How to use the TOML Validator
- Paste your TOML into the editor, or open a file.
- Validation runs automatically as you type.
- Fix any reported error using the line and column shown.
About TOML
TOML is a minimal configuration format with clear key = value pairs and [sections]. It powers Cargo.toml, pyproject.toml, Hugo and many other tool configs.
Private by design
Developer data is often sensitive: API responses, tokens, customer records, internal configs. This TOML Validator processes everything locally in your browser tab. There is no server round-trip, no logging and no storage of your input.
Frequently asked questions
Is this TOML Validator free?
Yes. This TOML Validator is completely free to use with no sign-up, no limits and no ads inside the tool.
Is my data uploaded to a server?
No. The TOML Validator runs entirely in your browser using JavaScript. Nothing you paste is sent to DevT Pro or any other server.
What does the TOML Validator check?
It parses your input with a standards-compliant TOML parser and reports the first syntax error with its message.
Can I use the TOML Validator offline?
Yes. TOML Validator is also built into DevT Pro, a native app for Mac, Windows, iPad and Linux with 120+ developer tools that work fully offline. It is a $5.99 one-time purchase with no subscription.
