DevToolsmith

TOML Validator

Validate TOML syntax and report malformed values, duplicate keys and broken tables.

Runs 100% in your browser — nothing is uploaded

TOML input
Tip: drop a file here36 chars · 36 bytes · 4 lines
Result
0 chars · 0 bytes · 0 lines

Up to 200,000 input characters and 2 million output characters. Processing stays on this device.

Use TOML Validator

Validate TOML syntax and report malformed values, duplicate keys and broken tables. Start with the sample, select the options and run the tool. Copy or download the result after reviewing it.

Behavior and limits

Validation uses the TOML parser directly and accepts TOML numeric and date syntax. It does not check the settings expected by Cargo, a deployment service or another application. Use that application’s validator for configuration semantics.

Example input

[server]
port = 8080
enabled = true

Expected behavior for the example

Valid TOML. Syntax checks passed; application-specific settings are not checked.

Check important output in the application that will consume it. Use the tool directory to find related formats and tasks.

Frequently asked questions

How does TOML Validator handle my input?

Validation uses the TOML parser directly and accepts TOML numeric and date syntax. It does not check the settings expected by Cargo, a deployment service or another application. Use that application’s validator for configuration semantics.

Is my input uploaded or saved automatically?

Processing runs locally in this browser. Input and results are not saved automatically. Downloads happen only when you choose them. The static preview blocks scripts and external resources when one is available.