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Your time travel debugger

About Replay

Replay is a time travel debugger that records and replays web applications using familiar browser dev tools. Trusted by engineering teams, Replay’s Nut API captures and analyzes app behavior to identify root causes of bugs, making bug-fixing more efficient and reliable.

Replay screenshot

Key Features

Key capabilities enabling rapid debugging and root-cause analysis include:

Deterministic Recorder

Chromium-based browser recorder captures exact, replayable app behavior for reliable analysis.

Time-Travel Debugger with DevTools

Replay sessions and state changes can be stepped through in browser dev tools to locate root causes.

Nut API Analytics

Analyzes recordings to surface causal relationships and actionable debugging insights.

Nut.new No-Code Builder

No-code tool to build apps from AI prompts and access Nut API for guidance.

Summary

For software engineers and QA teams, the primary value lies in reproducible, end-to-end recordings of web app runs that can be replayed with familiar dev tools to identify the root cause of bugs. The combination of a deterministic browser recorder, integrated analytics via the Nut API, and a no-code app-building path supports both deep investigation and rapid iteration within the debugging workflow.

Free

$0 / month

  • One project
  • Limited customer support
  • API connectors
  • Download your code
  • Deploy your applications

Builder

$20 / month

  • Unlimited projects
  • Priority Customer Support
  • API connectors
  • Download your code
  • Deploy your applications

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