Office Document Privacy Checker & Repair Tool
Document Local only
EPUB Editor & Validator
Local EPUB 3 reviewValidate EPUB structure, reading order, navigation, resources, accessibility, metadata, and export a normalized book.
Audit and refine an EPUB
Inspect package metadata, manifest, spine, navigation, resources, links and accessibility evidence in one local workspace.
Private, bounded publication analysis
Book bytes stay in this tab. Active content and remote loads are removed from the sandboxed preview.
How to use it
- 01
Open an EPUB locally
Load a bounded publication and verify its required mimetype, container and package document.
- 02
Audit reading experience
Review spine order, navigation, links, resource declarations, scripts, remote references and accessibility metadata.
- 03
Edit and validate
Update common metadata, preview sanitized content, export a normalized EPUB, and reproduce definitive checks with EPUBCheck.
Frequently asked questions
Is this the same as EPUBCheck?
No. The browser editor performs useful structural, navigation, resource and accessibility checks, then generates an EPUBCheck command for authoritative conformance validation.
Can it open DRM-protected books?
Encrypted or DRM-protected publication resources are reported but deliberately not decrypted or previewed.
Can previewed chapters contact remote servers?
No. Preview markup is sanitized, active elements and external resource attributes are removed, and the iframe has an empty sandbox.
Will metadata edits change book content?
Edits target the OPF metadata document and rebuild the ZIP with the required uncompressed mimetype first. Always validate and test the exported copy in real reading systems.
Related tools
Keep working with other focused browser utilities.