adfree.services | YAML / TOML / JSON Converter

YAML / TOML / JSON Converter

Convert structured data between YAML, TOML, and JSON entirely in your browser. This tool is useful for config files, metadata, app settings, and small structured payloads, and nothing you paste here ever touches server memory.

Source format

Target format

Indent size 2 spaces

Output actions

Convert, swap, copy, download, or load sample config data from one shared result block.

Source input

Paste a structured document in the selected source format.

Converted output

The converted result is ready to copy once the source parses successfully.

Validation Waiting for input

Root type --

Source size --

Output size --

Conversion notes

Choose source and target formats, then convert.

Source JSON

Target YAML

Compatibility note TOML output only supports TOML-compatible structures.

What this tool does

It parses one structured data format and re-serializes it into another, so you can move between JSON, YAML, and TOML without leaving the page.

Why it is private

The parsing and conversion happen entirely in your browser, so your configs and payloads never touch server memory.

What to watch for

TOML is stricter than JSON or YAML, so some nested or mixed structures cannot be represented cleanly.
Date values may be preserved as timestamps when the format supports them.
Comments are not preserved, because the tool converts data values rather than source formatting.

Helpful note

If the source document is valid but the target format cannot represent it well, the tool will stop and explain the compatibility issue instead of guessing.