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. Use the up/down controls on any device, or drag rows on desktop, 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 first opens each PDF locally, rejects unreadable or empty files, and shows its page count before it joins the ready queue. 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. Ordinary page appearance, page size, and selectable text are copied without rasterizing the pages. The result is parsed again and downloaded only when its page count matches the ready-queue total. Because every step happens in your browser tab, your file bytes 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-scan.pdf + page2-scan.pdf + page3-scan.pdf → contract-copy.pdf. Stitch separately scanned pages into one reference copy.

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.
• No account or task paywall. There is no signup, hourly task quota, or watermark; practical file size depends on your device's available memory.
• Observable ordering. A numbered file list, page totals, and dedicated move buttons keep the intended sequence visible on desktop and mobile.
• Local processing. Once the required page code has loaded, PDF inspection, merging, and verification happen on your device.

Tips and limits

• The order in the file list is the order in the final PDF, so arrange the rows before you merge.
• Whole-page copying is designed to preserve ordinary page appearance and selectable text. Forms, bookmarks, internal links, attachments, and digital signatures may not survive; check signed or interactive files in the viewer where you plan to use them.
• 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? Use Split PDF. 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