Convert your files to any format
TXT files contain plain text and do not have any specialized text formatting, such as bold or italics. They are simple and common, used to store raw data, source code, notes and others types of information that do not require formatting.
More informationOPF files are metadata files in XML format that describe the structure and content of an e-book in the Open Electronic Publishing (EPUB) standard. ). OPF files contain information about the files that make up the e-book, such as text, images, and formatting styles.
More informationSelect files from your computer. You can also just drag it to this page.
Choose OPF or any other desired output format (200+ formats supported)
When your file is converted, you can save file OPF immediately