YAML Formatter
Tidy and normalize YAML formatting.
Input
Output
This is a fast, in-browser formatter for everyday tidying. For complex source files, a dedicated build-time formatter may produce different results.
What Is the YAML Formatter?
The YAML Formatter is a free online tool that lets you tidy and normalize YAML formatting. It runs entirely in your browser — your text and files never leave your device, so it's fast and private. There's nothing to install and no sign-up required.
How It Works
Using the YAML Formatter takes seconds. Paste or type your content into the input area (or upload a file where supported), adjust any options to fit your needs, and the result updates instantly. You can then copy the output to your clipboard, download it, or clear everything and start again. Because all processing happens locally with JavaScript, it works offline once the page has loaded.
When to Use It
Reach for the YAML Formatter whenever you need a quick, reliable way to tidy and normalize YAML formatting. It's popular with writers, students, developers, marketers and anyone who works with code & data day to day. Bookmark it alongside the other Code & Data in our toolbox so it's always one click away.
Frequently Asked Questions
- Is the YAML Formatter free to use?
- Yes. Every tool on the site is completely free, with no account, login or download required.
- Is my data private?
- Absolutely. The YAML Formatter processes everything locally in your browser. Your text and files are never uploaded to a server, so your data stays on your device.
- Does it work on mobile?
- Yes. The YAML Formatter is fully responsive and works on phones, tablets and desktops in any modern browser.
- Do I need to install anything?
- No installation is needed — it runs in the browser. We also offer an optional browser extension and mobile app for quick access to popular conversions.
Last reviewed: 2026-06-27