JSON to TOML Converter Online — Free & Private

Developer notes

• JSON must parse cleanly first. • Nested objects map to TOML tables. • Arrays become TOML arrays of inline tables or values as supported by the emitter.

When teams pick this route

• Bootstrap Cargo.toml from JSON exporters. • Migrate API config JSON into pyproject.toml fragments. • Quick previews before committing TOML edits.

About these options

CSV exports: choose a delimiter (Auto follows locale — semicolon on /fr), RFC-minimal vs always-quoted fields, line endings, and whether to emit a header row. CSV imports: delimiter is auto-detected from the first line (comma, semicolon, tab, or pipe) — toggle whether row 1 holds column names. JSON output (XML, YAML, or CSV sources): indentation (including compact one-line) and optional recursive key sort. JSON → XML: toggle pretty-printing and indent width. YAML output: indent width, readable vs tighter layout, and deterministic string quoting (there is no source YAML file to “preserve”). XML comments are not represented in the intermediate JSON tree.

Worked example

Navigate related tools

Validate JSON with the JSON validator, minify configs via TOML minifier, or round-trip with TOML → JSON.