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.
Convert your HTML code into a professional EPUB document for seamless reading on e-readers. This tool is perfect for web developers and writers who want to turn web pages into portable digital books.
HTML is a markup language designed for web content, utilizing tags to structure text and media for browser rendering. EPUB is a standardized ebook file format specifically structured for reflowable content on digital reading devices. When you convert HTML to EPUB, our tool maps your web tags into the containerized structure required by e-readers, ensuring that chapters, headings, and paragraphs are correctly interpreted as a document.
The conversion is lossless, meaning all your original text, formatting, and structural integrity remain perfectly intact. The final file size remains nearly identical to the source HTML, as it simply repackages the data into an EPUB container.
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
