Top 12 Open-Source Alternatives to Fiddler

Product categories

API Tools APIs Debugging Developer Tools Log Management Monitoring Tools Performance Monitoring Productivity Proxy Security Software Development Testing

Summary

The top open-source alternatives to Fiddler are Wireshark, Postman, and Proxyman.io. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Wireshark Landing Page
1

Wireshark

Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
Pricing:
- Open Source
#Monitoring Tools #Log Management #Performance Monitoring 11 social mentions
Postman Landing Page
2

Postman

The Collaboration Platform for API Development
Pricing:
- Open Source
#APIs #API Tools #Developer Tools 27 social mentions
Proxyman.io Landing Page
3

Proxyman.io

Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Pricing:
- Open Source
- $49.0 / Annually
#Developer Tools #Debugging #Proxy 24 social mentions
HTTP Toolkit Landing Page
4

HTTP Toolkit

Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.
Pricing:
- Open Source
- Freemium
- €7.0 / Monthly (for a Pro subscription)
#Software Development #Development Tools #Security 24 social mentions
mitmproxy Landing Page
5

mitmproxy

mitmproxy is an SSL-capable man-in-the-middle proxy for HTTP.
Pricing:
- Open Source
#Developer Tools #Security #Software Development 81 social mentions
Insomnia REST Landing Page
6

Insomnia REST

The most intuitive cross-platform REST API Client ð´
Pricing:
- Open Source
#API Tools #API #Developer Tools 120 social mentions
tcpdump Landing Page
7

tcpdump

tcpdump is a common packet analyzer that runs under the command line.
Pricing:
- Open Source
#Monitoring Tools #Log Management #Security
Hoppscotch Landing Page
8

Hoppscotch

Open source API development ecosystem
Pricing:
- Open Source
- Freemium
- Free Trial
#Web App #Productivity #APIs 77 social mentions
Zed Attack Proxy Landing Page
9

Zed Attack Proxy

The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding...
Pricing:
- Open Source
#Web Application Security #Security #Security & Privacy
Requestly Landing Page
10

Requestly

Debug & Modify network requests - loved by 100K+ web devs
Pricing:
- Open Source
- Freemium
- Free Trial
#Testing #Localhost Tools #Developer Tools 24 social mentions
Raygun Landing Page
11

Raygun

Raygun gives developers meaningful insights into problems affecting their applications. Discover issues - Understand the problem - Fix things faster.
Pricing:
- Open Source
#Error Tracking #Exception Monitoring #Monitoring Tools 5 social mentions
cURL Landing Page
12

cURL

cURL is a computer software project providing a library and command-line tool for transferring data...
Pricing:
- Open Source
#API Tools #APIs #Developer Tools 105 social mentions