Banner Check support
Get help with Banner Check by Viewst, local HTML5 validation and the ChatGPT integration.
Contact Viewst
Email hello@viewst.com for Banner Check support and privacy requests. Include Banner Check in the subject. We have no guaranteed response time.
For a useful bug report, include your browser and version, selected ad network, check category, expected behavior and steps to reproduce. Use a synthetic example and remove personal or confidential information from screenshots. Do not send customer creatives or credentials.
Checking a banner in ChatGPT
Open Banner Check, then select a ZIP or HTML file inside the widget or paste HTML there. Files attached to the conversation are not accessible to the Banner Check MCP server. The standalone widget cannot share results to ChatGPT.
Validation runs on your device without executing banner scripts. Explain in ChatGPT shares a compact summary only when you choose it. Changing the file or network invalidates the active shared context; it does not delete earlier chat messages.
Requirements and acceptance
Checks use our packaged ad-network rules. A passing report is a preflight result, not an approval guarantee. Verify the current vendor requirements before publishing. Banner Check does not upload advertisements to ad accounts.
Native WebMCP tools are available only in compatible browsers exposing document.modelContext. The website works without WebMCP; the remote ChatGPT MCP service is a separate integration.