This page will display tag support and CSS support amongst e-readers. This was all tested using an ePub or MOBI file, all well-formed. Note that MOBI does not directly support any CSS. Instead the KindleGen or other conversion tool must translate the source CSS into something MOBI format can understand.
For MUCH easier reading/editing of this document, it now lives as a google doc - Device Compatibly on Docs.google google doc that everyone can edit. The table listed below is a snapshot in HTML format and may not reflect the latest changes but it easier for MobileRead users to search.
[edit] Legend
| NT |
Not Tested
|
| - |
Not Supported
|
| + |
Supported
|
[edit] HTML Compatibility
| Device → Tag ↓
|
iBooks
|
Nook Color
|
Kindle 2
|
Kindle App on iPad
|
Kindle App on Android Tablet
|
Nook App on iPad
|
Nook App on Android
|
Kobo
|
Kobo App on the iPad
|
Sony PRS505
|
BlueFire
|
| H1-H6 |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| div |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| p |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| blockquote |
+ |
+ |
NT |
NT |
NT |
+ |
+ |
+ |
+ |
NT |
+
|
| img |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| hr |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| pre |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| ol with more than 9 entries |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
- [1] |
NT |
NT |
NT
|
| ol->li |
+ |
+[2] |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| ul->li |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| dl->dt->dd |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| em |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| strong |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| small |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| q |
+ |
- |
NT |
NT |
NT |
NT |
- |
- |
+ |
NT |
+
|
| i |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| b |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| u[3] |
+ |
+ |
NT |
NT |
NT |
NT |
- |
NT |
NT |
NT |
+
|
| sub |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| sup |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| code |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| samp |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| var |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| kbd |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| span |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| ins |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| del |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| abbr |
+ |
+ |
NT |
NT |
NT |
NT |
NT |
- |
- |
NT |
+
|
| dfn |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
- |
NT |
+
|
| cite |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
table->thead
->tr->td->tfooter |
+ |
+ |
NT |
NT |
NT |
NT |
NT |
- |
+ |
NT |
+
|
[edit] CSS Compatibility
| Device → Property ↓
|
iBooks
|
Nook Color
|
Kindle 2
|
Kindle Fire
|
Kindle App on iPad
|
Kindle App on Android Tablet
|
Nook App on iPad
|
Nook App on Android
|
Kobo
|
Kobo App on the iPad
|
Sony PRS505
|
BlueFire
|
| :first-child |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
-
|
| :first-line |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
- |
+ |
NT |
-
|
| :first-letter |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
- |
+ |
NT |
-
|
| :before |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
- |
NT |
NT |
-
|
| :after |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
- |
NT |
NT |
-
|
| position:relative |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
- |
+ |
NT |
NT
|
| position:absolute |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
- |
+ |
NT |
NT
|
| float |
+ |
+ |
- |
+ |
NT |
- |
NT |
+ |
+ |
+ |
NT |
+
|
| display |
+ |
+ |
NT |
+ |
NT |
NT |
NT |
NT |
+ |
+ |
NT |
NT
|
| display |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
+
|
| display:inline |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
-[4] |
NT |
NT |
+
|
| overflow |
+ |
+ |
NT |
NT |
NT |
NT |
NT |
+ |
- |
+ |
NT |
+
|
| background-color |
+ |
+ |
+[5] |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| height/width |
+ |
+ |
NT |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| margin |
NT |
NT |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
+[6] |
NT |
+
|
| padding |
NT |
NT |
- |
NT |
NT |
NT |
NT |
NT |
+ |
+ |
NT |
+
|
| page-break-before (auto, always, avoid) |
+ |
+ |
NT |
NT |
NT |
NT |
NT |
+ |
+ |
- |
NT |
+[7]
|
| page-break-before (left, right) |
- |
NT |
NT |
NT |
NT |
NT |
NT |
+ |
NT |
NT |
NT |
NT
|
| page-break-after (auto, always, avoid) |
+ |
+ |
NT |
NT |
NT |
NT |
+ |
NT |
+ |
- |
NT |
+[8]
|
| page-break-after (left, right) |
- |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT
|
| page-break-inside |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT
|
| font-size |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
+ |
+[9] |
NT |
+
|
| font-style |
+ |
+ |
NT |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+[10]
|
| font-weight |
+ |
+ |
NT |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| text-indent |
+ |
+ |
NT |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| text-align |
+ |
+ |
NT |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| text-decoration |
+ |
+ |
NT |
NT |
NT |
NT |
NT |
+ |
+ |
+ |
NT |
+
|
| letter-spacing |
+ |
- |
NT |
NT |
NT |
NT |
NT |
- |
- |
+ |
NT |
-
|
| word-spacing |
+ |
- |
NT |
NT |
NT |
NT |
NT |
- |
- |
+ |
NT |
-
|
| text-transform |
+ |
- |
+ |
+ |
NT |
NT |
NT |
- |
- |
+ |
NT |
-
|
| text-shadow |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT
|
| line-height |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
+
|
| div after p |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
+
|
| position |
+ |
- |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
+
|
[edit] NCX Compatibility
| Device → Feature ↓
|
iBooks
|
Nook Color
|
Kindle 2
|
Kindle App on iPad
|
Kindle App on Android Tablet
|
Nook App on iPad
|
Nook App on Android
|
Kobo
|
Kobo App on the iPad
|
Sony PRS505
|
BlueFire
|
| Nesting navPoints |
+ |
- |
- |
NT |
NT |
NT |
NT |
- |
+ |
+ |
NT
|
| Spine files omitted from navMap |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
+[11] |
- |
NT |
NT
|
- ↑ Test with Kobo Glo and Firmware 2.8.1: numbers with more than 1 numeral are shown with only the first numeral. "1" instead of "10" or "12". Kobo knows the bug since at least October 2012.
- ↑ Nook Color ... ordered lists ???
- ↑ The underline <u> tag was deprecated in XHTML 1.0 Transitional, and removed from XHTML 1.0 Strict and XHTML 1.1, and thus isn't valid in an EPUB.
- ↑ Test with Kobo Glo and Firmware 2.8.1
- ↑ Kindle 2 only displays background color in table cells
- ↑ Kobo App on the iPad does not support margin-top or margin-bottom.
- ↑ BlueFire: only tested "always"
- ↑ BlueFire: only tested "always"
- ↑ Kobo App on the iPad only supports font-size on inline tags, e.g. span.
- ↑ BlueFire: "oblique" doesn't appear to be supported
- ↑ Kobo displays files omitted from navMap, but bought books will be preprocessed to add all such files to the TOC, using the file's first handful of words as its title.
[edit] For more information
