Using a proxy grabber and checker top tool is legal in most jurisdictions for legitimate purposes: web scraping public data, testing your own infrastructure, or bypassing geo-restrictions for content you own. However, using proxies to commit fraud, bypass bans on platforms that explicitly forbid it (e.g., Twitter, Instagram scraping without auth), or accessing copyrighted material illegally may violate Terms of Service or local laws. Always respect robots.txt and rate limits.