YAML Validator
Check YAML for structural problems before you commit. Validation runs locally.
Drop a file or paste below
Validate YAML without uploading
How to use this tool
Paste YAML
Drop a config file or paste text.
Validate
See a clear pass/fail result with error detail.
Fix and retry
Edit until the config parses cleanly.
Stop bad configs early
A single indent error can take down a deploy. Validate YAML in the browser before you push to production.
Private config review
Secrets in .yaml files should not hit third-party upload converters. Format Convertly keeps parsing on-device.
Next step after a pass
Open the YAML formatter for readable indentation, or convert to JSON/TOML with Format Convertly converters when another toolchain needs a different format.
Frequently Asked Questions
More on quality loss: conversion quality guides · compression guides
Is my file uploaded?
No. Format Convertly tools run in your browser tab. Files are not sent to our servers for processing.
Is this tool free?
Yes. Use it without an account or watermark.
Does it work on mobile?
Yes — any modern phone or desktop browser that supports the required Web APIs.
Ready to convert more formats?
Browse converters or jump back to the tool above.