Merge PDF
Combine multiple PDFs into one. Drag to reorder. Files never leave your browser.
Combine multiple PDF files into one document. Drag to reorder, browser-side processing, no upload, no signup, no watermark.
Merge PDF online is one of the most-requested PDF operations. Whether you're combining bank statements, assembling chapters of a manuscript, or stitching together signed contracts, you need a tool that just works without watermarks, signups, or a daily limit.
Pick Rack's Merge PDF tool runs entirely in your browser using the open-source [pdf-lib](https://github.com/Hopding/pdf-lib) library. Your files never leave your device — they are processed locally in your browser memory and discarded when you close the tab. No upload, no server-side storage, no privacy concerns for sensitive documents.
It's free with no daily limit, no file count limit (your browser memory is the only constraint), and no watermark on the output. Files up to 200MB each work smoothly on modern hardware.
Key features
- 100% browser-side privacy — Files never upload to a server. All processing happens in your browser, ideal for confidential documents.
- Drag-to-reorder UI — Once files are added, use up/down arrows to set the merge order. Preview file names and sizes before you commit.
- No file count limit — Merge 2 PDFs, 20 PDFs, or 200 — only your browser memory limits the operation.
- Encrypted PDFs supported — If you have view permission, encrypted PDFs are merged transparently. Output is decrypted.
- Free forever, no watermark — No premium tier, no daily quota, no "upgrade to remove watermark" nag screen. Free means free.
How to use
- Step 1: Add your PDFs — Drop two or more PDF files into the upload area, or click to browse. They appear in an ordered list.
- Step 2: Set the merge order — Use the up/down arrows next to each file to arrange them. Remove files with the X button if needed.
- Step 3: Click Merge PDFs — Processing typically completes in 1-5 seconds. A green Download button appears.
- Step 4: Download merged.pdf — Save to your device. The merged file contains all pages of all input PDFs in your chosen order.
When to use
- Combine bank statements from multiple months into a single archive
- Assemble a portfolio of work samples (case studies, designs, references)
- Stitch contract sections that arrived in separate emails into one signed document
- Merge book chapters drafted as separate files before final review
- Compile receipts for an expense report or tax submission
- Combine scanned pages from a multi-pass scanner into one document
Frequently asked questions
Is this Merge PDF tool really free?
Yes, completely free with no daily limit, no signup, no watermark. The site is supported by display advertising and affiliate commissions on unrelated products. Tool functionality is fully unrestricted.
Are my PDF files uploaded to your server?
No. All processing happens in your browser using the pdf-lib JavaScript library. Files load into your browser memory, get merged, and are discarded when you close the tab. Nothing is sent to our servers.
What's the maximum file size I can merge?
Each input file can be up to 200MB. Total combined size is limited only by your browser memory (most modern browsers handle 1-2GB before slowing down). For very large archives, merge in batches.
Do encrypted (password-protected) PDFs work?
Yes, if you have view permission. Encrypted PDFs are merged into the output as decrypted content. If you need to keep encryption, use the Protect PDF tool on the merged result.
Can I merge PDFs of different page sizes?
Yes. Each input PDF keeps its original page sizes in the merged output. The result will have mixed page sizes if your inputs do.
Can I merge PDFs from a phone or tablet?
Yes, on any modern mobile browser (Chrome, Safari, Firefox, Edge). For very large merges (over 100MB total), mobile performance may be slower than desktop.
Will the merged PDF have any quality loss?
No. pdf-lib copies pages without re-encoding, so text stays vector-sharp and images remain at original resolution. Output file size is approximately the sum of inputs.
Can I keep my files private?
This tool already keeps files private — they never leave your device. For additional security, run the tool in an offline environment after the page loads.