Convert a PDF to MOBI
Convert PDF to KindleGen MOBI: reflowable text on every Kindle (Paperwhite, Oasis, Scribe), AI OCR for scans (80+ languages), multi-column linearization, 6/7/10-inch DPI optimization.…
Upload the ebook
Drop your .mobi, .azw3 or .pdf file — Kindle DRM not supported.
AI layout conversion
Our AI network plus GDPR-compliant server rebuilds typography, chapters, images.
Download the result
Get your file ready for Kindle, Bookeen, PocketBook or print.
Why choose iFillPDF
Reflowable text
Our AI rebuilds the PDF as fluid text adapted to 6-inch e-reader screens.
Optimized images
Smart compression to avoid overloading your Kindle memory.
AI network + GDPR-compliant server
Frankfurt (EU) hosting, AES-256 at rest, files deleted within 24h.
Convert any ISO 32000-1:2008 PDF — even 2-column scientific journals, 3-column magazine spreads or scanned 19th-century books — into a reflowable Mobipocket / KindleGen MOBI ebook readable on every Kindle ever shipped (1st-gen 2007 Kindle Keyboard through Paperwhite 12 and Scribe 2). AI runs Tesseract-grade 80+-language OCR on scanned PDFs, detects multi-column layouts, linearizes reading order (NCX spine), rebuilds chapter breaks from heading-level heuristics and embeds images at 6/7/10-inch e-paper-optimized DPI. Hosted on Hetzner Falkenstein eu-central-1 under TADPF — AES-256 at rest, TLS 1.3, SOC 2 Type II, ISO 27001:2022, GDPR Art. 5(1)(c), zero Cloud Act 50 USC §3024 / FISA 702 exposure, files purged within 24h.
Go further with lifetime access
E-signature proof log, business templates, no watermark. $8.99, one payment, for life — no subscription.
Frequently asked questions
Is it really free?+
Unlimited free use with a watermark and 0 AI Deep Detect, then $8.99/mo Start for 8 AI Deep Detect/mo.
Is my data private?+
Frankfurt (EU) hosting, AES-256 encryption at rest, files deleted within 24h. GDPR-compliant, never used to train third-party AI.
Does MOBI work on recent Kindles?+
Yes — every Kindle ever shipped, from the 1st-gen Kindle Keyboard (2007) through Paperwhite 12 (2024) and Scribe 2 (2024), still reads MOBI natively. However, Amazon retired KindleGen and the MOBI submission format on August 1, 2022 in favour of AZW3 (KF8) and EPUB via Send-to-Kindle (the new free service replacing the legacy Send-to-Kindle Email which Amazon also deprecated). For self-publishing through Kindle Direct Publishing today you should upload AZW3, EPUB or DOCX — but MOBI remains the most universally compatible format for sideloading via USB or Calibre. If your goal is sideloading to a personal device, MOBI is still the safe pick; if you're publishing for sale, use our /tools/pdf-to-azw3 ($0 free tier) or /tools/pdf-to-epub instead.
My PDF has columns (article, magazine), how does it work?+
Our AI runs a layout-detection pass that identifies column boundaries (the same approach Tesseract's LSTM engine and Adobe Acrobat Pro $19.99/mo "Reflow" mode use), then linearizes the reading order column-by-column to produce single-column flowing MOBI text — readable on the 6-inch screen of a Kindle Paperwhite without horizontal scrolling. We handle 2-column scientific journals (Nature, Cell, IEEE Transactions), 3-column magazine spreads (The Economist, National Geographic), 4-column newspaper PDFs (FT Weekend, NYT print edition) and right-to-left RTL Arabic / Hebrew PDFs natively. Footnotes are repositioned inline as Kindle pop-up notes (KindleGen INDX format), tables are converted to scrollable HTML5 tables, and equations from STEM PDFs are kept as embedded SVG images at 300 dpi — better fidelity than Calibre's open-source PDF→MOBI pipeline which often garbles 2-column layouts and renders equations as jagged 96-dpi PNGs.
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