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Paste YAML and check for syntax errors. js-yaml under the hood - supports anchors, aliases, multi-doc, and tags. Shows parsed JSON equivalent.
This yaml validator runs 100% in your browser. Nothing you paste, drop, or generate ever leaves your device - no analytics on your input, no uploads, no logs.
YAML disallows tabs for indentation - we'll flag them.
Same browser-only philosophy. Free, no signup, no upload.
Convert between YAML and JSON instantly with full type support.
Validate JSON syntax with exact line and column for every error.
Format and validate docker-compose.yml - sort services, normalise keys.
Beautify, validate, and minify JSON with sortable keys, exact error positions, and a one-click copy.
Strip whitespace from JSON to produce a single compact line.
Convert a JSON array of objects into a downloadable CSV file.
We design and ship internal tooling, dashboards, and customer-facing utilities. Tell us what you need and we'll scope it.