Is this YAML / JSON safe for sensitive data & credentials?

Yes, 100%. All processing runs client-side in your local browser memory. No text, tokens, payloads, or logs are ever transmitted to any remote server or analytics engine.

Can I use YAML / JSON offline without internet?

Partly. This tool runs on client-side JavaScript with no external API calls, so once it is open it keeps working if your connection drops. Pages are not cached for offline use, so loading a tool needs a connection.

How does URL state sharing work?

When you click the share (link) icon, your input is compressed into a URL hash fragment (#data=...) and the link is copied to your clipboard, without storing anything on a database server.

YAML to JSON / JSON to YAML Converter (Private & Secure)

Convert YAML to JSON and JSON to YAML securely with our 100% client-side, zero server transmission developer tools and scratch pad.

How to use

Pick 'YAML to JSON' or 'JSON to YAML', then paste your input into the left pane.
The result updates live on the right; use 'Swap' to reverse the direction.

100% Client-Side Privacy: This tool executes entirely within your browser's runtime environment. No payloads, tokens, or inputs are transmitted to external servers.

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Troubleshooting Recipes & Fixes

Fix "mapping values are not allowed here" in YAML configs
Your CI/CD pipeline or Docker Compose is failing with `mapping values are not allowed here`. This usually means a colon `:` is missing a space after it, or your indentation is incorrect.
Fix "did not find expected key while parsing a block mapping"
Your YAML parser crashes with `did not find expected key`. This almost always means your indentation levels are mixed up. A child element is indented less than or equal to its parent, breaking the block mapping.

How to use

Related Developer Utilities

Troubleshooting Recipes & Fixes

Fix "mapping values are not allowed here" in YAML configs

Fix "did not find expected key while parsing a block mapping"