whistle
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Description:
HTTP, HTTP2, HTTPS, Websocket debugging proxy
Type: Formula  |  Latest Version: 2.9.106@0  |  Tracked Since: Dec 21, 2025
Links: Homepage  |  GitHub  |  Docs  |  formulae.brew.sh
Stars: 15,288  |  Forks: 1,146  |  Language: JavaScript  |  Category: Developer tools
Tags: proxy debugging web-development http network
Install: brew install whistle
About:
Whistle is a cross-platform web debugging proxy that allows developers to intercept, inspect, and modify HTTP, HTTPS, HTTP2, and WebSocket traffic. It provides a powerful rule-based system for rewriting requests, mocking data, and diagnosing network issues, making it an essential tool for front-end and API development.
Key Features:
  • Intercepts and inspects HTTP/HTTPS/HTTP2/WebSocket traffic
  • Rule-based system for rewriting requests and mocking responses
  • Web-based UI for real-time traffic monitoring and configuration
  • Supports hosts management and PAC (Proxy Auto-Configuration) scripts
  • Plugin ecosystem for extending functionality
Use Cases:
  • Debugging and testing web applications and APIs
  • Mocking backend API responses for frontend development
  • Analyzing and modifying network traffic for security testing
Alternatives:
  • mitmproxy – Open-source, Python-based, more focused on security analysis and scripting
  • Charles Proxy – Commercial, GUI-focused proxy with similar debugging features
Version History
Detected Version Rev Change Commit
Dec 24, 2025 9:55pm 2.9.106 0 VERSION_BUMP 77e36023
Dec 21, 2025 5:22pm 2.9.105 0 VERSION_BUMP 4af3fbb7
Oct 8, 2025 6:39pm 0 VERSION_BUMP 81ba2bb5
Oct 8, 2025 5:46pm 0 VERSION_BUMP c044c97e
Sep 14, 2025 6:07pm 0 VERSION_BUMP 8c883475
Sep 14, 2025 5:40pm 0 VERSION_BUMP 8d552dc5
Jan 13, 2025 2:21pm 0 VERSION_BUMP 34d987be
Dec 23, 2024 2:10pm 0 VERSION_BUMP 555af0f4
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Oct 11, 2024 8:37pm 0 VERSION_BUMP 1d525865
Oct 11, 2024 7:12pm 0 VERSION_BUMP 989695b0
Sep 4, 2024 12:57pm 0 VERSION_BUMP 5b4ff3f7
Aug 9, 2024 12:58pm 0 VERSION_BUMP e5722ca8
Jul 13, 2024 3:49pm 0 VERSION_BUMP 7e2f953c
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Dec 8, 2023 2:42pm 0 VERSION_BUMP c2adccd9
Aug 16, 2023 7:41pm 0 VERSION_BUMP 67fe05e8
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May 14, 2023 7:17pm 0 VERSION_BUMP ade54f7a
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Mar 19, 2023 10:06pm 0 VERSION_BUMP 1e691dfe
Mar 19, 2023 10:06pm 0 VERSION_BUMP 2dd6f19a