Content should display identically whether sideloaded or downloaded to a device from the Kobo store. Kobo encourages the testing of content on all its reading platforms by sideloading.

EPUBs that raise warning flags may pass ingestion but still fail content QA if they produce display issues on Kobo's reading platforms. Not all EPUBCheck flags will result in files failing upon ingestion but Kobo strongly recommends that only files that pass EPUBCheck without flags are distributed. If your EPUB raises failure messages that are known to prevent files from loading or displaying correctly you will receive an automated failure report indicating which files failed validation and why within two business days. The Kobo CMS runs incoming files through EPUBCheck version 4.2.4.

Windows - all tablets, smartphones and computers running Windows apps.

Android - all Android devices running the Kobo app including all Kobo Arc versions.

Desktop - the Kobo desktop app for PC and Apple Computers.

eInk/EPD - Kobo eInk devices (Touch, Mini, Glo, H2O, Aura, Aura Edition 2, Aura H2O, Aura One, Clara HD, Forma).

Kobo Serves Content to Users on These 5 Reading Platforms mobi, KF8, PDF or any format outside of EPUB that may be used to format eBooks. The following covers which elements are supported across Kobo’s reading platforms. Kobo supports a subset of elements from the EPUB 3 spec. Content creators are advised to review the HTML5 and CSS3 reference profiles because changes to them could impact file production. The EPUB 3.2 spec is based on HTML5 and CSS3, adhering to the most recent versions. As a result the display of Fixed Layout content may not always match the display across other Kobo reading platforms. **Fixed Layout content display on Sony Readers is dependent on the capabilities of Adobe SDK. *The Kobo Vox and Blackberry apps both run older versions/ports of the Android app and will not be updated. The current version is EPUB 3 but Kobo still supports its predecessor, EPUB 2.0.1.Īny EPUB file sent to Kobo will be made available on all of Kobo's reading platforms.

Kobo supports ePub, the universal open standard eBook format maintained by the W3C EPUB3 Community Group (W3C). Two Pages Display in Portrait Orientation on Android.Audio Video Issues on Android and iOS Platforms.Recommendations on file production and testing for content creators.Features of the five Kobo reading platforms.Elements of the EPUB spec that Kobo does and does not support.

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