How to merge multiple PDFs into one (without installing software)
You received a bunch of separate PDF files — invoices, a contract split into parts, e-book chapters — and need to send everything as a single document? It's one of the most common everyday tasks, and you can solve it in less than 1 minute, without installing any software.
Why merge PDFs into one
- Email: easier to send 1 attachment than 10
- Printing: sends everything to the printer at once, no need to open file by file
- Documentation: invoices, bills, statements — neatly organized in a single document
- Forms: online forms usually only accept 1 PDF per attachment
- Archiving: easier to back up 1 large file than 20 small ones
How to merge PDFs on TinyFoto (step by step)
- Visit the Merge PDF page on TinyFoto
- Drag all PDFs at once into the central area — or hold Ctrl (Windows) / Cmd (Mac) to select multiple in the file dialog
- Files appear in a list. You can drag by the ⋮⋮ icon or use ⬆ ⬇ buttons to reorder
- Use ✕ to remove a file from the list
- Click "Merge and download PDF"
- The combined file downloads automatically
How many PDFs can I merge?
TinyFoto accepts up to 20 PDF files at once, with up to 100 MB each. For most everyday uses (invoices, bills, book chapters), that's more than enough.
Do PDFs get heavy after merging?
The final file is roughly the sum of all original PDFs — it's not compressed. If it gets too large for email or messaging, we recommend:
- Check whether any of the originals is heavy due to high-res images. If so, compress images first (use the image compressor, then build the PDF)
- Or use our dedicated PDF compressor — see the PDF tools hub
Is it really private?
Yes. TinyFoto does the entire operation inside your browser, using a library called pdf-lib. Files are not sent to any server — you can even disconnect from the internet after the page loads and the tool keeps working.
This matters because PDFs often contain sensitive info: bank details, personal documents, contracts. With tools that upload, those files pass through servers you don't control.
What if one of the PDFs is password-protected?
TinyFoto tries to open even protected PDFs, but some aggressive protection systems may block reading. In that case you need to remove the password first in the original software (Adobe Reader, Foxit, etc) and then merge.
Does it work on mobile?
Yes. Visit tinyfoto.com.br/pdf/juntar.html on Chrome (Android) or Safari (iPhone). Tap the upload area, pick PDFs from your files, reorder by dragging the ⋮⋮ with your finger, and download. The final file lands in the Downloads folder.
Summary
Merging PDFs is one of the simplest things to do online, but many people still install heavy programs or pay for tools that process server-side. With TinyFoto, you solve it in under 1 minute, keep your files private, and it even works offline after the first load.