Combine multiple PDFs into a single document instantly.
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Combine reports, ebooks, or invoices into one file in seconds.
Drag and drop multiple PDF files. You can upload up to 10 files at once for free.
The files will be merged in the specific order you uploaded or arranged them.
Click 'Merge' to stitch them together into a single downloadable PDF document.
Make sure your PDFs are not password protected before merging. If they are, use our Unlock PDF tool first to remove restrictions.
Merging PDFs isn't just about glueing files together. It's about maintaining the integrity of the document structure (XRef tables) while unifying resources.
We use a stream-based approach. Instead of loading entire GB-sized documents into memory, we parse the object tree of each PDF, re-map their object IDs to avoid collisions, and stitch them into a new container.
This ensures that fonts, images, and links are preserved perfectly, and the final file size is optimized by removing duplicate resources. We handle complex features like Bookmarks and AcroForms intelligently.
Keeps optional content groups & layers intact.
Merges quickly without RAM spikes.
Files processed in ephemeral containers.
Managing dozens of separate PDF files can be chaotic. Merging them simplifies sharing, archiving, and printing. Instead of sending 5 separate attachments, send one professional document.
Whether you are combining chapters of a thesis, monthly invoices for your accountant, or scanned pages of a contract, our tool ensures a seamless join without losing quality or breaking links.
Combine thesis chapters, citations, and charts into a single dissertation file.
Merge monthly invoices, expense receipts, and reports into a unified packet.
Consolidate contracts, affidavits, and evidence scans into one case file.
The process of appending one PDF document to the end of another.
A cross-reference table inside a PDF that locates objects. We rebuild this to ensure valid files.
The standard for PDF forms. Merging forms can be tricky if field names collide.
Converting interactive form fields into static text, often optional during merging.
Small preview images of PDF pages used to visualize order.
Information about the file (Author, Title). Merged files typically inherit metadata from the first file.
Files are processed locally or in memory. We do not persist your sensitive documents.
Zero-Knowledge"Merged 100 invoice PDFs into one perfectly. A lifesaver."
"Used it for my thesis chapters. Simple and fast."
"Best online merger I've found. Handles large files without crashing."
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