TOML to JSON

You open a Cargo.toml, a pyproject.toml or some tool config and you need to see the shape of it, or feed it to a script that only speaks JSON. Pulling in a TOML library just to take a look is overkill. Paste the snippet on one side and the tree shows up on the other: plain keys, strings, numbers, booleans, arrays and dotted tables all come out ready to use.

There is no library behind this: it is a subset parser that walks the file line by line. A header like [server.tls] creates the nested object, and everything after it lands inside until the next header. What it leaves out matters as much as what it handles. Double bracket arrays of tables are not recognised, an inline table in braces comes back as raw text, and a dotted key on the left of the equals sign becomes one literal key with a dot in its name.

Read the output before you trust it, especially on large files. Comments are cut from the first hash preceded by whitespace, so a string containing that character mid value comes out truncated. TOML dates arrive in JSON as plain text, not as a dedicated type. For a full pyproject with double brackets and multiline strings, reach for a real parser: tomllib in Python 3.11 or the toml CLI. Everything runs in your browser.