For students & researchers
Turn readings and notes into booklets you’ll actually read.
Combine papers, slides and lecture notes into one compact booklet, with four pages on every sheet of paper: easy to carry, annotate and keep. Free, private, in your browser.

- 01
Combine everything
Merge several PDFs into one booklet and put the pages in the order you want.
- 02
Four pages per sheet
A5 pages printed two per side of A4: a quarter of the paper of single-sided printing.
- 03
Trim and mark up
Trim wide white margins automatically so the text prints larger, and highlight or add notes before printing.
- 04
Private drafts stay private
Unpublished papers and course material are never uploaded anywhere.
How to
A reading pack in four steps.
- 01
Add your PDFs
Drop in papers, slides and notes. Reorder them, or add just the page ranges you need.
- 02
Trim the margins
In the editor, trim white margins and apply it to every page of a file, so the text uses the whole page.
- 03
Choose a binding
Folded signatures make a booklet. Loose sheets are cut in half and stacked, ready for a corner staple.
- 04
Print double-sided
Export the PDF and print two-sided on the short edge at 100%.

14 days free
Try everything in Pro, free for 14 days.
No card needed and nothing to cancel. When the trial ends you go back to Free and keep every book you made.
Questions
Good to know.
Will the text be too small?
Each page prints at A5, which is about 71% of the width of A4. Trimming the white margins first makes the text noticeably larger.
Booklet or loose sheets?
A folded booklet is best for something you read cover to cover. Loose sheets (each sheet cut in half and stacked in order) suit long documents and are easy to staple in a corner.
Are my files uploaded?
No. Foldio runs entirely in your browser, and your files stay on your computer.
Is it free?
Yes. The Free plan covers folded books, stapled booklets, one-page zines and loose-sheet books, with no account, no watermark and no page limit. Pro adds more layouts and a cover designer, and you can try it free for 14 days with no card.
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