Send-to-kindle delivering KFX format to more devices

[jhowell]

Originally Posted by MMM2

I've checked and confirmed that I get KFX now sending epub and it happend to me two days ago, but it happens with only English books, not the Japanes ones. (They are still azw3.) Does anyone have any idea why that is?

I tried sending a test book in Japanese and it was delivered in KF8 instead of KFX to the Kindle for Android app.

I also received the following email. In the past either a book went through or failed completely.

Dear Customer,

Thank you for using the Send to Kindle service. We are reaching out to let you know that a document, sent to your Kindle at 01:42 PM on Tue, Sep 26, 2023 GMT, contains incompatible elements for Kindle format conversion. We’ve still delivered the document so that you can read it with Kindle, but in its current format it won’t support the latest Kindle features for documents, including Kindle Scribe handwriting features.

To make document(s) compatible with Kindle format conversion:

• Split large tables into several smaller tables, align the direction of text in the tables, and remove drop-caps in the tables.
• Remove multi-media content such as audio, video, and SVG images.
• Remove mathematical equations.
• Remove images that contain linear gradients.
• Remove password protection or any other security settings.
• Remove any footnotes inside footnotes.
• Check the document can be opened on a computer.
• Make sure the document doesn’t have more than 8,000 pages.
• Try sending the document again via Send to Kindle for Web.

To learn more about converting documents to a Kindle format, please visit our help page. By downloading or using Send to Kindle, you agree to the terms here.

Regards,
Amazon Kindle Support

[hleo12]

I guess there's gotta be a cut off somewhere.
I download a document dated Nov 10, 2022 and it was delivered as KFX, but then I download another one dated Nov 1, 2022 and it was delivered as AZW3.
So I tested dates in between. It seems like the cutoff was between Nov 6 and 7.
I wonder what made them decide that every document from Nov 7 onwards could be delivered as KFX.

I'm still sad that I lost my margins, but someone on reddit made a Bookerly font with ligatures, and it's fun seeing the squiggly lines sprinkled throughout the page. So I guess I have that going on for me with this new update.

[innocenat]

I tried sending Japanese EPUB that was unpacked from official Amazon AZW3 with KindleUnpack, and got KF8 to both my Android and PW5. I didn't get any email though. My account is on Amazon Japan.

[nabsltd]

Originally Posted by hleo12

To anyone who knows, am I supposed to be using a different tag?

Try adding "amzn-et" to the CSS rule, so it looks like:

@media amzn-kf8, amzn-et {

}

[JSWolf]

Originally Posted by hleo12

Oh rip... This is bad. Negative margins won't work with the new format since I only tagged them as KF8 in CSS.

I tested a new book and it seems negative margins also don't work, even with the KFX tag.

To anyone who knows, am I supposed to be using a different tag?

Edit: I also downloaded an old doc I sent months ago and it's also in KFX now. RIP my margins...

Don't use send-to-Kindle. Problem solved.

[JSWolf]

Originally Posted by nabsltd

Try adding "amzn-et" to the CSS rule, so it looks like:

@media amzn-kf8, amzn-et {

}

You don't need media queries for negative margins.

Here is the CSS code I use at the top of the CSS.

html {
  margin-right: -45px;
  margin-left: -45px;
  break-inside: avoid !important;
}

[j.p.s]

Remove multi-media content such as audio, video, and SVG images.

SVG images are multi-media content???

[Neil]

OK, my earlier problem with the inability to send epub files via Send to Kindle web and app areas has disappeared as mysteriously as it happened. All of the test files that failed now work. FWIW, probably nothing, I notice that now the files are converted to KFX and happen faster. Possibly as they switch servers to KFX transfers from epub that sets everything to off for day or so. Which, of course, then anables them to enail all sorts of facetious help files.

[tomsem]

For me, the promotion of Print Replica personal documents for the Kindle apps is at least as significant as the promotion of KFX. PDFs have always been orphans.

Print Replica supports annotations that sync, and have a functional table of contents. So far none of the other Kindles support this for personal documents but presumably they will at some point.

I do hope they improve presentation options with the apps: dark mode, margin adjustment, facing page mode, cover thumbnail (from first page).

It would make sense to have other platforms (e.g. iPadOS, Fire 11 Max) be able to use stylus for drawing on them as you can with Scribe, and create Sticky notes for KFX. And Notebooks there as well.

[hleo12]

Originally Posted by JSWolf

You don't need media queries for negative margins.

Here is the CSS code I use at the top of the CSS.

html {
  margin-right: -45px;
  margin-left: -45px;
  break-inside: avoid !important;
}

is the break-inside part the one for hyphenations?

[MMM2]

Originally Posted by jhowell

I tried sending a test book in Japanese and it was delivered in KF8 instead of KFX to the Kindle for Android app.

I also received the following email. In the past either a book went through or failed completely.

Originally Posted by innocenat

I tried sending Japanese EPUB that was unpacked from official Amazon AZW3 with KindleUnpack, and got KF8 to both my Android and PW5. I didn't get any email though. My account is on Amazon Japan.

Thank you! So the Japanese language is somehow preventing them from being converted to KFX...? I didn't get any email either, maybe because I sent the epubs from amazon.co.jp/sendtokindle? I don't know...

We’ve still delivered the document so that you can read it with Kindle

Usually I buy books from Amazon kindle, and as long as they keep doing this (and I can send books via email, I get the covers and in KF8 format,) I'm okay, I guess.

[nabsltd]

[QUOTE=JSWolf;4359104]You don't need media queries for negative margins.
You do if you want to read the EPUB on something other than a Kindle.

[hleo12]

Just to note.
My notes and highlights for the new KFX documents seem to have been deleted. All the books that got turned into kfx have all my notes missing. I tested with a book prior Nov 2022 that didn't get turned to kfx and it still has my highlights and notes.

[Gone]

Tried to send an ePub via the Amazon web page. Worked great on my iPad and Mac Kindle apps.

If only Amazon was "reading" more metadata then only the title and author, like the book summary and collections tags, that would be awesome.

[tomsem]

Originally Posted by hleo12

Just to note.
My notes and highlights for the new KFX documents seem to have been deleted. All the books that got turned into kfx have all my notes missing. I tested with a book prior Nov 2022 that didn't get turned to kfx and it still has my highlights and notes.

Interesting.

After getting a Scribe, I went through my personal documents and replaced most of them with ones generated from ePub files. I can annotate these on KFX capable devices and they show up on my (only) non-KFX capable device and vice versa.

I don't remember when Send To Kindle began accepting ePub, and I do still have a number of personal documents that I sent in prior to Nov, but if these were ePub, they all download as KF8.

In at least one case, an ePub I sent after Nov downloaded as KFX but did not have cover thumbnail after opening/closing it. I re-sent it and now it does.

In short, I cannot reproduce this issue, but maybe I cannot reproduce your exact scenario.