Question: I'm looking for a free online tool that can automate the process of writing and maintaining regular expressions, do you know of any?

If you're in the market for a free online tool to automate writing and maintaining regular expressions, rgx.tools is worth a look. This regex generator and editor uses GPT-3.5 Turbo to generate regex patterns from text prompts. It's intended to free you from the tedium of manual labor and can generate regex for many common situations, like matching URLs, phone numbers, dates and more. It's free to use, and that's particularly useful for programmers who often wrestle with regex patterns.

Another option is AI Regex. It'll turn natural language context into custom regex patterns in three steps: typing the context, submitting it for AI generation, and copying the resulting expression. It uses machine learning algorithms to spot patterns in data and generate optimized regular expressions. The tool is designed to free up time for developers and data analysts and to reduce errors, so you can be confident the generated expression is correct.

If you want more than just regex generation, ManyExcel is an AI tool that can help you get more out of Excel and Google Sheets. It's got an AI Formula Generator, an AI Regex Generator and an AI Script Generator, among other abilities. It's got a free plan with limited use, but it's got a lot of tools for automating different spreadsheet chores.

Last, Formula Bot is another general-purpose tool that uses AI to convert text into a variety of other formats, including SQL queries, Excel formulas and regex patterns. It's got tools for data analysis and automation, too, so you can get more out of your data without having to write as much code. It's got several pricing tiers, but its free tier is pretty useful for automating your own tasks.