
Surge for Mac
Weer
Charles Proxy
James
HTTP Toolkit
mitmproxy
HTTP Analyzer
Debug HTTP API calls to a back-end and between back-ends. Easy of use, clean UI, and short ramp-up time. Not a proxy, no network issues!

Requestly
modheader
Header Editor
RequestHeaders.com
VibeHeader
HTTP Header Live
Modify Header Value (HTTP Headers)
A local-first ModHeader alternative: rewrite HTTP request & response headers via Chrome's native declarativeNetRequest. No backend, no account, no telemetry.
Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | httpdebugger.com | headerflex.app |
| Listed in |
In their own words, as submitted to SaaSHub.


HTTP Debugger is a professional HTTP sniffer and analyzer for developers. You can use HTTP Debugger to debug HTTP API calls to a back-end and between back-ends. HTTP Debugger is very easy of use, with clean UI, and short ramp-up time. It's not a proxy, and does not produce network issues!
No description of HeaderFlex.app yet.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of HeaderFlex.app yet.
Walkthroughs and reviews on video.
CrackingShow[4]|HTTP Debugger v8.16 Pro | How to Getting Login data
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using HTTP Debugger and HeaderFlex.app. For example, how are they different and which one is better?
When comparing HTTP Debugger and HeaderFlex.app, you can also consider the following products.

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A Powerful API Mocking and Testing Tool
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A HTTP protocol debugger with Chrome DevTools frontend interface
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Free browser extension to modify HTTP request and response headers. No sign-up. Works on Chrome, Firefox, and Edge.
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HTTP proxy / HTTP monitor / Reverse Proxy
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Add custom HTTP request headers to any site. Set Authorization tokens, override Content-Type, inject debug headers per URL pattern. declarativeNetRequest. Free: 5 rules, Pro: unlimited.
Compare Header Editor to HTTP Debugger or HeaderFlex.app: