01 · Navigation
Headings that navigate
leafbind classifies text by rendered font size, not font name — so your section headings become a working Kindle chapter list, not a wall of undifferentiated paragraphs.
01 · For Kindle Scribe
Built for the Kindle Scribe.
Reflowable text, footnotes that survive, academic papers that read like a book.
Not the Send-to-Kindle mess. Your file is never stored.
✓ academic-paper tested✓ multi-column ready✓ pay once, no subscription
leafbind.io / convert
free tier · pay once to unlock premium
02 · Formats
Drop in anything. Get out a Kindle file that opens.
Scanned PDF, messy EPUB, ancient AZW — leafbind normalizes the input and produces a Kindle-ready file with the table of contents, footnotes, and reflow intact.
Inputs
PDFEPUBMOBIAZWAZW3DJVU
bind
Outputs
EPUBMOBIKFX
KFX is premium — Kindle's native enhanced typesetting format.
From drop to download in four steps.
- 01
Drop a file
PDF, EPUB, MOBI, AZW, AZW3, or DJVU. Up to 20 MB on the free tier; 100 MB on premium.
- 02
Pick a format
EPUB or MOBI on free. Premium adds KFX — Kindle's native enhanced typesetting format.
- 03
We convert
Smart heading detection, bidirectional footnote linking, and column-aware extraction run automatically.
- 04
Download
Grab the file and side-load it, or email it to your Kindle. Your source is wiped within 24 hours.
The parts other converters skip.
02 · Footnotes
Footnotes that jump
Superscript markers are matched to their footnote bodies and linked bidirectionally. Tap a citation number on your Kindle to jump to the note; tap the return link to come back.
03 · Columns
Columns in order
Multi-column academic papers are read column by column, not line by line across the full page width. IEEE papers, arXiv preprints, and ACM proceedings come out readable.
Things you'll ask anyway.
Does leafbind store my files?
No. Your file lives only inside the conversion job slot, and it's wiped within 24 hours regardless of outcome. No accounts, no ads, no cross-site tracking — and nothing is ever shared with third parties or used to train models. We use Plausible for aggregate visit counts only — no cookies, no personal data, no IP storage.
What's the difference between free and premium?
Free runs your PDF through Calibre for a quick EPUB or MOBI. Premium runs leafbind's smart pipeline — column-aware extraction, font-size-based heading detection, bidirectional footnote linking, and KFX output. See the quality page for side-by-side examples on real books.
Why does Kindle care about KFX?
KFX is Kindle's native enhanced typesetting format. Pagination, hyphenation, and reflow all render noticeably better than EPUB or MOBI on the device. For long-form text — academic books especially — the difference is visible at a glance.
What if my conversion fails?
Credits are consumed when conversion begins. If a conversion fails for technical reasons (not user error), contact support and we'll refund the credit. Your token stays valid for the full 30-day expiry and you can retry. If you've already lost track of your token, you can recover it by email.
Convert your first book — free.
Drop a PDF, pick a format, get a Kindle file. No account required. Pay only if you want premium output (KFX, larger files, smart pipeline).
Start converting