Merge PDF
Combine multiple PDF files into a single document.
Arrastra tus archivos o haz click — PDF hasta 200 MB
Máx 190.73 MB por archivo
How do you merge PDF files online without uploading them?
Most online PDF mergers upload your documents to a server, combine them there, and send the result back. Docuboxer works differently: the merge runs entirely inside your browser using WebAssembly, so your files never leave your device. Drop in two or more PDFs, drag them into the order you want, and download a single combined document — no signup, no file size caps imposed by a server, and nothing to install. Because there is no upload or download round-trip, merging is effectively instant even for large documents: the only limit is your device's available memory. That makes this tool safe for contracts, financial records, medical documents, and anything else you would not paste into a random website. Once the page has loaded, it even works with your internet connection turned off.
How to use Merge PDF
- Drag and drop two or more PDF files into the drop zone, or click to browse and select them.
- Reorder the files by dragging them up or down in the list until the sequence matches the final document you want.
- Click merge and download the combined PDF straight to your device — the whole operation happens locally.
Common use cases
Compile application and case files
Combine a cover letter, ID scans, forms, and supporting evidence into one ordered PDF for job applications, visa paperwork, or legal submissions.
Assemble reports from multiple sources
Merge exported charts, financial statements, and written sections produced by different tools or teammates into a single deliverable.
Consolidate scanned documents
Join separate scans — receipts, signed pages, contracts scanned one page at a time — into one archive-ready file.
Prepare course material and study packs
Group lecture notes, assignment scans, and reading excerpts into a single PDF that is easier to share and print.
Combine confidential documents safely
Because processing is 100% local, you can merge NDAs, payroll documents, or client records without sending them to a third-party server.
Frequently asked questions
How do I merge PDF files for free?
Open the tool, drop in your PDFs, arrange them in order, and click merge. It is free with no signup, no watermark, and no daily task limit — the merge runs in your browser rather than on a metered server.
Is it safe to merge PDF files online?
With Docuboxer, yes: your files are never uploaded. The merge is performed locally in your browser's memory using WebAssembly, so no server, log, or backup ever sees your documents. Closing the tab removes every trace.
Can I change the order of the PDFs before merging?
Yes. Drag the files up or down in the list to set the exact page sequence of the final document before you merge.
Is there a limit on how many PDFs I can merge?
There is no artificial limit. The practical ceiling is your device's free RAM, which comfortably handles merging dozens of PDFs at once.
Will merging break my documents' formatting, forms, or bookmarks?
Page content — text, images and layout — is preserved exactly as in the originals. Bookmarks and outlines, however, are not carried over into the combined file, and interactive form fields from different documents can conflict, so check the merged result if your PDFs contain fillable forms.
Do I need to install software or a browser extension?
No. Everything runs on the web page itself — no desktop app, no Chrome extension, and no account. Any modern browser with WebAssembly support works.
Can I merge PDFs offline?
Yes. Once the page has loaded you can disconnect from the internet and keep merging — processing is fully local, so no connection is needed.