Why format YAML
YAML is indentation-sensitive, so inconsistent spacing easily breaks configs. This tool re-parses and re-serializes your YAML with clean, consistent formatting.
YAML Formatter
Paste your YAML to reformat it with consistent, clean indentation.
How it works
- 1
Paste your input into the editor.
- 2
Choose format / mode options if available.
- 3
Copy the transformed output (it usually updates as you edit).
Why use this tool
- Runs entirely in your browser — nothing is uploaded to a server.
- 100% free, no sign-up, no limits.
- Works in any modern browser — no app install, no extension, no account.
How to use YAML Formatter
Paste into YAML Formatter, tweak options, and copy the output. Formatting and conversion run in the browser for this tool.
Tips for better results
Keep a backup of original input before bulk transforms. Invalid input should show an error instead of silent corruption.
Privacy and offline-friendly processing
Whenever possible, YAML Formatter processes your data locally with JavaScript in this page. That means drafts, secrets, and unfinished work stay on your device by default. Prefer this workflow when you do not want to upload sensitive text, tokens, passwords, or files to a third-party service.
Frequently asked questions
Does this fix invalid YAML?
It shows a clear error message if the YAML cannot be parsed, rather than guessing a fix.
Is my config data uploaded?
No, everything runs locally using a YAML parser bundled in your browser.
Is my data uploaded when I use this tool?
For most FlyUtils tools, no. Processing happens in your browser with JavaScript. If a tool ever needs a server, that will be stated clearly on the page.
Is YAML Formatter free to use?
Yes. YAML Formatter is free, with no sign-up and no artificial usage caps for normal personal and work use.
Does YAML Formatter work on mobile?
Yes. The page is mobile-first, so you can paste input, tweak options, and copy results from a phone or tablet.