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Merge PDFs Online — Free, Browser-Only

Combine two, three, or a dozen PDFs into a single document. Every page is preserved exactly — fonts, images, annotations, bookmarks — and you can reorder them after merging.

Nothing uploads. Everything happens in your browser.

Open the editor

How it works

Open wt-pdf.com and drop in your first PDF.
Click Merge and pick the next PDF — its pages are appended.
Repeat for as many PDFs as you want.
Drag thumbnails in the sidebar to reorder pages, then Download.

No file-size or page-count limits

Other tools cap you at 2–5 files or 100 pages. WT-PDF runs in your browser, so the limit is your device's memory — in practice, hundreds of pages merge quickly.

Reorder after merging

Each merged page becomes a thumbnail in the sidebar. Drag to reorder, shift-click for multi-select, or type a range (e.g., 1-3, 5, 8) to delete pages.

FAQ

Does the order of merged PDFs matter?

Yes — they're appended in the order you pick them. You can reorder after.

Will bookmarks survive?

Existing page bookmarks are preserved as best-effort.

What happens to encrypted PDFs?

You'll be prompted for the password before the file can be merged.

Is there a page limit?

No built-in limit. Very large merges may be slow on low-memory devices.