FB2 Validator

FB2 Validator analyzes FictionBook 2.0 files to ensure XML well-formedness, schema conformance, and metadata completeness for authors, publishers, and ebook workflows.

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About This Tool

The FB2 Validator examines FB2 files for conformance to XML syntax and the FictionBook 2.0 specification. It flags missing required blocks such as description, title-info, and author, and it detects structural anomalies that could impede ingestion by catalogs or distribution systems.

Conceptually, the tool parses the FB2 document, validates against the 2.0 XSD, and applies domain checks for metadata completeness (title, author, language, genre) and proper tagging of sections. It reports findings with severity levels and precise element paths, including line/column information when available.

Audience and differentiators: publishers, libraries, distributors, and authors benefit from machine-readable diagnostics and optional repair guidance. The validator is designed for automation-into-CMS workflows and batch pipelines, offering JSON/XML reports and easy integration with content-ops. Core features include well-formedness checks, schema conformance, required-block verification, metadata validation, and report export. Typical scenarios are pre-submission validation, batch catalog ingestion, QC during conversion, and audit logs to support compliance.

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How to Use

Provide inputs by uploading an FB2 file or pasting FB2 XML into the input field.
The tool parses and validates against the FictionBook
0 schema, reporting syntax and schema issues.
Review the diagnostic report for errors, warnings, and metadata gaps with element paths and line numbers.
Export the report as JSON or XML for integration with your workflow and archive the results.
Fix identified issues in the source FB2 and re-run validation to confirm resolution.

Frequently Asked Questions

Find Quick Answers

What does the validator check?

It checks XML well-formedness, FB2 2.0 schema conformance, required blocks (description, title-info, author, language), and metadata quality. The output is a severity-labeled list of findings with element paths and locations when available.

What inputs are accepted?

The tool accepts FB2 files or raw FB2 XML. Other formats are not processed unless configured for a specific workflow integration.

How are errors reported?

Errors are reported with severity, an element path, and line/column numbers when available. The report can be exported as JSON or XML for automated processing.

Can it repair automatically?

The validator provides repair guidance and recommended edits but does not modify the source automatically. Automation can be configured in pipelines to apply fixes programmatically.

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