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Convert a PDF for your Kobo

EPUB is what a Kobo reads natively, so there's no conversion step at the device end. Drop a PDF here, copy the EPUB across, done. Nothing gets uploaded on the way.

Read in this tab. Never uploaded. Here's why that's true.

EPUB
Kobo's native format
0
bytes uploaded
Free
no account, no cap

Kobo has the easier job here

Unlike a Kindle, a Kobo reads EPUB directly. There's no ingester converting things behind the scenes and no account to route the file through. What you copy across is what the device reads, which means the quality of the conversion is entirely down to what happens in this tab.

Copying it over

Kobo's own format list puts EPUB, EPUB2 and EPUB3 first, so there's nothing to convert on the device. A cable is the route that works on every model:

  1. Plug the Kobo into your computer with the USB cable. It mounts as a drive.
  2. Drop the EPUB anywhere on that drive, or into a folder if you like keeping things tidy.
  3. Eject the drive properly and unplug.
  4. The Kobo indexes the new file and it turns up in your library.

If it doesn't appear, the usual culprit is ejecting mid-copy. Reconnect, check the file is really there and the size looks right, then eject again.

Some models can skip the cable. The Forma, Sage, Elipsa, Elipsa 2E and Libra Colour sync from Dropbox (firmware 4.18 or later) and Google Drive (4.37 or later). The catch is that the book then passes through Dropbox or Google on its way, which USB never does. The Clara models aren't on either list.

KEPUB, and whether you need it

KEPUB is Kobo's own extended flavour of EPUB. It gets you their reading statistics, page-turn animations and marginally better text rendering. A standard EPUB works fine without any of that and is the more portable file.

If you do want KEPUB, convert here first, then either send the EPUB to the Kobo from Calibre, which has converted to KEPUB on the way by itself since version 8, or run it through kepubify. Starting from our EPUB gives either one proper structure to work with, which they can't get from a raw PDF.

Getting decent results

Leave Split into chapters on. Kobo firmware is noticeably slower opening a single huge document than several smaller ones, and chapter splitting is what keeps the file sizes sane. Leave Remove page numbers and running heads on too, unless your document has an unusual header scheme.

Set the title and author before converting. Kobo sorts your library by both, and PDF metadata is very often the name of whatever program produced the file.

Nothing is uploaded

The converter is JavaScript running in your browser. Your file is read off your own disk, never sent anywhere, and there's no server involved that could keep a copy. You can check: open devtools, watch the Network tab, convert something. Or convert one file, disconnect from the internet entirely and convert another, which also works.

Related

Questions

Does a Kobo read EPUB directly?

Yes. EPUB is Kobo's native format, so there's no conversion step on the device and no account involved. Copy the file across and it appears in your library.

What about KEPUB? Should I convert to that instead?

KEPUB is Kobo's own flavour of EPUB, and it enables their page-turn statistics and slightly better rendering. A plain EPUB works perfectly well without it. If you want KEPUB, convert here and then send the EPUB to the Kobo from Calibre, which has converted to KEPUB on the way since version 8, or run it through kepubify.

Can I send it to my Kobo without a cable?

On some models. Kobo supports Dropbox from firmware 4.18 and Google Drive from 4.37, but only on the Forma, Sage, Elipsa, Elipsa 2E and Libra Colour. Put the EPUB in the linked folder and it shows up on the device. USB works on every Kobo.

Why does my Kobo take ages to open the book?

Usually a single enormous chapter file. We split long chapters automatically for this reason, but a PDF with no bookmarks and no clear headings can still end up as one large document. Turning on chapter splitting helps.

Can I read PDFs on a Kobo without converting?

You can, and larger Kobos with bigger screens handle them better than a six-inch Kindle does. But it's still a fixed page: no reflowing, no font size changes, and a lot of pinching on anything A4.

Does this work with Kobo Clara, Libra, Sage and Elipsa?

Yes, all of them. They all read standard EPUB, which is what this produces. Same for Nook and PocketBook.

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