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TOML to JSON Converter - Free Online Dev Tool | IconVault

Convert TOML to JSON and JSON to TOML instantly with validation. Free, runs entirely in your browser, nothing uploaded.

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TOML to JSON

Flip TOML configs and JSON both ways, with validation

5 of 5 free uses left
TOML input
JSON output

Your JSON appears here

5 of 5 free conversions left. Runs in your browser, nothing is uploaded.

Note: TOML dates become ISO date strings in JSON, and JSON to TOML needs an object at the root (TOML has no bare arrays or scalars).

About this tool

IconVault's TOML to JSON converter translates configs both ways, TOML to JSON and JSON to TOML, with syntax validation and clear error messages when the input is malformed. The result can be copied or downloaded, and the TOML parser loads on demand so the page stays fast.

All conversion runs entirely in your browser, so your config files are never uploaded, and the tool is free with no signup. The honest note: exotic TOML edge cases like unusual datetime forms may round-trip differently, so spot-check generated configs before shipping them to production.

Frequently asked questions

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