone or Chrome on Android, tap to upload from your Files app or Google Drive, reorder the page thumbnails, and tap Download. The merged file saves directly to your phone's Downloads folder. No app installation needed.
What to do if the merged PDF is too large to email
After merging, if the file exceeds your email provider's attachment limit (Gmail caps at 25MB, Outlook at 20MB), run the merged file through ihatepdf's PDF compressor. Medium compression typically reduces a merged PDF by 40–50% with no visible quality loss on screen. If you still need it smaller, try splitting the merged PDF into logical sections and sending separately.
Reorder pages before merging for perfect results
If individual PDF files have internal page issues — wrong page order, sideways scans, or blank pages to remove — use Organize Pages on each file first to fix the internal order, then merge them all together. This two-step approach gives you full control over the final page sequence.
Merge PDFs without uploading to a server
Most PDF merging services upload your documents to their servers before combining them. For contracts, CVs, financial records, or any confidential document, this is an unnecessary privacy risk. ihatepdf uses pdf-lib compiled to WebAssembly — the entire merge operation runs inside your browser tab. The bytes of your documents never travel over the network.
Frequently asked questions
Is there a limit on how many PDFs I can merge?
No limit. Merge as many files as your device memory allows — typically 20–50 files on a desktop browser.
Will the merged PDF have a watermark?
Never. ihatepdf does not add watermarks to any output file under any circumstances.
Does merging PDFs reduce quality?
No. The merge operation is a structural operation only — it preserves the original quality of every page exactly as-is. No re-encoding occurs.
Can I merge password-protected PDFs?
You need to remove the password first, then merge, then re-encrypt with Encrypt PDF if needed.
Can I merge PDFs with different page sizes?
Yes. PDFs with different page dimensions (A4 mixed with US Letter, portrait mixed with landscape) can be merged — each page retains its original dimensions in the output. Use Crop & Resize first if you need all pages to be the same size.