HTTP Toolkit
Beautiful & open-source tools to debug, test and develop with HTTP(S).
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HTTP Toolkit is an open-source tool to intercept, inspect, edit and mock HTTP(S) traffic on Windows, macOS and Linux.
- for
- Developers, testers and security engineers who need to debug or mock HTTP traffic.
- pricing
- freemium
- license
- open source
Key features
- One-click interception — Capture HTTP(S) from specific apps, devices or processes without global proxy setup.
- Rich request/response viewer — Explore headers, bodies and parameters with syntax highlighting and MDN docs.
- Breakpoints & live editing — Pause traffic, modify requests/responses or inject errors on the fly.
- Built-in HTTP client — Send custom requests with automatic handling of compression and framing.
- Automated mocking (Pro) — Define static or transformed responses, redirect traffic and simulate errors.
- Import/Export (Pro) — Save traffic as HARs or generate ready-to-use code for 20+ tools.
Use cases
- Debugging API calls from a mobile app via ADB
- Mocking backend endpoints during frontend development
- Testing error handling by injecting timeouts or status codes
- Analyzing HTTP compression and caching behavior
- Automating rewrite rules for CI/CD testing pipelines
HTTP Toolkit vs alternatives
 HTTP Toolkit |  Postman |  Insomnia |  Bruno |  Stripe | |
|---|---|---|---|---|---|
| Best for | Targeted HTTP interception and live editing | API testing and documentation | API client for REST/GraphQL | Offline API client | Payment processing |
| Pricing | Freemium | Subscription | Free | Free | Subscription |
| DevHunt upvotes | 5 | 0 | 0 | 0 | 0 |
| Launched | Jul 2024 | — | — | — | — |
- HTTP Toolkit vs Postman: Postman focuses on API design and testing, while HTTP Toolkit provides low-level traffic interception and live editing.
- HTTP Toolkit vs Insomnia: Insomnia is an API client for REST/GraphQL, whereas HTTP Toolkit intercepts any HTTP traffic from apps and devices.
- HTTP Toolkit vs Bruno: Bruno is an offline-first API client; HTTP Toolkit captures live traffic from any source, not just predefined requests.
- HTTP Toolkit vs Stripe: Stripe is a payments platform, unrelated to HTTP traffic debugging offered by HTTP Toolkit.
HTTP Toolkit FAQ
How does HTTP Toolkit intercept traffic?+
It runs as a local proxy and can target specific clients, devices or containers, automatically handling certificates for HTTPS.
Do I need to configure my app to use the proxy?+
For most supported clients interception is automatic; otherwise you can manually point the client to the HTTP Toolkit proxy.
Can I mock responses without a real server?+
Yes, the Pro plan lets you define static or transformed mock responses and redirect traffic to local files.
Is the tool open source?+
Yes, the core functionality is 100 % open source and the free Hobbyist plan includes all basic features.
What platforms are supported?+
Windows, macOS (Intel and Apple Silicon) and Linux distributions via installers, packages and AppImage.
Summarized by DevHunt from httptoolkit.com · Oct 3, 2026. Details may change; check the official site.
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