EPUB Reducer & Merger
Compress and merge EPUB files to reduce size while maintaining quality.
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About EPUB Reducer & Merger
Optimize your digital library with our EPUB reducer. This tool allows you to compress large ebook files by downsizing internal images and merging multiple titles into a single volume, making them perfect for devices with limited storage.
How to Use
- Upload one or more EPUB ebook files.
- Configure settings like 'Shortest Dimension Resolution' or 'Grayscale' to maximize space savings.
- Toggle 'Merge into one book' if you want to combine several files into one.
- Click 'Process & Download' to let our engine rebuild your EPUB locally.
Common Use Cases
- Shrinking massive ebooks with high-res photos to fit more titles on your E-reader.
- Combining multiple chapters or volumes of a series into a single convenient file.
- Preparing digital books for cloud storage with reduced file size overhead.
Technical Details
Unpacks the EPUB (ZIP) container, processes images using browser-side compression, and re-packages the internal XML/HTML structure. All logic is executed on your device.
Frequently Asked Questions
- Will it break my formatting?
- Our reducer is designed to leave the text and CSS styling untouched, only optimizing the storage-heavy image assets.
- What is 'Grayscale Images'?
- This option converts all color images to black and white, which can significantly reduce file size and is often ideal for E-ink displays.
100% Private & Secure
This tool runs entirely in your browser using client-side technology. Your files and data are never sent to a server, ensuring 100% privacy and speed.