Wijzig je EPUB Cover Direct
Upload je EPUB-bestand en een nieuwe coverafbeelding, combineer ze in je browser en download het resultaat. Werkt op iPhone, Android, Kindle, Kobo en elke e-reader.
Cover Wijzigen
Sleep je EPUB en een nieuwe coverafbeelding naar de sleuven hieronder. Wij combineren ze voor je.
WERKT OVERAL
Wijzig EPUB Cover op Elk Apparaat
Welke e-reader of telefoon je ook gebruikt, EPUB Cover Changer werkt direct in je browser — geen extra software nodig.
iPhone & iPad
Wijzig EPUB cover op iPhone of iPad met Safari, Chrome of een andere mobiele browser. De nieuwe EPUB wordt direct gedownload naar je Bestanden-app, klaar om te importeren in Apple Books.
Android
Wijzig EPUB cover op elke Android-telefoon of -tablet. Werkt met Moon+ Reader, Lithium en andere Android leesapps.
Kindle, Kobo & Meer
Wijzig EPUB cover voor Kindle, Kobo, Nook of elke e-reader. Wijzig de cover en draag over via USB of e-mail.
HOE HET WERKT
Drie Stappen naar een Nieuwe Cover
Uploaden
Sleep je EPUB-bestand en de nieuwe coverafbeelding naar de twee sleuven. Alles blijft in je browser.
Wijzigen
Klik op de Wijzigen-knop en bekijk hoe je bestanden worden gecombineerd. Verwerking duurt slechts enkele seconden.
Downloaden
Je nieuwe EPUB met de gewijzigde cover is klaar. Download direct — geen registratie, geen watermerk, geen limieten.
WAAROM KIEZEN
Why EPUB Cover Changer Is Different
Unlike generic online converters, EPUB Cover Changer is built specifically for EPUB cover replacement with a focus on privacy, performance, and format fidelity.
True Client-Side Processing
Every file operation — ZIP extraction, image replacement, manifest updates, and repackaging — runs inside your browser using JavaScript and Web APIs. No server ever sees your EPUB or cover image. This is not just a privacy claim; it is an architectural guarantee verified by inspecting the browser's Network tab: zero upload requests.
Full EPUB Format Preservation
EPUB Cover Changer replaces only the cover image and updates the OPF manifest and metadata accordingly. All other content — chapter files, CSS stylesheets, embedded fonts, navigation, and NCX/NAV documents — remains untouched. The tool handles EPUB2, EPUB3, and Kobo Kepub formats with proper MIME type detection and container.xml parsing.
Adaptive Performance
The tool dynamically adjusts file size limits based on your device's memory (navigator.deviceMemory API) and CPU cores. Low-end phones get 50 MB EPUB / 10 MB image limits; high-end devices handle up to 500 MB / 100 MB. This prevents browser crashes while maximizing capability on powerful hardware.
Broad Format Support
Accepts 9 image formats including HEIC (iPhone photos) and WebP. The cover image is automatically converted to the optimal format for EPUB compatibility. EPUB inputs support standard .epub, Kobo .kepub.epub, and any valid EPUB2/EPUB3 container — no pre-conversion needed.
ONDER DE MOTORKAP
How EPUB Cover Replacement Works
Understanding the technical process helps you trust the tool and troubleshoot any issues. Here is exactly what happens when you click the Change Cover button.
EPUB Extraction
The EPUB file is loaded into memory as an ArrayBuffer and parsed using JSZip. An EPUB is essentially a ZIP archive containing XHTML, CSS, images, and metadata files. The tool reads the META-INF/container.xml to locate the OPF package document, which is the manifest for the entire book.
Cover Image Identification
The tool scans the OPF manifest for the cover image reference. In EPUB2, this is the item with id="cover-image" or referenced by the <meta name="cover"> element. In EPUB3, the properties="cover-image" attribute identifies the cover. Multiple detection strategies ensure compatibility with non-standard EPUBs.
Image Processing & Replacement
Your new cover image is decoded, normalized to a standard format, and written into the EPUB archive at the correct path. The tool preserves the original image filename and directory structure to maintain manifest integrity. HEIC images are converted to JPEG or PNG since EPUB readers do not support HEIC natively.
Manifest & Metadata Update
The OPF manifest is updated to reflect the new cover image's MIME type and file size. If the EPUB includes a cover XHTML page, its <img> tag dimensions are updated. The EPUB metadata (<meta> and <dc:date>) receives a modification timestamp so e-readers recognize the updated file.
Repackaging & Download
The modified archive is compressed back into a valid EPUB using JSZip's DEFLATE compression with the correct mimetype entry (stored uncompressed as required by the EPUB specification). The resulting Blob is offered as a download with the original filename or a new one if you choose to rename.
FAQ
Veelgestelde Vragen
Welke formaten worden ondersteund?
Is er een bestandsgroottebeperking?
Worden mijn bestanden ergens geüpload?
Welke afbeeldingsafmetingen moet ik gebruiken?
Hoe wijzig ik de EPUB cover op iPhone?
Kan ik de EPUB cover op Kindle wijzigen?
Hoe wijzig ik de EPUB cover zonder Calibre?
Wat is de beste gratis EPUB cover changer?
Klaar om je EPUB-cover te wijzigen?
Gratis. Geen registratie. Werkt op iPhone, Android, Kindle en elke e-reader.
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