yamltojson.dev is a collection of free, browser-based data format converters. Paste your data and convert instantly between YAML, JSON, XML, and CSV — no account, no upload, no watermark. The home page does YAML ↔ JSON; dedicated pages handle XML ↔ JSON, JSON ↔ CSV, and CSV ↔ JSON.
Developers convert between these formats constantly — turning a YAML config into JSON for an API, an XML feed into JSON for a front end, or a JSON export into a CSV for a spreadsheet. Plenty of existing tools are cluttered with ads above the fold, ask you to sign up, or quietly upload your data to a server. This site was built to do one thing well: convert fast, locally, and cleanly.
All conversion is computed locally in your browser. The tools do not send the text you paste to the site server. Your device, browser extensions, and workplace policies are outside the site's control. See the Privacy Policy for details.
yamltojson.dev is a small, focused set of free utilities for engineers. The YAML converter uses the open-source js-yaml parser; behavior is documented against the YAML 1.2.2 specification and RFC 8259.
Open the converter →Spotted a bug or want another format supported? Reach out via the contact page or email [email protected].