Performance Snapshot is a free Chrome extension designed for developers, agencies, and site owners to analyze web page performance. It captures essential metrics such as navigation timing, resource timing, transfer sizes, and third-party domains for the active tab. This tool provides a quick local timing report that highlights key performance indicators like DOM readiness, load events, and the time to first byte (TTFB). Users can easily copy a plain-text summary or export their findings in JSON or CSV formats for further analysis or sharing.

While Performance Snapshot does not serve as a replacement for tools like Lighthouse or PageSpeed Insights, it offers valuable insights into local browser performance metrics visible at the time of capture. Features such as a current-page snapshot and export options enhance usability. Future updates promise to include saved local history, comparison capabilities, and client reporting options, making it a versatile addition to any developer’s toolkit.