If you prefer not to download software, ProxyScrape offers a browser-based Online Proxy Checker .
Import your proxy list by dragging and dropping a .txt file. Download Proxyscrape Key Checker zip
Online Proxy Checker - Free Browser-Based Proxy Testing Tool If you prefer not to download software, ProxyScrape
Be cautious of third-party "Key Checker" tools found on forums or unofficial sites, as these often contain malware or are designed to steal your proxy credentials. Always use official links from the ProxyScrape website. Download Proxyscrape Key Checker zip
If you are looking for a tool to validate a "key," note that ProxyScrape uses or API keys rather than traditional license keys for its proxy services. How to Download and Use the Official Tool