Merge PDF
Drop in two or more PDFs, arrange the order, and get one file back — processed entirely on your device, so contracts and private documents are never uploaded.
Drop PDF files here, or click to choose
Order matters — you can drag rows to rearrange them afterwards
Page ranges are optional — leave them empty to include every page. Examples: 1-3, 2,5,9-12.
Merging without the upload
Traditional merge sites receive your file, join it server-side, and hand it back — which means your document makes two full network trips and sits on somebody's storage in between. This tool uses pdf-lib, a JavaScript PDF library running inside your browser tab. Each file is read with the browser's File API, its pages are copied into a fresh in-memory document in your chosen order, and the result is saved directly to your disk. There is no size limit beyond your device's memory, and it keeps working offline.
FAQ
Can I take only some pages from a file?
Yes — type a range like 1-3 or 2,5,9-12 in that file's Pages box. Leave it empty to include the whole document. Ranges are applied per file, so you can mix whole documents and page selections in one merge.
Are bookmarks, forms and annotations preserved?
Page content, annotations and form fields survive the merge. Document-level outlines (bookmarks) are not carried over — most merge tools behave the same, since outlines live outside the page tree.
What about password-protected PDFs?
Encrypted files cannot be read without the password and are skipped with an error message. Remove the protection in the app that created the file first.
Is there a file-size or file-count limit?
No hard limits — processing happens in your device's memory. Dozens of ordinary documents merge in a second or two; scanned files with large images simply use more memory.
Do you need to split afterwards instead?
Use the Split PDF tool to break one document into ranges, or the Page Organizer to reorder, rotate and delete pages within a single PDF.