Combine multiple PDF files into one. Drag and drop to reorder pages.
Select multiple PDF files to merge
Merging PDFs is one of those tasks that comes up constantly — combining a cover letter with a resume, assembling a multi-chapter report, packaging invoices for an accountant, or consolidating scanned documents into a single file. Most solutions either require expensive software (Adobe Acrobat), a subscription service, or uploading sensitive documents to a third-party server. This tool does it in your browser, free, with no uploads.
The order of files in the list is the order of pages in the output. Drag files to reorder them before merging. A few things to check before you start:
Preserved: All page content (text, images, vector graphics), page dimensions and orientation, embedded fonts, colors and transparency.
May not be preserved: Interactive form fields (the fields may appear but lose interactivity), bookmarks and table of contents entries, embedded JavaScript, digital signatures (signatures become invalid when the document is modified), and some PDF/A compliance metadata.
For most everyday use cases — combining scanned documents, assembling reports, packaging files for submission — these limitations don't matter. If you need to preserve interactive forms or digital signatures, use Adobe Acrobat or a dedicated PDF editor.
Merged PDFs can be larger than the sum of the originals because each source file's embedded resources (fonts, color profiles) are preserved separately even if they're identical across files. If file size is a concern, run the merged PDF through an image compressor or PDF optimizer after merging. For PDFs that are primarily scanned images, converting the images to JPEG before creating the PDF can dramatically reduce size.
PDF merging happens entirely in your browser using pdf-lib. Your documents are never uploaded to any server. This is especially important for sensitive documents like financial records, legal filings, and personal identification — they stay on your device throughout the entire process.
There is no hard limit set by the tool. You can add as many PDFs as your browser's memory can handle. In practice, merging 10-20 typical PDFs works smoothly. Very large files (100MB+) may be slow since all processing happens in your browser.
The merger combines the page content of all PDFs. Basic text, images, and layout are preserved. Complex features like interactive form fields, bookmarks, and embedded JavaScript may not be fully preserved depending on the source PDFs.
Yes. The files appear in the order you add them. You can drag and drop to reorder them before clicking Merge. The final PDF will have pages in the order shown in the list.
PDF merging can sometimes increase file size because the tool preserves all embedded resources (fonts, images) from each source file, even if they are duplicated across files. To reduce the size, compress the merged PDF after merging.
No. Password-protected PDFs cannot be processed without the password. You will need to remove the password protection first using a PDF password remover tool before merging.