Compress EPUB Online

Reduce the size of your EPUB file without visibly degrading the quality

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Compress EPUB documents using the application we have developed for you. The EPUB compression application has three modes of operation: "Low", "Medium" and "High". The "Low" compression mode optimizes the internal structure of the document and removes redundant metadata from the EPUB document. The "Medium" mode performs the same actions as the "Low" compression mode and additionally reduces the quality of images within the document by 50%. In the "High" compression mode, images are compressed by 75% and the maximum resolution for images will be 150px.

Why do I need to compress EPUB documents? For example, you regularly receive invoices from your partners for payment of services in the form of EPUB documents. You need to put these documents in an archive, but each document contains a logo or a graphic diagram that takes up a lot of space on your hard drives. The EPUB document compression application will help make your documents more compact and save extra space in your repositories.
You can compress EPUB documents on any operating system: Windows, macOS, Linux or Android. Just open the page of this application in a web browser, load your document, select a compression mode and click the "Compress" button. In a minute, you will receive a link to download the compressed document.

Optimize EPUB
Choose the degree of compression
Remove unused objects from EPUB
Allow reuse of page content
If you select a high compression ratio, the quality of the pictures will be reduced by 75%

How to Compress EPUB file

Open the free Compress EPUB app in your browser.
Click inside the file drop area to upload your EPUB file or drag and drop it.
Choose the compression mode: Low, Medium or High.
Click the 'COMPRESS' button. A download link for the compressed EPUB file will be shown.
You can also send a link to the EPUB file to your email address.
Note that the files will be deleted from our servers after 24 hours and the download links will stop working.

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