Is this PDF to EPUB converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple PDF files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

Will my document formatting survive conversion?

Standard formatting — text, headings, bold/italic, tables, and inline images — transfers reliably. Complex layouts with floating objects, custom fonts, or SmartArt may simplify. Always give the output a quick review before sharing.

Can I convert a password-protected document?

No — encrypted files can't be read without decryption, and we never ask for passwords. Remove the password protection first, then convert.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

PDF to EPUB Converter — Free, Online, No Upload

How to convert PDF to EPUB online

1
Drop your PDF file
Drag and drop your Portable Document Format file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Portable Document Format → Electronic Publication entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your EPUB
Your Electronic Publication file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

PDF vs EPUB: format overview

PDF

Portable Document Format

Adobe Systems (John Warnock) · 1993

Compression: lossless
Transparency: No

✓ Fixed layout — looks identical on every device
✓ Embeds fonts, images, and vector graphics
✗ Not editable without Acrobat or similar

EPUB

Electronic Publication

International Digital Publishing Forum · 2007

Compression: lossless
Transparency: No

✓ Reflowable text — adapts to screen size and font preference
✓ Open standard — not locked to Amazon

PDF magic bytes: 25 50 44 46

EPUB magic bytes: 50 4B 03 04 (ZIP-based)

Why convert PDF to EPUB?

PDF was designed for fixed-layout printing: every element is pinned to an exact position on a page that assumes a specific paper size and screen width. On a Kindle, Kobo, or Pocketbook, that fixed layout becomes a problem — the text does not reflow to fit the device's screen, so you either read tiny text with horizontal scrolling or pinch-zoom through every paragraph. Academic papers, research reports, and digitised books distributed as PDF are genuinely uncomfortable to read on an e-reader for this reason.

EPUB is the native format for e-readers. Text reflows to fit any screen size, the device's font size and line-spacing settings work properly, chapters appear in the table of contents, and the reading experience matches a book bought from a store. Kindle users can sideload EPUB via Calibre or send it directly to a device email address. Kobo accepts EPUB natively over USB. The Apple Books app on iPhone and iPad also reads EPUB without any additional software.

Be aware that this conversion works best on text-heavy PDFs with simple layouts — novels, reports, and single-column non-fiction. Multi-column academic papers, PDFs that are scanned images rather than selectable text, and heavily formatted documents with tables, sidebars, or footnotes will produce imperfect EPUB output. You may see scrambled reading order, missing images, or broken paragraphs. For those cases, treat the result as a starting point and clean it up in Calibre's EPUB editor before sending to your device.

Quality & file size: PDF to EPUB

Typical file sizes: PDF 100–500 KB → EPUB 300 KB–2 MB.

Both PDF and EPUB use lossless compression, so no quality is lost in conversion. The output EPUB file will be visually identical to the PDF source.

Color depth: PDF supports standard color, EPUB supports standard color.

Transparency: PDF does not support transparency. EPUB does not support transparency — transparent areas become solid white.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your PDF files are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.