Convert Electronic Publication files to any format — free, fast, and 100% private
or drag and drop files here
Max file size: 2GB
Convert EPUB files in seconds using WebAssembly
Files never leave your device — zero server uploads
No limits, no registration, no watermarks
EPUB (Electronic Publication) is the open standard for digital eBooks, maintained by the W3C. EPUB uses HTML/CSS for content rendering, making eBooks reflowable — text automatically adapts to different screen sizes, font preferences, and reading orientations. EPUB 3 supports fixed-layout pages, multimedia (audio, video), MathML, SVG graphics, JavaScript interactivity, and accessibility features (WCAG compliance, screen reader support). The format is supported by Apple Books, Google Play Books, Kobo, Nook, Calibre, and most e-reader apps (but not Amazon Kindle, which uses its own formats). EPUB files are essentially ZIP archives containing XHTML content, CSS stylesheets, images, and metadata. Converting to EPUB is essential for publishing digital books across the widest range of platforms and devices.
Select an output format below to convert your Electronic Publication file
Open Convert999 and upload your EPUB file by clicking "Choose Files" or dragging it into the converter.
Select the desired output format (e.g., PDF, JPG, PNG, DOCX, MP3, or any of 11+ supported formats).
Click "Convert Now" and download your converted file instantly. No waiting, no server processing.