I created Mockyard - a free, open source, and self-hostable alternative to Mockaroo. Mockyard ships as a Docker container that just runs: docker run -p 8080:8080 ghcr.io/portside-labs/mockyard Enter fullscreen mode Exit fullscreen mode Problem If you don't know what Mockaroo is, it's an online tool for generating large amounts of mock data in formats like CSV, JSON, SQL, etc. The catch is that Mockaroo is limited to 1K rows per file on the free tier , and costs $60/year if you want to generate files with up to 100K rows . It's also not open source and not self-hostable . I built Mockyard for two reasons: AI has made it possible to build things that used to live in the "I wish I had time for this" category. I needed to test CSV ingestion pipelines with hundreds of thousands to millions of records , and I wanted something that was fast, memory efficient, easy to use, and didn't require going online or installing a bunch of languages, tools, or packages .…