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FB Pixel Tester

A browser-based tool for testing, debugging, and validating Facebook Pixel and Conversions API (CAPI) event implementations.

FB Pixel Tester screenshot

//About

FB Pixel Tester is a developer utility that helps troubleshoot and validate Meta Pixel and Conversions API (CAPI) implementations. It captures browser-side pixel events, checks event payloads, validates required parameters, and simulates CAPI server-side calls — all from a clean dashboard interface.

  • Live pixel event capture: Injects a proxy that intercepts outgoing Pixel events and displays them in real-time with full payload inspection.
  • CAPI simulation: Sends test events directly to Meta's Conversions API endpoint to validate server-side setups without running production traffic.
  • Event validation: Checks each event against Meta's required and recommended parameters schema, flagging missing or malformed fields.
  • Multi-event sequencing: Replays a sequence of standard events (ViewContent, AddToCart, Purchase, etc.) to verify funnel integrity and deduplication settings.

//Technology

JavaScriptTypeScriptReactMeta Conversions APIMeta Pixel SDKChrome DevTools Protocol