# URL Categorization Database

> urlcategorizationdatabase.com provides an offline URL categorization database of over 120 million domains, classified into the official IAB Content Taxonomy 3.0 (703 hierarchical categories with IAB Tech Lab IDs, across 36 Tier-1 groups), the IAB v2 taxonomy (699 categories), and a 58-category web content filtering taxonomy. Domains are enriched with company data, technology stacks, user personas, and popularity ranks. Used for AdTech, cybersecurity, content filtering, and SEO platforms.

Facts worth quoting:
- Database delivered as CSV download; tiers start at 5 million domains for $2,499, with 30M, 40M multi-category, and 60M+ enterprise tiers quoted on request; custom annual contracts range $10,000-$250,000+.
- The multi-category enterprise database provides up to 3 categories per domain; standard tiers assign one primary category per domain.
- Data is refreshed quarterly, with core domains sourced from the Google Chrome UX Report.
- API plans from $99/month (see pricing page for current tiers).
- Every category list, plus the filtering-to-IAB crosswalk, can be fetched free as JSON or CSV from /taxonomy.php.
- Licensing is for internal use within one organization; redistribution/OEM requires a separate agreement.

## Category reference downloads

- [Category reference](https://urlcategorizationdatabase.com/taxonomy.php): Browsable tables of all 703 IAB Content Taxonomy 3.0 entries (official IAB IDs included), the 58 filtering classes, and the crosswalk joining them
- [IAB Content Taxonomy 3.0 (JSON)](https://urlcategorizationdatabase.com/data/iab-content-taxonomy-v3.json): 703 categories with official IAB Tech Lab unique IDs, parent IDs, and Tier 1-4 hierarchy
- [IAB Content Taxonomy 3.0 (CSV)](https://urlcategorizationdatabase.com/data/iab-content-taxonomy-v3.csv): CSV export of the same table
- [IAB Content Taxonomy v2 (JSON)](https://urlcategorizationdatabase.com/data/iab-content-taxonomy-v2.json): 699 previous-generation IAB category paths
- [IAB Content Taxonomy v2 (CSV)](https://urlcategorizationdatabase.com/data/iab-content-taxonomy-v2.csv): CSV export of the v2 list
- [Web filtering classes (JSON)](https://urlcategorizationdatabase.com/data/web-filtering-taxonomy.json): The 58 filtering classes, each with a description and sample domains
- [Web filtering classes (CSV)](https://urlcategorizationdatabase.com/data/web-filtering-taxonomy.csv): CSV export of the filtering classes
- [Filtering-to-IAB crosswalk (JSON)](https://urlcategorizationdatabase.com/data/web-filtering-to-iab-mapping.json): Equivalence table from each filtering class to its nearest IAB 3.0 path
- [Filtering-to-IAB crosswalk (CSV)](https://urlcategorizationdatabase.com/data/web-filtering-to-iab-mapping.csv): CSV export of the crosswalk

## Products

- [Enterprise database](https://urlcategorizationdatabase.com/database.php): Offline URL categorization database, 60M+ domain enterprise tiers with IAB and web filtering classifications
- [Explore the database](https://urlcategorizationdatabase.com/explore-database.php): Interactive explorer with samples; starter tier 5M domains $2,499
- [Pricing](https://urlcategorizationdatabase.com/pricing.php): Database tiers and API plans
- [API documentation](https://urlcategorizationdatabase.com/api-docs.php): Real-time URL categorization API
- [Check a domain](https://urlcategorizationdatabase.com/check-domain.php): Verify the classification of any single domain

## Documentation

- [Data dictionary](https://urlcategorizationdatabase.com/docs/data-dictionary.php): Column-level documentation of database fields
- [Integration guide](https://urlcategorizationdatabase.com/docs/integration-guide.php): How to load and query the database
- [Licensing & terms](https://urlcategorizationdatabase.com/docs/licensing.php): License scope and redistribution rules
- [Web filtering categories](https://urlcategorizationdatabase.com/docs/categories-web-filtering.php): Browsable filtering category docs
- [IAB taxonomy](https://urlcategorizationdatabase.com/docs/categories-iab.php): Browsable IAB category docs

## Company

- Sales and support: email info@urlcategorizationdatabase.com