Merge PDFs without uploading files online
Documents are read and combined on the device. Content is not transferred to Singularity Labs servers.
Singularity Tools · PDF
Merge PDFs online for free
Combine multiple PDFs into a single document. Choose the order, review the pages, and download the result without watermarks.
- Processing directly in the browser
- No files sent to the server
- Document order is editable
Drag and drop your PDFs here
Select at least two documents to merge.
Maximum 20 files, 150 MB, and 500 total pages.Selected documents
Choose the order of the final PDF
Trascina le schede nella griglia per cambiare la sequenza. Tutte le pagine di ciascun file manterranno il proprio ordine.
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Merging documents…
How it works
A single PDF, in the correct order
- 1
Upload documents
Select two or more PDFs from your computer or smartphone.
- 2
Sort files
Drag the tabs or use the arrows to define the sequence.
- 3
Download the result
The browser creates a single PDF while maintaining the quality and size of the original pages.
Keep all pages
Each PDF is inserted in full, respecting the orientation, format, and order of the original pages.
Works on smartphones too
The interface adapts to the screen and allows you to move, delete, and add files even from mobile.
Frequently asked questions
Everything you need to merge PDFs
How can I merge multiple PDFs?
Upload at least two documents, arrange them in your desired order, and click “Merge and download PDF”.
Is merging PDFs free?
Yes. You can merge up to 20 PDFs, within 150 MB and 500 total pages, without a watermark.
Are my files stored?
No. Documents remain in the browser for the duration of the session and are not saved on the server.
Does the quality of the pages change?
No. The original pages are copied into the new document without converting them into images.
Can I change the order of the PDFs?
Yes. Drag the tabs or use the Up and Down buttons before creating the final document.