Inline XBRL

iXBRL Validation for ESEF, SEC & More

Validate Inline XBRL documents with comprehensive checks for tagging, transformations, and report package structure.

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What is iXBRL?

Inline XBRL (iXBRL) embeds XBRL tags directly within an HTML or XHTML document. This allows the same document to be both human-readable (as a formatted report) and machine-readable (as structured data).

iXBRL is the required format for ESEF (European Single Electronic Format), SEC filings, and many other regulatory mandates worldwide.

Key Benefits of iXBRL

  • Single document serves both humans and machines
  • Tags are invisible to readers but extractable by software
  • Reduces errors from maintaining separate documents

iXBRL Validation Features

Comprehensive checks for Inline XBRL compliance

Integrated Viewer

View the rendered document with tagged facts highlighted on hover.

Transformation Rules

Validate that iXBRL transformation rules are correctly applied.

Report Package

Validate ESEF report package structure including META-INF.

Extension Taxonomy

Check that extension elements are properly defined and anchored.

Supported Mandates

iXBRL validation for major regulatory frameworks

ESEF (EU)

European annual financial reports under ESMA regulation

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SEC iXBRL (US)

SEC Edgar inline XBRL filing requirements for US companies

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UK FRC

UK Financial Reporting Council iXBRL tagging rules

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Companies House

UK Companies House accounts filing in iXBRL format

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Common iXBRL Errors

Issues our validator catches

ixbrl.3.1.1

Target document not found in report package

ixbrl.4.1.1

Invalid or missing transformation rule

ixbrl.2.1.1

Document does not conform to iXBRL specification

esef.2.5.1

Extension element missing required anchoring

View all iXBRL errors →

Frequently Asked Questions

What's the difference between XBRL and iXBRL?

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XBRL is pure XML data. iXBRL embeds XBRL tags within HTML/XHTML, creating a dual-purpose document that's both human and machine readable.

Do you support ESEF report packages?

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Yes, we validate complete ESEF report packages including the ZIP structure, META-INF manifest, and all contained documents.

How do you validate transformation rules?

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We check that each tagged value uses an appropriate transformation rule for its datatype and format, per the iXBRL Transformation Registry.

Can you validate custom CSS styling?

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We validate that CSS doesn't interfere with iXBRL rendering. Visual fidelity checks ensure the styled output matches expectations.

Do you support the iXBRL Viewer specification?

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Yes, our viewer follows the XBRL International iXBRL Viewer specification for consistent fact highlighting and navigation.

What versions of iXBRL do you support?

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We support iXBRL 1.0, 1.1, and the draft 2.0 specification. All major transformation registries are included.

Validate Your iXBRL Documents Today

Ensure your Inline XBRL reports are compliant before filing

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