Merge PDF

Combine several PDFs into a single file. Drag and drop to reorder before merging. 100% local — files never leave your device.

Drop PDFs here or click to browse
Add two or more PDF files to combine • Files stay on your device
.pdf
Local processing

Merge PDF Files Online — Free, Fast & 100% Private

The PDF merger at PDFGuru lets you combine multiple PDF documents into a single file without installing any software and without sending your files to any server. Whether you are assembling a contract from individual sections, joining receipts for an expense report, or consolidating academic papers for easier reading, the entire workflow happens in your browser tab.

Traditionally, online PDF combiners accept a file upload, queue it on a remote server, merge the documents, and then make you download the result. PDFGuru replaces that risky chain with a fully client-side flow powered by pdf-lib. When you drag your PDFs onto the dropzone, the browser reads them straight into an in-memory array buffer and performs the merge locally. No tracking pixel can see your content, no third party can leak your file, and the upload step does not exist.

Because the operation is local it is also instant. A typical ten-PDF merge completes in well under a second on a modern laptop. You can drag and drop files in any order, then rearrange them by holding the grip handle and dragging a row up or down. PDFGuru preserves the original page sizes, bookmarks, and embedded fonts. Outgoing files remain visually identical to their source — only the container changes.

律師, 法務, students and anyone working with sensitive documents appreciate that they can use this tool on a public computer without leaving any residue on disk. Files are read into memory and discarded the moment the page reloads. There is no installation, no email signup, and no per-day quota. The tool is yours to use as often as you like.

Try the merge PDF tool above with as many files as you wish — there is no file-size limit, no watermarks added to the output, and no premium tier gating you out of the simple act of joining two of your own documents together.

Merge PDF — Frequently Asked Questions

There is no artificial limit. We have tested merges of several hundred files. Performance depends on the total file size and your device's available RAM.
No — the source files are only read, never mutated. A brand-new PDF is built from them and saved when you click the download button.
Page content, fonts and basic structure are copied wholesale via pdf-lib's copyPages API. Simple link annotations are usually preserved; very complex outlines may not be.
Yes. Once the page has loaded, all processing happens locally. You may disconnect from the internet and continue merging documents.