Why one checker?
Belgium has separate LEZ systems. The 2026 Brussels threshold is stricter than the current Flemish threshold, so the same Euro 5 diesel can receive a different result by city. This tool compares the encoded rules but keeps a direct link to each official checker for exemptions and special categories.
Scope
The automatic comparison is intentionally limited to ordinary M1 passenger cars and N1 light vans. Electric/hydrogen vehicles are shown separately. Special-purpose vehicles, exemptions and later rule changes must be confirmed with the official city tool.
Open source
The comparison engine and its tests are MIT-licensed in belgian-utils / lez.js.
Is my data uploaded?
No. The vehicle comparison runs in your browser, so nothing you add is sent to gratistools.be. See the privacy page for details.
Frequently asked questions
Is this tool free?
Yes. The core tool is free to use in your browser.