From PDF to Published EPUB

Every conversion moves through the same nine stages, in order: upload and preflight audit, font and image analysis, mode selection, conversion, visual comparison and drift validation, EPUB structural validation, accessibility validation, device preview, and retailer-ready export.

1. Upload and preflight audit

Your source PDF is audited for image formats, font embedding, transparency, CMYK colour space, page dimensions, and file size — before you spend a credit or subscription slot.

5. Visual comparison and drift validation

Every page of the converted output is compared against the corresponding source PDF page. A page that exceeds the maximum drift threshold is flagged before you can download, not shipped silently.

9. Retailer-ready export

Once validation passes, you can download your EPUB along with a Fidelity Certificate documenting drift score, page count, and font mode.

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