IAB TCF Validator

Tool to validate IAB TCF strings for correctness and compliance, aiding publishers, advertisers, and developers in verifying consent data before integration.

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About This Tool

The IAB TCF Validator analyzes the provided consent string to verify its structure, version, and field values against IAB standards. It supports both TCF v1 and v2 strings, decoding purposes, vendors, and features and reporting any inconsistencies.
Conceptually the tool does not modify the input; it uses a decoupled data model to interpret fields, consults a GVL data set to validate vendor eligibility, and flags problematic entries with actionable guidance.
Who benefits: publishers, ad tech teams, developers; use cases include QA checks before deployment, debugging consent flows, and ensuring CMP integrations meet policy expectations.
Unique value: independent validation with configurable GVL data, structured machine readable outputs, and export options for CI/CD pipelines.
Core features include TCString decoding, version compatibility checks, purpose and vendor validation, error reporting with codes, and guidance for fixes.

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How to Use

Provide inputs: paste the TCString and, if available, GVL data or a reference URL.
Run validation: choose auto detect version or specify v1/v
Review outputs: validity status, error codes, and field level results.
Apply fixes: adjust vendor or purpose entries as needed and revalidate.
Export: save the validation report for audits or CI workflows.

Frequently Asked Questions

Find Quick Answers

What is IAB TCF?

IAB TCF defines a standardized framework for obtaining and communicating user consent in online advertising. It specifies the TCString structure, purposes, vendors, and special features to support compliant data sharing and ad targeting.

What inputs are required?

At minimum, a TCString is required. Optional inputs include a GVL data set, region code, and language to contextualize validation and enhance vendor and purpose checks.

What do outputs indicate?

Outputs show a validity flag, a list of detected errors and warnings, and field level results such as suspected invalid vendors, purposes, or missing consent flags. They guide fixes to achieve compliance.

How to handle missing GVL data?

If GVL data is unavailable, the validator can perform structural checks and version validation, returning a best effort report with guidance to obtain the official GVL for full validation.

Is this tool official?

This validator implements IAB TCF data models and common validation logic but is a third party tool. It should be used as a development and QA aid and not as a sole source of compliance determination.

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