UUUP Tools

Data Tools

Convert JSON to TOML Online

Convert JSON to TOML in your browser. Invalid JSON shows an error, and conversion stays on the page—useful for Cargo, pyproject, and other TOML-first config workflows.

Quick switch→TOML to JSON
JSONTOMLConverter
Quick switch:TOML to JSONJSON to YAMLTOML Formatter

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Use cases

  • Rewrite JSON config as TOML
  • Prepare samples for Cargo or pyproject-style files
  • Move data between JSON and TOML tooling

How to use

  1. Paste valid JSON
  2. Convert
  3. Copy the TOML result

Example input and output

JSON

{"name":"uuup","version":"1.0.0"}

TOML

name = "uuup"
version = "1.0.0"

FAQ

Does it validate JSON first?

Yes. Invalid JSON shows an error and does not produce partial TOML.

Is the data uploaded?

No. Conversion runs locally in the current page.

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TOML to JSON

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JSON to YAML

JSON to YAML Converter Online

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Convert JSON to YAML in your browser with 2- or 4-space indentation. Invalid input shows an error, and conversion stays on the page—useful for config migration, API samples, and more readable archives.

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Normalize spacing, blank lines, comments, and sections in TOML without changing key or value semantics. Processing runs locally.

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