Turn a PDF into a reflowing e-book that fits any screen — chapters split on the document’s own headings, with a working contents list. Free in your browser — no sign-up, no watermarks.
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A PDF page is a fixed size. That is the point of the format and the reason reading one on a phone means pinching, panning and losing your place at the end of every line. An EPUB has no page size at all: the text reflows to whatever screen it is on, at whatever type size the reader has chosen, and remembers where you stopped. For anything you intend to actually read rather than print, it is the better format — and the conversion also gives you a contents list built from the document’s headings.
PDF is the universal document format: it locks layout, fonts and images so a file looks identical on every device and printer. Scans, invoices, forms, e-books and reports all travel as PDF. Because a PDF is a container rather than an image, turning its pages into JPG or PNG pictures — or bundling pictures into a PDF — are among the most common file tasks there are.
EPUB is the open e-book format every reader except Kindle uses natively — Apple Books, Kobo, Google Play Books, and most Android and desktop readers. Unlike a PDF it has no page size: the text reflows to whatever screen and type size the reader chooses, which is the whole reason e-readers exist.
| EPUB | ||
|---|---|---|
| Type | Document | Reflowable e-book |
| Compression | Mixed (per object) | ZIP (XHTML inside) |
| Typical use | Documents, scans, invoices, forms | E-readers, phones, tablets |
A PDF page is a fixed size. That is not a flaw, it is the entire purpose of the format — it exists so a page prints identically everywhere. The cost only shows up when nobody is printing it. On a phone the page is a picture you pinch and pan around, and every line means a sideways scroll; on an e-reader it is worse, because the screen is smaller than A4 and cannot reflow a single word of it.
An EPUB has no page size at all. The text flows into whatever screen it is given, at whatever type size the reader has chosen, and the device remembers where you stopped. For anything you intend to read rather than print, that is simply the right format.
The document is split at its top-level headings, so each chapter becomes its own file inside the book and the contents list is built from those headings. That is not tidiness for its own sake: an e-reader handed one giant file has to load and lay out the whole thing to turn a page, which is why some converted books are painfully slow to read. A contents list also means the reader’s own navigation works.
You gain reflowing text, adjustable type, working navigation and a file a fraction of the size. You lose the layout — deliberately, because the layout is the thing that does not fit. Fonts, columns, exact spacing, images and page numbers are not carried across; headings, paragraphs and lists are. A book, a report or a paper converts well. A magazine, a form or anything where the design carries meaning does not, and should stay a PDF.
Amazon accepts EPUB through Send to Kindle and converts it on their side, so the file works — but copying it onto the device over USB does not, because the Kindle does not read EPUB natively. Every other major reader — Apple Books, Kobo, Google Play Books, and the usual Android and desktop apps — opens it directly.
A scan is a picture of text, and there are no words in it to reflow. Run OCR PDF first so the text exists, then convert.
Yes — completely free, with no sign-up, no watermarks and no daily quota. Processing happens in this browser, so the practical limit is the memory available on your device.
Yes. Select or drop as many files as you like — each one is converted in sequence with its own progress status, and you can download the results individually or all together as a ZIP archive.
Amazon accepts EPUB through Send to Kindle, which converts it on their side, so yes — but not by copying the file onto the device directly. Every other major reader, including Apple Books, Kobo and Google Play Books, opens EPUB natively.
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