TOML to YAML Converter

Convert TOML tables, arrays and values into YAML 1.2. Keep exact integers and review how dates are represented.

Free to useNo sign-upRuns in your browser

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Enter the inputs, then select Convert to YAML.

Your result

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Result will appear here

How TOML to YAML Converter works

Parse TOML with smol-toml and serialize YAML 1.2 with the YAML library.

Dates and date-times become quoted strings. TOML comments and formatting are not preserved. Large integers keep their digits; non-finite TOML numbers are rejected because they do not fit this conversion policy.

Concept diagram showing TOML input and yaml values output. — Concept diagram; the operation screenshots show the implemented tool.

How to use TOML to YAML Converter

Paste TOML, convert its parsed values to YAML 1.2, and review mappings, arrays and date strings before downloading.

Paste valid TOML

Include tables, arrays and values you want to convert. Duplicate keys and non-finite numbers are rejected by this conversion policy.

Convert to YAML

TOML to YAML Converter: input and settings in the implemented browser tool — Actual local browser view. Open the image to read it at full size.

Convert to YAML

Select Convert to YAML to generate YAML 1.2 from the parsed TOML data. Check nested mappings and array values in the output; comments and source formatting are not carried across.

Convert to YAML

TOML to YAML Converter: tool result in the implemented browser tool — Actual local browser view. Open the image to read it at full size.

Copy YAML or download converted.yaml

Generate YAML 1.2 and check nested mappings, array values and date strings. Copy the text or download converted.yaml.

Convert to YAML

TOML to YAML Converter: review the details in the implemented browser tool — Actual local browser view. Open the image to read it at full size.

Convert TOML configuration, large integers, and dates to YAML

Move configuration values between formats and check the destination representation.

Move configuration values into YAML

Convert the data structure, then adapt application-specific keys in your destination configuration. This page does not verify an application's configuration schema.

Convert to YAML

Developer input and configuration represented by document cards. — Prepare the input. Concept illustration.

Keep a large integer readable

Use a TOML integer whose digits must remain exact. The converter passes BigInt values to the YAML serializer rather than rounding through JSON numbers.

Convert to YAML

A developer example flowing from input to reviewed output. — Inspect an example. Concept illustration.

Review date representation

Inspect TOML dates and date-times in the YAML output. They become quoted strings so their representation is explicit.

Convert to YAML

Developer output handed to the next stage of a workflow. — Use the result in your workflow. Concept illustration.

YAML mappings, sequences, and quoted date strings

The output represents configuration values in YAML syntax, with dates handled under this page's conversion policy.

The YAML output represents the parsed TOML mappings, sequences and scalar values. Dates and date-times become quoted strings; source comments and formatting are omitted.

Convert to YAML Convert to YAML

A developer result reviewed alongside its source. — Review the returned output. Concept illustration.

Missing comments, non-finite numbers, and YAML compatibility

Check value representation and destination rules instead of assuming format conversion verifies an application's configuration.

Check date strings against the destination application. TOML comments are omitted, and a generated YAML document does not establish application compatibility.

The input is limited to 100,000 characters, and duplicate keys or non-finite TOML numbers are rejected. Large integer digits remain exact in the generated YAML; check your destination's numeric handling and date-string requirements before using it there.

Convert to YAML Convert to YAML