Combine two or more PDF files into one in a few seconds. Everything happens locally in your browser using pdf-lib — your files are never uploaded to a server.
Merging PDFs is one of the most common document operations: combining receipts for an expense report, stitching scanned pages into one document, joining a cover letter and resume into a single application file, or assembling a multi-chapter ebook. The traditional desktop tools (Adobe Acrobat, Preview) handle it, but require either an install or a paid license. A browser-based merger is faster and free.
Click the file picker and select two or more PDFs. They'll merge in the order you select them. Click Merge PDFs and the tool uses pdf-lib (loaded from a CDN) to combine the documents page by page. The merged file downloads automatically as merged.pdf — never sent to any server.
Use it when assembling expense receipts, joining scanned documents, combining multi-section reports, building a single application package from multiple documents, or just consolidating PDFs that were emailed in pieces.
For specific page-order arrangements, split the source PDFs first, then merge in the desired order. For password-protected PDFs you must unlock them first (use the Unlock PDF tool). The merged file's metadata defaults to the first PDF's title — edit if needed in a separate PDF tool.
No — everything happens in your browser. The PDFs never leave your device.
Browser memory is the only limit. Merging 50+ PDFs or files over 100 MB each may slow down older devices.
Basic page content yes; advanced features like AcroForms, JavaScript actions, and bookmarks may be simplified or stripped — pdf-lib handles them best-effort.
Explore more pdf tools on the tool hub — or jump straight to the Rotate PDF, Unlock PDF, Lock PDF.