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Head-to-head · Local Development Proxy Tools

HTTP Toolkit vs Fiddler Classic

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score HTTP Toolkit #3 in Local Development Proxy Tools 8.8/10 Free plan Free plan✓ 1 of 4 features Visit HTTP Toolkit
Fiddler Classic #5 in Local Development Proxy Tools 8.5/10 Free plan Free plan✓ 3 of 4 features Try Fiddler Classic

HTTP Toolkit leads on 0 checks, Fiddler Classic on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreHTTP Toolkit · 8.8/10
  • Free planboth
  • Most featuresFiddler Classic · 3 of 4

HTTP Toolkit scores higher on our rubric for local development proxy tools: 8.8 against 8.5 out of 10; our editors rank them #3 and #5.

HTTP Toolkit is the better fit for cross-platform teams needing free traffic interception. Fiddler Classic is the better fit for windows users debugging traffic for non-commercial use.

  • HTTP Toolkit fits best

    Cross-platform teams needing free traffic interception

  • Fiddler Classic fits best

    Windows users debugging traffic for non-commercial use

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Side by side

Feature HTTP Toolkit 8.8/10 Visit ↗ Fiddler Classic 8.5/10 Visit ↗
At a glance
Editor score 8.8 8.5
Ranking #3 in Local Development Proxy Tools #5 in Local Development Proxy Tools
Best for Cross-platform teams needing free traffic interception Windows users debugging traffic for non-commercial use
Pricing model Free plan + paid Free
Starting price — Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted, Desktop, Browser extension Desktop
Platforms Web, Windows, macOS, Linux, iOS, Android Windows
Support Email, Community, Docs Community, Docs
Built for Solo, Small business, Mid-market, Enterprise Solo
Features HTTP Toolkit 1/4 · Fiddler Classic 3/4
HTTPS interception Not checked yet ✓ (best)
Edit requests and responses ✓ ✓
Mobile app debugging Not checked yet Not checked yet
API debugging tools Not checked yet ✓ (best)
Specs
Supported platforms Not checked yet Windows
Our review
Pros
  • Inspect HTTP(S) and WebSocket traffic, with breakpoints and manual editing
  • Automate rewrites, mocks, redirects, and injected network errors
  • Works across desktop, browser, mobile, CLI, and development tools
  • Logs and inspects HTTP(S) traffic from browsers and desktop apps
  • API Composer lets developers compose HTTP/S requests
  • AutoResponder can mock responses and modify traffic
Cons
  • Automated mocking and rewriting require the Professional plan
  • Team workspaces are listed as coming soon
  • Advanced proxy configuration is a Professional-plan feature
  • Windows-only desktop availability limits platform fit
  • Free use is limited to personal and other permitted non-commercial use
  • Maintenance mode means it is not in active development
Our verdict

HTTP Toolkit is an open-source HTTP and HTTPS debugging proxy for developers and testers who need to inspect or change traffic from applications, browsers, mobile apps, containers, command-line tools, and backend languages. Its desktop…

Read the review →

Fiddler Classic is a Windows desktop proxy for developers who need to inspect and debug HTTP(S) traffic from browsers and desktop apps. It logs network traffic and provides tools to compose requests, mock responses, and modify traffic. Its…

Read the review →
  1. HTTP ToolkitLocal Development Proxy Tools 8.8Free plan
  2. Fiddler ClassicLocal Development Proxy Tools 8.5Free plan

Strengths and trade-offs

  • HTTP Toolkit — where it wins

    • Inspect HTTP(S) and WebSocket traffic, with breakpoints and manual editing
    • Automate rewrites, mocks, redirects, and injected network errors
    • Works across desktop, browser, mobile, CLI, and development tools

    Where it doesn't

    • Automated mocking and rewriting require the Professional plan
    • Team workspaces are listed as coming soon
    • Advanced proxy configuration is a Professional-plan feature

  • Fiddler Classic — where it wins

    • Logs and inspects HTTP(S) traffic from browsers and desktop apps
    • API Composer lets developers compose HTTP/S requests
    • AutoResponder can mock responses and modify traffic

    Where it doesn't

    • Windows-only desktop availability limits platform fit
    • Free use is limited to personal and other permitted non-commercial use
    • Maintenance mode means it is not in active development

More comparisons

All local development proxy tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update