httptoolkit vs ProxyPin
HTTP traffic inspection and testing tools compared
httptoolkit and ProxyPin both capture HTTP(S) traffic for inspection and testing. httptoolkit emphasizes proxy-based debugging across several client types, while ProxyPin offers cross-platform capture and traffic editing features, including Flutter app support.

httptoolkit: Inspect and Debug HTTP Traffic
HTTP Toolkit is a cross-platform tool for inspecting, rewriting, and mocking HTTP(S) traffic. It helps developers debug clients and services by capturing requests and responses, testing custom requests, and simulating endpoints.

ProxyPin: Inspect and Rewrite HTTP(S) Traffic
ProxyPin is a cross-platform HTTP(S) traffic capture and inspection tool built with Flutter. It helps developers and testers examine, filter, rewrite, block, and replay application requests, including traffic from Flutter apps.
| httptoolkit | ProxyPin | |
|---|---|---|
| Language | — | Dart |
| License | — | Apache-2.0 |
| Stars | 3.6k | 14.1k |
| Forks | 116 | 1.2k |
| Last analyzed | Oct 3, 2026 | Oct 3, 2026 |
Key differences
- httptoolkit can intercept WebSocket and HTTP/2 traffic; ProxyPin's listed capture scope is HTTP(S).
- httptoolkit supports pausing live traffic and mocking endpoints with rules for failures, timeouts, and redirects; ProxyPin lists request mapping, rewriting, redirecting, and blocking.
- ProxyPin is built with Flutter and lists support for Windows, macOS, Android, iOS, and Linux; httptoolkit describes browser, Android, Electron, and backend or scripting interception.
- ProxyPin lists JavaScript processing, AES decryption keys, and HAR import and export; httptoolkit lists decoding, syntax highlighting, and editing and resending captured requests.
- ProxyPin specifies the Dart language and Apache-2.0 license; those details are not included for httptoolkit in the supplied information.
- httptoolkit's product spans separate UI, server, proxy, Android, and desktop repositories; ProxyPin's description presents its capture and inspection features together.
Choose httptoolkit if you…
- need to inspect WebSocket or HTTP/2 traffic through a transparent proxy.
- want to pause live exchanges or mock endpoints with configurable failures, delays, and redirects.
- debug traffic from browsers, Android devices, Electron apps, or backend and scripting environments.
Choose ProxyPin if you…
- want a tool built with Flutter that lists support for Windows, macOS, Android, iOS, and Linux.
- need to process traffic with JavaScript, configure AES decryption keys, or exchange history as HAR files.
- test Flutter app traffic or use domain filters, request blocking, and local response mapping.
Compare the numbers side by side, or add more projects
This comparison is generated with AI from the OSRepos analyses of both projects. Always check each project's repository and documentation before choosing.