What is TOML and why developers use it
TOML (Tom's Obvious, Minimal Language) is a configuration file format designed to be unambiguous and easy to read due to obvious semantics. Standardized under the TOML v1.0.0 specification, it maps cleanly into a hash table or dictionary.
Unlike YAML, which relies on significant whitespace and complex indentation hierarchies, TOML explicitly defines tables using square brackets ([table]). This makes TOML the format of choice for modern package managers such as Rust's Cargo, Python's Poetry / Flit, and static site generators like Hugo.
How to parse and extract data from a TOML file
- Upload or paste your TOML configuration. Drop a .toml file (such as Cargo.toml, pyproject.toml, or config.toml) into the upload area or paste your text directly.
- Click Parse & Extract TOML. The client-side engine parses tables ([table]), inline tables ({ k = v }), arrays, and typed scalars in memory.
- Select your desired export format. Switch between formatted JSON, flat dot-notated key paths, clean YAML manifests, or a 3-column CSV table.
- Copy or download the output. Copy the converted configuration to your clipboard or download the converted file with one click.
What the TOML extractor delivers
- Formatted JSON — full nested representation preserving numbers, booleans, dates, arrays, and objects.
- Clean YAML — converted manifest format ready for Kubernetes and CI/CD pipelines.
- Flat Dot Paths — e.g.
package.name = "my_project"for rapid key auditing. - Tabular CSV Export — 3-column table showing Table, Key, and Value for spreadsheet documentation.
Supported TOML specifications and capabilities
- TOML v1.0.0 Standard — including inline tables, arrays of tables (
[[bin]]), and multiline strings. - File extensions:
.toml,.txt. - Capacity: Client-side parsing handles configurations up to 25 MB with zero latency.
Why in-browser TOML processing protects your source code
Cargo.toml and pyproject.toml files contain proprietary repository names, internal dependency registries, private package tokens, and infrastructure configurations. Uploading configuration files to remote web formatters exposes your internal dependency trees.
EasyExtract processes all TOML files locally inside your browser's JavaScript engine. No configuration lines or file bytes are ever uploaded or transmitted.
What this tool does not do
- It does not install or download remote software packages declared inside dependencies.
- It does not compile or build software; it is a structural data extractor and format converter.
Common use cases for TOML extraction
- DevOps & CI/CD: Converting
Cargo.tomlorpyproject.tomlpackage metadata into JSON for automated build scripts. - Configuration Migration: Migrating Hugo or static site configurations from TOML to YAML or JSON.
- Dependency Auditing: Extracting all pinned package versions for software bill of materials (SBOM) reporting.
TOML extraction compared with YAML and INI tools
If your configuration uses bracketed sections without typed scalars, use the INI & .ENV extractor. For indentation-based manifests, use the YAML data extractor.
For a detailed breakdown of configuration parsing, read our guide on how to convert TOML to JSON and YAML.
Frequently asked questions
What is the difference between TOML and YAML?
TOML uses explicit bracketed tables ([table]) and equals signs (key = value) without relying on indentation. YAML uses indentation and whitespace to define hierarchy.
How do I convert Cargo.toml or pyproject.toml to JSON?
Drop your Cargo.toml or pyproject.toml file onto this page and select JSON as the export format. The conversion completes instantly in your browser.
Is my configuration file uploaded to a server?
No. The parsing and format transformation run 100% locally in your browser memory using JavaScript. Nothing is transmitted across any network.
Does this tool support inline tables and multiline strings?
Yes. The parser supports TOML v1.0.0 features including inline tables ({ a = 1, b = 2 }), multiline literal strings ('''...'''), and arrays of tables ([[table]]).
Can I export TOML data to CSV?
Yes. Select CSV as the export format to download a 3-column table containing Table, Key, and Value columns.
What types of files can I parse?
The tool accepts .toml and .txt configuration files of any size.
How are dates and timestamps formatted in JSON?
ISO 8601 DateTimes and dates are converted into standard ISO date strings in the resulting JSON output.