Ganti Sampul EPUB Anda Seketika
Unggah file EPUB Anda dan gambar sampul baru, gabungkan di browser Anda, dan unduh hasilnya. Berfungsi di iPhone, Android, Kindle, Kobo, dan setiap e-reader.
Pengganti Sampul
Letakkan EPUB dan gambar sampul baru di bawah. Kami akan menggabungkannya untuk Anda.
BERFUNGSI DI MANA SAJA
Ganti Sampul EPUB di Perangkat Apa Pun
Tidak peduli e-reader atau ponsel apa yang Anda gunakan, Ganti Sampul EPUB berfungsi langsung di browser Anda — tanpa perangkat lunak tambahan.
iPhone & iPad
Ganti sampul EPUB di iPhone atau iPad menggunakan Safari, Chrome, atau browser seluler apa pun. EPUB baru akan diunduh langsung ke app Files Anda, siap diimpor ke Apple Books.
Android
Ganti sampul EPUB di ponsel atau tablet Android apa pun. Berfungsi dengan Moon+ Reader, Lithium, dan app membaca Android lainnya.
Kindle, Kobo & Lainnya
Ganti sampul EPUB untuk Kindle, Kobo, Nook, atau e-reader apa pun. Ganti sampul lalu transfer melalui USB atau email.
CARA KERJA
Tiga Langkah ke Sampul Baru
Unggah
Seret dan letakkan file EPUB Anda dan gambar sampul baru ke dua slot. Semuanya tetap di browser Anda.
Ganti
Klik tombol ganti dan lihat file Anda digabungkan. Pemrosesan hanya membutuhkan beberapa detik.
Unduh
EPUB baru Anda dengan sampul yang diganti sudah siap. Unduh secara instan — tanpa pendaftaran, tanpa watermark, tanpa batas.
MENGAPA MEMILIH
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.
DI BALIK LAYAR
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
Pertanyaan yang Sering Diajukan
Format apa saja yang didukung?
Apakah ada batas ukuran file?
Apakah file saya diunggah ke mana pun?
Dimensi gambar apa yang harus saya gunakan?
Bagaimana cara mengganti sampul EPUB di iPhone?
Bisakah saya mengganti sampul EPUB di Kindle?
Bagaimana cara mengganti sampul EPUB tanpa Calibre?
Apa pengubah sampul EPUB gratis terbaik?
Siap Mengubah Sampul EPUB Anda?
Gratis. Tanpa pendaftaran. Berfungsi di iPhone, Android, Kindle, dan semua e-reader.
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