PDF to EPUB API

Turn a PDF into an EPUB whose text reflows to fit any screen, instead of a fixed page you have to zoom around.

How it converts

calibre converts PDF to EPUB.

A PDF stores positioned text, not paragraphs, so calibre rebuilds paragraphs from it. Single-column text converts well; multi-column layouts, tables and forms lose their arrangement.
Scanned PDFs are images of text and convert to almost nothing. OCR is not supported yet.

Will the ebook keep the PDF’s layout?: No, and that is the point of EPUB: the text reflows. A PDF stores positioned text, not paragraphs, so calibre rebuilds paragraphs from it. Single-column text converts well; multi-column layouts, tables and forms lose their arrangement.
Can it convert a scanned PDF?: Scanned PDFs are images of text and convert to almost nothing. OCR is not supported yet.

Price: 5 free conversions every month. Pro is $9 a month for 1,500, Scale $39 for 10,000. PDF to EPUB costs the same as any other pair.
Largest file: 25 MB on Free, 100 MB on Pro, 250 MB on Scale.
Failed conversions: Never billed, and they don’t count toward your plan.
Your files: Deleted within 24 hours, along with the converted result.
How to call it: The REST API, described by an OpenAPI spec, or the MCP server from Claude or any other MCP client. Both use the same API key and quota.