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.
Easily transform your MOBI ebook files into clean HTML documents. This tool is perfect for developers and content creators who need to extract text and structure from proprietary Kindle formats into a web-ready format.
MOBI is a proprietary format primarily used by legacy Amazon Kindle devices for digital books, often featuring restricted DRM or specific tagging. HTML, conversely, is the foundational markup language of the web. During the conversion from MOBI to HTML, our processor translates the internal book structure into standard web tags, making the content accessible for browsers while maintaining the original textual hierarchy.
The conversion is lossless, ensuring that all text data and document structure remain intact during the transition from MOBI to HTML.
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
