Reduce document size in your browser. Free, private, and unlimited — no uploads, no install.
Drag & drop your files here
Max 20 files • Max file size: 200MB• Accepted: .epub
Browser-based — no install, no upload.
Drag & drop or browse — up to 20 files (200MB each). Everything stays in your browser.
Choose Lossless, Balanced, E-Reader Optimized, Maximum, or Target Size.
Files get a "_compressed" suffix. Chapter order, TOC, and formatting are preserved.
Everything about compressing EPUB files.
Yes — typically 30–70% reduction depending on content. EPUB is a ZIP archive; repacking with maximum compression and optimizing embedded content reduces size significantly.
No. All processing happens locally in your browser. Your files never leave your device.
Text, chapter order, table of contents, and navigation are always preserved. Compression targets file structure and embedded assets.
Reduce file size in your browser. Files stay private — never uploaded.