Question: Can you recommend a free tool to estimate the value of my domain names?

For evaluating the worth of your domain names, HumbleWorth is a great free utility. It combines AI models with large domain data sets, including auction prices and search engine data, to give you a good idea of what your domains are worth. The tool can evaluate up to 2,000 domains at a time in batches and categorizes results as keep, drop and sell. HumbleWorth also offers daily updates on dropped domains worth money, and it's trained continually with new data to keep its assessments up to date.

Another good option is Domain Price Checker. It uses machine learning and data from more than 2.6 million domain name sales to offer a range of pricing models. It also has a range of other features, including detailed domain reports that include search volume, web traffic statistics and Google Trends data. The tool is highly customizable with a REST API, and it offers several pricing tiers to match your budget, including a free Basic plan.

If you want a full-featured site with a range of tools, check out EstiBot. EstiBot evaluates millions of domains each day and offers tools for instant appraisals, lead generation, expiring domain lists and market research. It's good for both experienced and new domain investors, offering serious research and investment tools to help you make more informed decisions.