Any file up to 500 MB. Drop several files and they come back as one ZIP. Many image, audio and video conversions run in your browser; anything else is uploaded and removed within the hour.
Transform your OpenDocument Text (ODT) files into EPUB format seamlessly. This conversion is ideal for authors and students looking to turn their drafts into e-book reader-ready files.
ODT is an XML-based word processing format commonly used in OpenOffice or LibreOffice, primarily designed for document creation and editing. In contrast, EPUB is the industry-standard reflowable format for digital books. Converting ODT to EPUB involves mapping the ODT structural tags—like headings, paragraphs, and lists—into the OPS (Open Packaging Structure) format required by EPUB readers. This process ensures that your document text flows correctly on screens of different sizes, such as e-readers, tablets, and smartphones.
The conversion is lossless, meaning your content, formatting, and document structure remain entirely intact. The file size typically undergoes only a minor, negligible change during the repackaging process.
We built this project so anyone can convert files without paywalls, accounts, or hidden limits. Here is what that promise means in practice.
Every converter on ConvertX is free to use: no trials, no premium tiers, and no credit packs. We will never put core conversion features behind a subscription. Whether you convert one photo or a hundred files a week, the price stays zero.
Many image, audio, and video conversions run entirely in your browser. Your files never leave your device for those jobs. When server processing is required for documents or specialized formats, uploads are handled securely and removed automatically — typically within one hour.
A quick guide to strengths and trade-offs of popular formats — so you pick the right one before converting.
Office files, PDFs, ebooks, and plain text.
Common extensions: PDF, DOCX, XLSX, PPTX, ODT, EPUB, TXT
Raster and vector graphics for web, print, and photography.
Common extensions: PNG, JPG, WebP, AVIF, GIF, SVG, HEIC, TIFF
Clips, streams, screen recordings, and movies.
Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG
Music, podcasts, voice recordings, and sound effects.
Common extensions: MP3, WAV, FLAC, OGG, AAC, M4A, OPUS
