Is my data sent to a server?

No. This tool runs entirely in your browser. Your data never leaves your browser.

How do I convert JSON to YAML?

Paste JSON into the editor (or upload a .json file). The tool converts valid JSON to indented YAML automatically.

Remove commas after the last item: `{"a": 1,}` → `{"a": 1}`

Yes — files up to 5MB are supported. Processing happens only in your browser.

Developer Tools

Is my data sent to a server?: No. This tool runs entirely in your browser. Your data never leaves your browser.
How do I convert JSON to YAML?: Paste JSON into the editor (or upload a .json file). The tool converts valid JSON to indented YAML automatically.
What if my JSON is invalid?: Remove commas after the last item: `{"a": 1,}` → `{"a": 1}`
Can I convert large files?: Yes — files up to 5MB are supported. Processing happens only in your browser.

Free online JSON formatter and validator. Beautify, minify, and validate JSON instantly in your browser with line-level errors.

Validate JSON online with line-level syntax errors. Free, instant, and private — runs entirely in your browser.

Minify and compress JSON to a single line in your browser. Free, fast, and private.

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