How this converter works
An EPUB is a zip archive containing HTML, CSS, images and fonts — essentially a small website that a reading app lays out on the fly. A PDF is the opposite: every page is fixed before you open it. Converting between them means deciding where the pages break, which is why two converters can produce very different results from the same book.
Your browser opens the file first
Before anything is uploaded, the file is opened in your browser to check that it is a real EPUB and to read its title, chapter count and language. If the file is damaged, DRM-protected or too large, you find out immediately and nothing is sent.
The book is rebuilt as one document
Chapters are joined in reading order, the stylesheet is kept, and every image, font and internal link is resolved. Anything that could run code — scripts, embedded objects, remote references — is removed at this stage.
A browser engine lays out the pages
The rebuilt document is rendered by a real browser engine using your chosen page size and margins. That is what keeps CSS, web fonts, right-to-left text and complex scripts looking the way the publisher intended.
The PDF is checked before you get it
The finished file is opened and verified — valid structure, at least one page, correct size — and given proper title and author metadata. If it fails that check it is discarded rather than handed to you.
What comes out the other side
- A clickable contents page. Built from the book’s own navigation, placed at the front, with every entry linking to its chapter.
- PDF bookmarks. The sidebar outline in your PDF reader is filled in, so you can jump between chapters without scrolling.
- Working links. Footnotes, cross-references and external links stay clickable.
- Real text, not pictures of text. You can search, select and copy from the PDF, and a screen reader can read it.
- A tagged PDF. The output carries a structure tree, which is what makes headings and reading order available to assistive technology. Most online converters skip this.
- The book’s own fonts. Embedded fonts are kept, including ones scrambled by the publisher’s font obfuscation, which many converters silently drop.
Settings, in plain language
Most people never need to open Advanced settings — the defaults reproduce the book as closely as a fixed page allows. If you do, here is what each control actually changes.
| Setting | What it does | When to change it |
|---|---|---|
| Page size | Sets the paper size of the finished PDF. | Letter for US printing, A4 for most of the world, A5 or E-reader for reading on a small screen. |
| Margins | The white space around the text on every page. | Wide if you plan to print and write notes; narrow to save pages. |
| Text size | Scales all text proportionally, including the book’s own relative sizes. | Increase it for easier reading; the Large text preset does this for you. |
| Image quality | How much images are re-compressed before they go into the PDF. | Original for photo books you will print; Small when the file needs to be emailed. |
| Chapter breaks | Whether each chapter starts on a fresh page. | Turn it off for a continuous document with fewer pages. |
| Contents page | Adds the generated, clickable table of contents at the front. | Turn it off if the book already includes its own contents page. |
| Page numbers | Prints a number in the footer of every page. | Useful for printing and for citing a passage. |
Why a converted PDF never matches the ebook exactly
This is the most common complaint about every EPUB to PDF converter, and it is worth being straight about the cause. An EPUB has no pages. The reading app creates them from your screen size and font choice, and it creates different ones on a phone than on a tablet. A PDF has to commit to one set of pages forever.
So a converter is not preserving a layout — it is inventing one. What can be preserved is everything else: the text, the styling, the images, the reading order, the links and the structure. That is what this converter optimises for.
- Images can land on a different page from the paragraph that mentions them. Narrower margins or a larger page size usually fixes it.
- Very wide tables may be clipped at the page edge. Landscape orientation gives them room.
- Fixed-layout EPUBs — comics, children’s picture books, some textbooks — are designed around specific page dimensions. Match the page size to the book’s own proportions for the best result.
- A book with no embedded fonts will be rendered with substitutes, so the type will look close but not identical.
If your result looks wrong in a way that is not on this list, the formatting troubleshooting guide goes through the causes one by one.
Converting on your device
This runs in a browser, so it works the same on every platform — but each one also has its own built-in route worth knowing about.
- WindowsWindows has had no built-in EPUB reader since Edge dropped support, which is why the browser route is usually simplest.
