Workflow-specific products Content, decks, briefs, proposals, legal, and sales each have a clearer buying path.

Review before delivery Draft, edit, collaborate, approve, and export in the same workspace.

Security + procurement path Security policy, support, and Azure Marketplace buying are public.

Microsoft AI Partner Azure Marketplace G2

Gixo Folio · free tool

EPUB Preflight Checker

Check EPUB structure, reading order, metadata, XML safety, offline resources and ZIP expansion limits.

No accountNo AI callNothing storedRate limited

Input

EPUB file Maximum compressed size: 5 MB.

Details

See the accepted inputs, generated output, and important limits.

Topic	Details	What to know
Input	An EPUB file	The chosen tool accepts only the fields or file type shown above.
Processing	Deterministic construction; no AI model call	The result is calculated or assembled from the supplied values.
Free output	A complete structural preflight report.	This is the complete attributed output available without an account.
Product continuation	Use a focused editorial pass under eligible Folio access to inspect advisory manuscript findings. Findings are advisory and require author decisions.	The product argument follows the completed free result and describes the authored workflow that continues this job.

Do I need an account to use EPUB Preflight Checker?

No. The public tool runs without an account.

Does this builder call an AI model?

No. It uses deterministic parsing, calculation, and rendering.

Is my input stored?

No. The public tool does not save the submitted input.

What does the paid product add?

Use a focused editorial pass under eligible Folio access to inspect advisory manuscript findings. Findings are advisory and require author decisions.

Updated 24 October 2026