EPUB Cover Changer
Change or replace the cover image of your EPUB ebook files. View current cover and upload a new one.
Upload your EPUB file
Drag & drop or click to browse
Supports EPUB 2 and EPUB 3
Choose EPUB FileEPUB Cover Changer - Change Book Cover Image Online
An EPUB Cover Changer is a specialized tool that lets you view and replace the cover image of EPUB ebook files directly in your web browser. EPUB files are essentially ZIP archives containing HTML, CSS, images, and metadata — the cover image is stored as one of these files and referenced in the content.opf manifest. This tool reads your EPUB file, parses the content.opf to locate the cover image, displays it for preview, and then lets you upload a new cover image (JPG or PNG) to replace the original. The modified EPUB is then repackaged as a valid EPUB file ready for download.
What is an EPUB Cover Changer?
An EPUB Cover Changer is a specialized tool that lets you view and replace the cover image of EPUB ebook files directly in your web browser. EPUB files are essentially ZIP archives containing HTML, CSS, images, and metadata — the cover image is stored as one of these files and referenced in the content.opf manifest. This tool reads your EPUB file, parses the content.opf to locate the cover image, displays it for preview, and then lets you upload a new cover image (JPG or PNG) to replace the original. The modified EPUB is then repackaged as a valid EPUB file ready for download.
How Does EPUB Cover Replacement Work?
The cover image is auto-detected from content.opf — either via a <meta name='cover' content='...'> tag, a manifest item with properties='cover-image', or by convention as the first image. The tool parses these three detection methods to reliably locate your cover. Once located, the tool shows your current cover and lets you pick a target size using platform presets — Standard EPUB (1600x2400), Amazon Kindle (1600x2560), Apple Books (1600x2400), Kobo (1500x2000), or Google Play Books (1600x2400). You can also keep the original size or enter custom dimensions. Before replacement, the cover is previewed in a canvas editor where you can choose how the new image fills the frame — Cover (fill & crop), Contain (fit with white borders), or Stretch (force exact dimensions). The files are preserved at the same path and filename, keeping all internal references intact.
Why Use an Online EPUB Cover Changer?
Traditional EPUB editing requires desktop software like Calibre or Sigil, which need installation and have learning curves. An online tool works instantly in any modern browser with no installation required. All processing happens client-side in your browser — your EPUB file is never uploaded to any server. This ensures complete privacy for your books and documents. The file stays on your device from start to finish.
Supported EPUB Formats
This tool supports both EPUB 2 and EPUB 3 formats, which are the two main standards for EPUB ebooks. It works with DRM-free EPUB files from any source. Cover images can be replaced with JPG (JPEG) or PNG format images. The tool will display both the current cover and your new cover side-by-side before you confirm the replacement.
Common Use Cases
Self-published authors often need to update book covers after redesigns or A/B testing. This tool lets them quickly swap covers without re-uploading to distribution platforms. Book collectors and readers may want to standardize covers across their personal library, replace damaged or low-quality covers, or add custom covers to public domain ebooks. Publishers and editors can use this tool for quick cover proofing — uploading a new cover design to see how it looks inside the actual EPUB before official distribution.
How to Change EPUB Cover
Upload EPUB
Drag and drop or click to upload your .epub file. The tool parses content.opf and auto-detects the cover.
Add Cover
Pick a platform preset (Kindle, Kobo, Apple, Google) or keep original, then upload your JPG/PNG cover.
Preview & Download
Choose a fill mode, confirm the new canvas preview, then download the updated EPUB.
Why Use Our EPUB Cover Changer?
100% client-side processing — your EPUB file never leaves your browser Supports both EPUB 2 and EPUB 3 formats Auto-detects cover image via content.opf parsing Side-by-side preview of current and new covers Preserves all internal EPUB references and structure No software installation required — works in any browser Supports JPG and PNG cover images Instant download of modified EPUB file
EPUB Cover Changer vs Desktop Software
| Feature | This Tool | Desktop Software |
|---|---|---|
| Installation Required | No | Yes (Calibre, Sigil) |
| Privacy | Client-side, file never uploaded | Depends on software |
| Ease of Use | Upload, preview, replace, download | Learning curve |
| Speed | Instant in browser | Requires setup |
| Cost | Free | Free (Calibre) or Paid |
| Platform | Any browser, any OS | Desktop only |
Who Uses EPUB Cover Changers?
Frequently Asked Questions
Q. What is an EPUB file?
An EPUB file is an electronic publication format. It's essentially a ZIP archive containing HTML pages, CSS stylesheets, images, and metadata (including the cover image and book information).
Q. How does the tool find the cover image?
The tool parses the content.opf file inside the EPUB. It looks for the cover in three ways: meta tags with name='cover', manifest items with properties='cover-image', or the first image in the manifest.
Q. What image formats can I use for the new cover?
You can use JPG (JPEG) or PNG format images. The tool will preserve the filename structure to maintain compatibility with EPUB readers.
Q. Will replacing the cover break my EPUB?
No. The tool replaces the cover image data at the exact same path, preserving all internal references. The modified EPUB remains valid and readable.
Q. Is my EPUB file uploaded to a server?
No. All processing happens in your browser using JavaScript. Your EPUB file is never sent to any server — it stays on your device the entire time.
Q. Does this work with DRM-protected EPUBs?
No. This tool works with DRM-free EPUB files only. DRM-protected files need to be deDRM'd first (which may have legal restrictions depending on your jurisdiction).
Q. What platform presets are available?
The tool includes presets for Standard EPUB (1600x2400), Amazon Kindle KDP (1600x2560), Apple Books (1600x2400), Kobo (1500x2000), and Google Play Books (1600x2400). You can also keep the original size or enter custom dimensions — which is ideal when you already have a cover with the exact ratio you need.
Q. What are the fill modes for?
When the new image doesn't exactly match the target dimensions, fill mode determines how it fits: Cover (fill and crop to match), Contain (fit entirely with white borders), or Stretch (force exact dimensions). A live canvas preview shows exactly how the cover will look before you confirm the replacement.
Change EPUB book covers online for free. Auto-detects cover from content.opf, supports EPUB 2 and EPUB 3, 100% client-side. Try it now!
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