--- source_url: "https://support.google.com/books/partner/answer/3316879?hl=en&utm_source=openai" title: EPUB files - Google Play Books Partner Center Help mirrored_at: 2026-08-29T01:00:59.405Z host: support.google.com cited_in_42a: true mirror_canonical: "https://index.42a.ai/support.google.com/books/partner/answer/3316879__q__hl_en__utm_source_openai" --- > **Original source:** https://support.google.com/books/partner/answer/3316879?hl=en&utm_source=openai ## EPUB files EPUB is an open-standard file format for digital books developed by the [International Digital Publishing Forum (IDPF)](http://idpf.org/epub). One of the main benefits of the EPUB format for readers is that it allows a book's text to automatically adjust or "reflow" for different screen sizes, such as those for smartphones, netbooks and eReader devices. EPUB also supports fixed-layout content. ### On this page: - [Whether to submit EPUB or PDF files](#epub-pdf) - [Supported versions](#versions) - [Validating EPUB files](#validate) - [Optimizing your EPUB sample](#sample) - [Enhanced EPUB support](#enhanced) - [Fixed-layout EPUB support](#fixed-layout) ## Whether to submit EPUB or PDF files We recommend that you send us both PDF and EPUB files for your books, as we offer our users two display modes: original pages and reflowable text. Providing the PDF file for your book will ensure that readers can view the book in its original layout, while the EPUB file will allow them a more customizable experience. In this case, users will have access to a "reflowable text" option in addition to the "original pages" option. They will be able to resize the text, change the font, and view the book more comfortably on screens of varying sizes. Most major publishers are supplying EPUB files to us. ## Supported versions Google Play Books accepts [EPUB3.3](http://www.w3.org/publishing/epub33/#sec-doc-rec),[EPUB 3](http://idpf.org/epub/301) and [EPUB 2](http://idpf.org/epub/201), though 3.3 is preferred. ### Supported image types - Static GIF - JPEG - PNG - SVG (maximum width or height of 3200) See the section below on [enhanced EPUB support](#enhanced) for more information on other multimedia types. ### Implementation Example: `` The 3200px limit applies to `width` and `height` attributes present in the `` and/or `` tags, and any file referenced by the `` tag. ### EPUB 3 feature support Individual features of EPUB 3 may not be supported across all the platforms where Google Play Books can be read. Embedded audio and video ✔ Embedded fonts ✔ Fixed layout ✔ Global language support ✔ Hyperlink ✔ JavaScript ✘ MathML ✘ Media overlays ✔ Multi-column layouts ✘ Navigation document rendering (`toc nav` element only) ✔ Navigation document rendering (other element types) ✘ SVG spine items ✔ ## Validating EPUB files Prior to uploading your EPUB files, try to open them using an eReader program such as Adobe Digital Editions. If you're able to open the files using eReader software, this is a good indicator that the file will be successfully processed by our system. An additional step you should take is to run the [EpubCheck tool](https://github.com/IDPF/epubcheck), a tool to validate EPUB files, to ensure that there are no errors in the files you generated.  If you encounter issues while processing an EPUB file, these errors will appear in your [Partner Center](https://play.google.com/books/publish/redirect#list) account under the **Content** tab for the book. ## Optimizing your EPUB sample To provide a better experience for customers when they browse your book in the Google Play store, indicate where the content starts (after any front matter material such as the title page or copyright page). This allows the sample to begin from that point instead of making customers flip through extra pages. - For EPUB 2, inside the `guide` element, include a `` element with a `type="text"` attribute. See the [EPUB 2.0.1 specification](http://www.idpf.org/epub/20/spec/OPF_2.0.1_draft.htm#Section2.6). - This feature isn't available yet for EPUB 3. For future implementation, inside the `landmarks nav` element, include a link with an `epub:type="bodymatter"` attribute. See the [EPUB 3.0.1 specification](http://www.idpf.org/epub/301/spec/epub-contentdocs.html#sec-xhtml-nav-def-types-landmarks). ## Enhanced EPUB support Enhanced eBooks take advantage of the digital medium to include multimedia or interactive elements. Google Play Books supports audio and video embedded in EPUB 2 and EPUB 3 files. ### Implementation Audio or video embedded in an EPUB file should be contained in HTML5 tags, such as in the examples below: `` `` `` Only the following attributes will be parsed by Google Play Books: - `src`: Defines the location of the file for video and audio. - `width` and `height`: Dimensions for video. - `poster`: Defines a static image for the video. Google supports image formats specified in EPUB specifications (static GIF, JPEG, PNG, and SVG images). Additional attributes will be ignored. ### Formats We support a wide variety of audio and video formats: - **MPEG-4**, **3GPP** and **MOV:** typically supporting H.264 or MPEG-4 video codecs, and AAC audio codec - **WebM:** VP8 video codec and Vorbis audio codecs - **MPEG:** typically supporting MPEG-2 video codec and MP2 audio - **WMV** - **FLV:** Adobe-FLV1 video codec, MP3 audio - **AVI:** many cameras output this format; typically the video codec is MJPEG and audio is PCM - **MP3**, **WAV**, **M4A**, **MP4**, **3GP** for audio ### Unsupported features - Google Play Books doesn't support non-standard audio or video tags, or interactive functionality such as that enabled by JavaScript code. - The ability to embed audio is limited to EPUB files and doesn't allow for the submission of standalone audio books. ## Fixed-layout EPUB support When the design of a page is particularly important, you may want to implement a fixed layout, which offers greater control over the presentation of your content. Google Play Books supports fixed layout in EPUB 2 and EPUB 3 files. We recommend that you review fixed-layout EPUB files before they go live. After you upload a fixed-layout EPUB file, [add yourself as a Content Reviewer](https://support.google.com/books/partner/answer/3156893) and verify that the book displays as intended in the Web Reader. If possible, do the same for the tablet version of the Google Play Books Android app. ### Implementation Google Play Books supports [fixed-layout properties](http://www.idpf.org/epub/301/spec/epub-publications.html#sec-package-metadata-fxl) for EPUB 3 files. Alternatively, the below method works for both EPUB 2 and EPUB 3 files. - Include the file `META-INF/com.apple.ibooks.display-options.xml`. - Specify layout in XHTML items by adding `` Only the following values in the `META-INF/com.apple.ibooks.display-options.xml` file will be parsed: `                 ` For `orientation-lock`, the `portrait-only` value is also supported. Additional attributes, such as the following, will be ignored: - `platform name`: if different than `*` - `open-to-spread`: always set to `false` Please refer to the [BISG Field Guide to Fixed Layout for Ebooks](https://bisg.site-ym.com/store/ViewProduct.aspx?id=6974109) (available in English) for more information, referencing the "Google Play Books" section. The "EPUB Fixed Layout Lessons" chapter may also be helpful, as it describes some common issues.