OK Tools

Free browser tool

Merge PDF Files

Combine multiple PDFs into a single document right in your browser. Reorder, merge, download — no upload.

Drop PDF files here

or click to choose several — merging runs on your device

100% client-side — your PDFs never leave this device. Large PDFs use more memory — very big files may be slow or fail on phones.

About this PDF merger

Combine reports, scans, receipts, or chapters into one PDF. Pick the files, arrange them, and merge — pages are copied in order with pdf-lib.

Merging happens locally in your browser, so sensitive documents stay on your device.

Need only some pages? Split or delete pages first, or compress the merged result afterwards.

Why merge here

No upload, ever

pdf-lib runs inside your browser tab. Contracts, invoices, and IDs never touch a server.

Free, no signup

No account, no watermark added by us, no daily limit.

Works on mobile

Responsive layout for phone, tablet, and desktop — no app install.

Part of a PDF toolkit

Jump to merge, split, compress, delete, insert, or stamp — each with its own page.

How to merge PDFs

  1. 1

    Add your PDFs

    Drop or select two or more PDF files.

  2. 2

    Set the order

    Move files up or down until the order is right.

  3. 3

    Merge and download

    Click Merge PDFs and save the combined file.

FAQ

More utility tools

Compress PDF

Re-pack a PDF in your browser to trim its size.

Split PDF

Extract pages or split a PDF by page ranges.

Insert PDF pages

Insert pages from one PDF into another at any position.

Stamp / watermark PDF

Add a text watermark or image seal to PDF pages.

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