Merge PDF

What this tool does

This is a free tool to merge PDF files — it combines two or more PDFs into a single document, in the order you choose, without uploading anything. Add your PDFs, drag them into the sequence you want, and download one combined file. It is the answer to the very common "I have these separate PDFs and I need them as one" problem, whether that is a CV plus a cover letter, a set of handouts, or several signed pages of the same agreement.

The merge runs entirely in your browser, which is exactly what you want when the documents are private — contracts, statements, or paperwork you would never want to upload to a third-party site.

How to use it

1. Add your PDFs. Drag your files onto the drop zone, or tap Choose files to pick them.
2. Put them in order. Drag the rows in the file list (or use the up/down controls) so the documents will be combined in the right sequence — the first row becomes the first pages of the result.
3. Merge and download. Press Merge & Download; the combined PDF is built in your browser and saved to your device. No account, no waiting in a queue — use it and go.

How it works (the method behind it)

The tool reads each PDF you add straight from your device into memory. Using pdf-lib, an open-source JavaScript PDF library, it creates a new empty PDF and then copies every page from each source document — in the order you set — into that new document with pdf-lib's copyPages operation. The pages keep their original size and content; nothing is re-rendered or degraded. Once all pages are copied, the new PDF is serialized to bytes and handed to you as a download. Because every step happens in your browser tab, your files never travel across the network.

Examples

• CV.pdf + cover-letter.pdf → application.pdf. Add both, put the CV first, download one file to attach to a job application.
• lecture-1.pdf … lecture-5.pdf → course-notes.pdf. Combine five handout PDFs in week order into a single study document.
• page1-signed.pdf + page2-signed.pdf + page3-signed.pdf → contract.pdf. Stitch separately signed pages back into one complete contract.

Common use cases

• Joining a CV and cover letter (and a portfolio) into one PDF for an application.
• Combining lecture handouts, chapters, or reports into a single study or reference file.
• Reassembling a contract or form whose pages were signed or scanned separately.
• Merging monthly statements or invoices into one file for record-keeping.
• Anyone who needs one PDF from many but refuses to upload private documents.

Why use this one

• Your documents never leave your device. The merge is done locally — check your browser's Network tab to confirm there is no upload. SmallPDF, iLovePDF, and Adobe all upload your files; this tool does not.
• Free and unlimited. No "2 free tasks per hour" wall, no file-size cap, no signup, and no watermark on the merged file.
• Exact ordering. A clear, draggable file list so the documents end up in precisely the sequence you intend.
• Works offline after the first visit — perfect for merging sensitive paperwork on a disconnected machine.

Tips and limits

• The order in the file list is the order in the final PDF, so arrange the rows before you merge.
• Merging several very large PDFs uses significant memory; this works best on a desktop, and on a phone you should stick to a few smaller files at a time.
• Want to split a PDF back apart or pull out specific pages instead? That page-extraction tool is coming to the set. To make a PDF from images, use JPG to PDF; to turn a PDF's pages into images, use PDF to JPG. See all the PDF tools.

Frequently asked questions