TOML to JSON Converter Online — Free & Private
Paste Cargo.toml, pyproject.toml or other TOML configs and get indented JSON for APIs and CI gates. Single-document only — local processing.
Developer notes
• TOML `#` comments are dropped — output is strict JSON with no comment syntax. • Single TOML document per paste. • Use compact JSON for logs or indented JSON for reviews. • Round-trip with JSON → TOML to verify shape.
When teams pick this route
• Feed TOML configs into JSON-only validators. • Compare Cargo.toml changes as JSON trees. • Bridge Rust/Python configs into JS tooling.
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
Cargo package
Sample input
Sample output
Dependencies table
Sample input
Sample output
Navigate related tools
Reverse with JSON → TOML, validate JSON via JSON validator, or minify TOML at TOML minifier.
TOML → JSON FAQ
Strict JSON output
Multi-file Cargo workspaces?
Paste one file at a time — workspace merging is out of scope.
Date/time types?
Serialized as JSON strings per TOML parse rules.
What about TOML comments?
They are removed during parse. Output is strict RFC JSON — not JSONC or JSON5 — so lines like `# manifest` never appear in the result.
Server processing?
Never — parsing is client-side only.
TOML
Convert TOML to JSON, YAML, XML, CSV, Properties and INI.
Other converter families
JSON
Convert JSON to YAML, XML, CSV, TOML, TSV, SQL, HTML, Properties and INI — all in your browser.
YAML
Convert YAML to JSON, XML, CSV, TOML, TSV, Properties and INI — cross-target TOML via Properties → TOML and INI → TOML in alsoLinks.
XML
Convert XML to YAML, CSV, JSON, TOML, TSV and HTML.
CSV
Convert CSV to JSON, XML, YAML, TOML and TSV.
TSV
Convert tab-separated values to JSON and CSV.
SQL
Parse INSERT statements to JSON and CSV.
HTML
Convert HTML to JSON, XML, YAML and Markdown.
Markdown
Convert Markdown to HTML locally.
Properties
Convert Java .properties files to JSON, YAML, INI and TOML.
INI
Convert INI configs to JSON, YAML, Properties (flat INI only) and TOML.
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Expand minified or compressed code — unminify JavaScript, CSS, TypeScript, SCSS, LESS, SQL, YAML and other formats when debugging or reviewing.
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Line-oriented JSON/NDJSON and Nginx/Apache access logs — format, filter, validate, and CSV/TSV.
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