- MacmacOS can export from the Books app, with one significant limitation worth knowing first.
- iPhone and iPadUsing Files and Safari, and where the finished PDF ends up.
- AndroidChrome, the Files app, and handling books from other apps.
What happens to your file
Plainly, because most converters are vague about this: your file is uploaded to our server to be converted. There is no honest way to produce a high-quality, text-selectable PDF entirely inside a browser tab, and claiming otherwise would be a marketing line rather than a fact.
- The initial check — is it a real EPUB, is it DRM-protected, how many chapters — runs in your browser. Files that fail it are never uploaded.
- Uploads travel over HTTPS and are written to disk with a random identifier that is not guessable.
- The EPUB is deleted as soon as the PDF is produced.
- The PDF is deleted automatically after the retention period shown on this page, and the download link requires a separate secret token.
- Nobody browses the storage, and no uploaded file is used to train anything.
The full detail, including what our analytics and advertising do and do not collect, is in the privacy policy.
Limits, and why they exist
This is free and has no account, which means the limits are real infrastructure limits rather than an upsell. The maximum file size shown above the uploader is read from the server, so it is always the number the server will actually accept — you will never discover a cap after waiting for an upload to finish.
- There is a per-connection rate limit so one user cannot occupy the queue.
- A single conversion has a time limit. Very large illustrated books occasionally hit it; the Compact preset usually gets them through.
- Archives that expand enormously relative to their compressed size are refused, because that pattern is a decompression bomb rather than a book.
Frequently asked questions
Is it really free, and is there a watermark?
Yes, and no. There is no account, no trial, no watermark and no page limit on the output. The site is funded by advertising, which is kept out of the converter itself.
Do I need to install anything?
No. It runs in any current browser on any operating system, including phones and tablets.
Why does it say my EPUB is DRM-protected?
Books bought from most stores or borrowed from a library are encrypted so that only an authorised app can read them. No converter can read that text, ours included — it is not a limitation we can work around, and a tool claiming otherwise is either failing or breaking the law on your behalf. What DRM means for conversion explains how to tell and what your options are.
Will the table of contents work in the PDF?
Yes. A contents page is generated from the book’s own navigation and placed at the front with clickable entries, and the PDF outline — the bookmarks sidebar in your reader — is filled in as well. Both can be turned off in Advanced settings.
Can I convert several books at once?
Yes. Add multiple EPUB files and each is converted separately, with its own status. You can download them one at a time as they finish, and any that fail tell you why without affecting the rest.
What is the largest file I can convert?
The current maximum is shown directly above the upload area and comes from the server itself rather than being written into the page. If a book is over it, converting it in parts is the practical answer.
How long do you keep my files?
The EPUB is deleted the moment the PDF is produced. The PDF is deleted automatically after the retention period shown on this page, whether or not you downloaded it.
Will the PDF be searchable?
Yes. The output contains real text, so you can search, select and copy it, and a screen reader can read it aloud. It is not a set of page images.
Can I convert a PDF back into an EPUB?
Not yet. PDF to EPUB is on the roadmap, and it is a genuinely harder problem — going from fixed pages back to reflowable text means reconstructing structure that the PDF never recorded.
Does it handle books that are not in English?
Yes. The renderer handles Unicode throughout, including Indic scripts such as Gujarati and Hindi, Arabic and Hebrew with right-to-left page progression, and Chinese, Japanese and Korean text.
Guides worth reading
- How to convert EPUB to PDF— Three routes that actually work, what each one costs you, and how to choose between them.
- EPUB vs PDF— One format adapts to the reader, the other fixes the page. That single difference explains everything else.
- Why your converted PDF looks wrong— Jumbled images, clipped tables, missing chapters, enormous files. Each symptom has a specific cause.
- DRM-protected EPUB files— Why no converter can read an encrypted book, how to tell whether yours is one, and the legitimate ways forward.
- What is an EPUB file?— What is actually inside the format, how EPUB 2 and EPUB 3 differ, and what opens one.