Fiddler Classic Commercial Use Is Moving to Fiddler Everywhere
Progress® Telerik® Fiddler™ Classic remains available for non-commercial use.
For commercial, business, organizational or revenue-generating use, Progress® Telerik® Fiddler™ Everywhere is the supported commercial Fiddler offering.
Commercial transition deadline: September 17, 2026
Public announcement date: August 3, 2026
What Is Changing
Classic Remains Available. Commercial Use Moves to Everywhere.
Fiddler Classic is a Windows-only tool available for non-commercial use under the updated Fiddler Classic EULA.
Commercial Users
Transition to Fiddler Everywhere under a commercial license, or stop using Fiddler Classic for commercial purposes.
Non-Commercial Users
Continue using Fiddler Classic if your use is personal, educational, individual learning, or otherwise allowed by the updated EULA.
Migrate Easily
Fiddler Wizard helps you migrate saved Fiddler Classic settings, filters, and rules to Fiddler Everywhere in just a few clicks. Learn how in the Fiddler Everywhere documentation.
Use Classic at Work? Start Here.
You are likely affected if you use Fiddler Classic for work or business use, software and API debugging for an organization, customer support, QA, production troubleshooting, revenue-generating projects, or use by employees, contractors, consultants, or teams.
Individual Developers and Small Teams
Use the Fiddler Everywhere trial to evaluate advanced debugging capabilities, including HTTP/2 traffic inspection, API request testing and replay, debugging on remote devices, and collaboration workflows.
Explore AI-assisted debugging with Fiddler MCP to investigate and troubleshoot traffic through your coding agent.
Start Trial Buy NowCommercial and Enterprise Teams
Contact Progress before September 18 if you need procurement, security review, reseller support, deployment guidance, or team licensing.
Contact SalesNon-Commercial Classic Users
Review the updated EULA. If your use is non-commercial, you can continue using Fiddler Classic.
Review the Updated EULAWhy Move to Fiddler Everywhere
Fiddler Classic helped define web debugging for a generation of developers. Fiddler Everywhere is the supported commercial Fiddler platform we're investing in now, with modern protocol support including HTTP/2, persistent workflows, team collaboration, AI-assisted debugging, dedicated technical support, and a regular release cadence.
Built for Modern Traffic
Capture and inspect HTTP/S traffic across Windows, macOS, and Linux, including modern protocols such as HTTP/2, gRPC, SSE, WebSockets, MessagePack, and Protobuf.
Your Debugging Setup Persists
Save filters, rules, composer requests, and capture snapshots so your debugging context is available when you return to recurring workflows.
Share Findings Across Your Team
Share captured sessions, rulesets, and API requests so teammates can review the same traffic-level evidence.
Enterprise-Ready Support and Controls
Get documentation, technical support, regular releases, and the enterprise-ready controls organizations need to deploy at scale.
Your AI Assistant Can Debug With You
Use Fiddler MCP to bring real HTTP traffic into AI-assisted development and investigate sessions faster.
Flexible Purchasing Options
Choose the purchasing option that works best for your team. Explore pricing and purchase online or connect with our sales team for enterprise needs such as procurement, security review, reseller coordination, or custom quotes. If you use Fiddler Classic for commercial use, contact Progress before the September 17 EULA transition deadline.
Frequently Asked Questions
Move Your Commercial Debugging Workflows to the Modern Fiddler Everywhere Platform Today.
Capture real traffic. Debug modern APIs. Share sessions with your team. Give AI coding assistants the HTTP execution context they need.