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JSON ↔ YAML ↔ TOML converter — offline

Convert configs between formats without them ever leaving your browser.

100% private — files never leave your device
JSON
YAML

How it works

  1. 1

    Pick the source and target formats.

  2. 2

    Paste your config — conversion is live.

  3. 3

    Copy the result from the output pane.

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Frequently asked questions

Are my config files uploaded to convert them?

No — parsing and conversion run with open-source libraries in your browser. Config files often contain credentials, which is exactly why they shouldn't touch upload-based converters.

Which conversions are supported?

Any direction between JSON, YAML, and TOML. The output updates live as you type.

Why does TOML sometimes refuse to convert?

TOML requires an object (table) at the top level — a bare array or scalar can't be represented, and null values have no TOML equivalent.