Palitan ang Iyong EPUB Cover Kaagad
I-upload ang iyong EPUB file at bagong cover image, pagsamahin sila sa iyong browser, at i-download ang resulta. Gumagana sa iPhone, Android, Kindle, Kobo, at bawat e-reader.
Cover Changer
I-drop ang iyong EPUB at bagong cover image sa ibaba. Isasama namin sila para sa iyo.
GUMAGANA SA LAHAT NG LUGAR
Palitan ang EPUB Cover sa Anumang Device
Kahit anong e-reader o telepono ang ginagamit mo, ang EPUB Cover Changer ay gumagana nang direkta sa iyong browser — walang karagdagang software na kailangan.
iPhone & iPad
Palitan ang EPUB cover sa iPhone o iPad gamit ang Safari, Chrome, o anumang mobile browser. Ang bagong EPUB ay na-download diretso sa iyong Files app, handa nang i-import sa Apple Books.
Android
Palitan ang EPUB cover sa anumang Android phone o tablet. Gumagana sa Moon+ Reader, Lithium, at iba pang Android reading apps.
Kindle, Kobo & Iba Pa
Palitan ang EPUB cover para sa Kindle, Kobo, Nook, o anumang e-reader. Palitan ang cover pagkatapos ay i-transfer via USB o email.
PAANO ITO GUMAGANA
Tatlong Hakbang para sa Bagong Cover
I-upload
I-drag at i-drop ang iyong EPUB file at bagong cover image sa dalawang slots. Lahat ay nananatili sa iyong browser.
Palitan
I-click ang palitan na button at panoorin ang iyong mga files na magsama. Ang processing ay tumatagal lamang ng ilang segundo.
I-download
Ang iyong bagong EPUB na may napalitan na cover ay handa na. I-download kaagad — walang sign-up, walang watermark, walang limitasyon.
BAKIT PILIIN
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.
SA ILALIM NG HOOD
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
Madalas Itanong
Anong mga format ang sinusuportahan?
May limitasyon ba sa laki ng file?
Na-upload ba ang aking mga file saanman?
Anong mga dimensyon ng image ang dapat kong gamitin?
Paano palitan ang EPUB cover sa iPhone?
Maaari ba akong magpalit ng EPUB cover sa Kindle?
Paano palitan ang EPUB cover nang walang Calibre?
Ano ang pinakamahusay na libreng EPUB cover changer?
Handa na bang Baguhin ang Iyong EPUB Cover?
Libre. Walang sign-up. Gumagana sa iPhone, Android, Kindle, at lahat ng e-reader.
Simulan Na