Fiddler Alternatives for HTTPS Debugging on Any OS

Fiddler is Progress Telerik's web debugging proxy, and today it comes in two very different forms. Fiddler Classic, the Windows app most people remember, is still a free download, but the Fiddler Classic page now labels it non-commercial use only and in maintenance mode, with no commitments for releases, patches or support. Fiddler Everywhere is the supported product for Windows, macOS and Linux, and it is a per-user subscription.

That split is why people search for alternatives. If you debug HTTP traffic at work, Classic's licence no longer covers you, and Everywhere means a monthly bill and a login. The six tools below do the same core job: sit between a client and the network, decrypt HTTPS with a trusted certificate, and let you inspect, change and replay requests. The first four are debugging proxies, followed by a security proxy and a packet analyzer for when a proxy is not enough.

Prices below are as of November 6, 2026. Our method is on How we review tools.

Quick comparison

HTTP Toolkit

The biggest time saver in HTTP Toolkit is setup. Instead of pointing each client at a proxy and installing a certificate by hand, you pick a target and it does both: a fresh browser window, a terminal whose Node.js, Python, Java or Ruby processes are intercepted, a Docker container, or an Android device over ADB. iOS apps are supported as well. It is open source and runs on Windows, macOS and Linux.

The free Hobbyist tier covers inspection and manual breakpoints. Pro adds mocking, rewrite rules, HAR export and TLS passthrough. HTTP Toolkit Pro costs $15 a month or $132 a year; Team is $24 per user a month or $216 a year.

Best for: Developers who debug mobile apps, containers or backend scripts, not only browsers.

Pricing:

• Hobbyist: free
• Pro: $15 a month, or $132 billed yearly
• Team: $24 a month, or $216 billed yearly; team workspaces via sales

Watch out for:

• Rewrite rules, mocking and HAR export, things Fiddler Classic users get for free, are Pro features, per the HTTP Toolkit pricing page.
• There is no scripting engine like FiddlerScript. Custom logic means writing rules in the interface or moving to mitmproxy.

Official site: HTTP Toolkit.

Charles Proxy

Charles is the long-standing paid rival to Fiddler, and it is popular with Mac and mobile developers. It records traffic in a sequence or structure view, decrypts SSL using a root certificate it generates, and offers breakpoints, rewrite rules, map local and map remote, bandwidth throttling and repeat requests. Version 5.2.2 is current.

Its licence is the main draw for anyone avoiding subscriptions. The Charles store sells a licence for $50 per user for one to four users, with volume prices down to $30 each, and it covers the current major version and all its updates. Builds exist for Windows on x86_64 and Arm64, macOS, and Linux through tarballs or APT and YUM repositories.

Best for: People who want a full desktop proxy without a monthly fee.

Pricing:

• 1 to 4 users: $50 per user, one-time, covers Charles 5.x
• 5 or more: $40 each; 10 or more: $30 each
• Site licence: $400; Multi-Site: $700
• 30-day free trial

Watch out for:

• The licence stops at the next major version. Upgrading costs 40% of the original price unless the new version arrives within three months of purchase.
• Its Java-based interface looks dated next to Proxyman or HTTP Toolkit.

Official site: Charles Proxy.

Proxyman

Proxyman started as a Mac app and now ships for Windows and Linux too, with one licence covering all three. It has the debugging tools Fiddler users reach for, including breakpoints, map local and map remote, scripting, diffing and network condition simulation, plus imports from HAR and Charles files. Companion apps for iOS and Android capture traffic on the device itself.

The Proxyman pricing page sells perpetual licences rather than only subscriptions. Standard is $89 once for one seat with a year of updates. Personal is $99 for two desktop and two mobile seats. Both include the iOS and Android apps. Teams of five or more can choose perpetual seats or a $12 per seat monthly subscription billed yearly.

Best for: iOS and Android developers who want a modern proxy and mobile capture apps.

Pricing:

• Trial: free, limited to one debugging rule
• Standard: $89 one-time, 1 seat, 1 year of updates, iOS and Android apps included
• Personal: $99 one-time, 2 desktop and 2 mobile seats, iOS and Android apps included
• Team: $99 per seat, one-time, minimum 5 seats; renewal $79 per seat
• Team Subscription: $12 per seat per month, billed yearly, minimum 5 seats

Watch out for:

• The free trial is hobbled: one debugging rule, and no breakpoints, map local, scripting or HAR export.
• Updates stop after a year on perpetual licences unless you pay $49 to renew.

Official site: Proxyman.

mitmproxy

FiddlerScript users should look here first. mitmproxy is a free, MIT-licensed proxy whose add-ons are plain Python, so logic such as rewriting a header, blocking a host or saving every token takes a few lines. It comes in three forms: mitmproxy in the terminal, mitmweb with a browser interface, and mitmdump for headless runs.

Version 12.3.1 was uploaded to PyPI on October 25, 2026 and needs Python 3.12 or later. The mitmproxy site offers a Windows installer and Microsoft Store listing, Linux binaries, Homebrew and a Docker image, which also makes it the easiest of these to run on a server or in CI.

Best for: Developers and testers who automate traffic changes or run a proxy headless.

Pricing:

• Free and open source, MIT licence

Watch out for:

• The interfaces are basic next to Fiddler's. mitmweb covers browsing flows, but composing and organising requests is clumsier.
• Installing from PyPI needs Python 3.12 or newer.

Official site: mitmproxy.

Burp Suite Community Edition

If you used Fiddler to poke at web app security, tampering with cookies or replaying requests with changed parameters, Burp Suite is the industry tool for that job. The free Community Edition includes the intercepting proxy and history, Repeater for editing and resending requests, Decoder, Sequencer and Comparer, and runs on Windows, macOS and Linux.

It is a testing tool more than a debugger. There are no AutoResponder-style mocks or rules for app developers, and the paid Professional edition, at $499 per user per year, adds the scanner and the full Intruder. Burp also ships with a built-in browser that is already set up to use its proxy.

Best for: Developers and testers checking web apps for security bugs.

Pricing:

• Community Edition: free
• Professional: $499 per user per year

Watch out for:

• The Community download page lists no saved project files, no search and only a demo of Intruder, so long sessions are hard to keep.

Official site: Burp Suite Community Edition.

Wireshark

Wireshark works one layer down. It captures every packet on a network interface and decodes hundreds of protocols, so it sees DNS lookups, TCP resets and TLS handshake failures that never reach an HTTP proxy. It is free and open source, and version 4.6.9 ships installers for Windows x64 and Arm64, with Npcap bundled, and a universal macOS image.

It can also read HTTPS, but differently from Fiddler. Instead of installing a certificate, you point the browser at a key log file through the SSLKEYLOGFILE variable, and Wireshark uses those keys to decrypt the capture. It cannot edit or resend anything.

Best for: Network and backend engineers chasing problems below the HTTP layer.

Pricing:

• Free and open source

Watch out for:

• The Wireshark TLS wiki says the key log method does not work with Safari, and decrypting with an RSA key fails on TLS 1.3 and (EC)DHE cipher suites.
• It is read-only. You cannot set breakpoints, change a response or replay a request as you do in Fiddler.

Official site: Wireshark. Our listing: Wireshark.

How to choose

When to stay with Fiddler

Fiddler Classic is still a fine choice for personal, non-commercial debugging on Windows, with FiddlerScript and AutoResponder intact. For work, Fiddler Everywhere makes sense if your team already buys Telerik tools or wants one vendor for Windows, macOS and Linux seats. The Fiddler Everywhere purchase page lists Pro at $13 per user per month on a yearly plan, and Enterprise at $37, yearly only.

Frequently asked questions