Merge PDF
Combine PDFs in seconds, in any order. Your files never leave your device.
- Never leaves your device
- No limits
- No sign-up
- No watermark
Quick answer: To merge PDFs, select the files, drag them into the order you want and click "Merge PDF". The combined document is created in your own browser and downloads instantly: no sign-up, no watermark and nothing uploaded to a server.
How to do it in 3 steps
- 1Select the PDFs or drop them in the area above.
- 2Drag the cards (or use the arrows) to put them in the right order.
- 3Click Merge PDF and download your file.
Why use Pronto Arquivo
Your files are never uploaded
Merging happens inside your browser. Contracts, personal documents and forms never touch a server.
No file or size limits
No daily quota, no upload cap. The only limit is your device's memory, which handles hundreds of pages.
Original quality
Pages are copied as they are: text stays selectable and images are not recompressed.
Works on your phone
Pick PDFs from Downloads or Google Drive on Android and iPhone, no app needed.
Guides
Merge PDFs without breaking a digital signature
Any change to a certificate-signed PDF invalidates the signature in the new file. To keep it valid, merge before signing, or send the signed PDFs separately if the recipient accepts that.
Merge large PDFs (over 100 MB)
Since nothing is uploaded, size isn't blocked. On phones with little memory, merge in batches of 100 to 200 pages and then combine the results.
Merge PDFs with images
This tool accepts PDFs only for now. Convert photos with JPG to PDF first, then merge the files.
Frequently asked questions
Is merging PDFs here really free?
Yes. It's free, with no usage limits, no sign-up and no watermark.
Are my files stored anywhere?
No. Your browser reads and merges the PDFs; they never leave your device. Close the page and everything is gone.
How many PDFs can I merge at once?
There's no maximum. In practice dozens of files work fine; the limit is your device's memory.
Can I merge PDFs on my phone?
Yes. It works in the browser on Android and iPhone. Tap "Select PDF files" and choose your documents.
Does merging remove a digital signature?
The new file won't keep a valid signature because the document changed. Merge before signing whenever possible.
Can I merge a password-protected PDF?
PDFs that need a password to open must be unlocked first. The tool tells you which file is protected.