Does this preserve every detail?

Conversion preserves the supported values, not original formatting. JSON object order is irrelevant to comparison. Ordered XML keeps mixed content; table cells stay text. Read Guide for the exact rules before converting.

Is my document uploaded or remembered?

No. Documents, schemas, paths and results stay in this tab and are not saved between visits. Only safe conversion and table settings may be remembered on this device.

Combined input is limited to 1 MB, output to 2 MB and nesting to 100 levels. Processing stops after five seconds. Large results show a shortened preview; Download retains the complete successful output. Tool-specific limits and supported options are listed in Guide.

Data tools

YAML Validator

Check one YAML (YAML Ain't Markup Language) document locally without a schema.

Runs locally

Input

Output

Runs locally in your browser

Combined input: up to 1 MB. Output: up to 2 MB. Files stay in your browser.

Guide

Check whether a YAML (human-readable data format) document can be read using the supported syntax. The result updates as you edit, helping you find errors in a configuration file before using it elsewhere.

Add your documents
Paste into Input, choose an example or use Open file. Files stay in your browser.
Choose and run
Choose an example or type YAML. Validation updates after you pause. Choose Validate to check immediately.
Read and keep the result
Read Output. Copy output or Download keeps the result; errors explain what needs changing.

On mobile, choose Output to read the result. Clear removes both fields.

Validation

Validate: check exactly one YAML 1.2 document with unique mapping keys. No schema is applied.
Standard core values are supported. Custom tags, cyclic aliases and excessive alias expansion are rejected.
The alias expansion limit is 100; nesting is limited to 100 levels. Large integers must be quoted to preserve their precision.

Shortcuts

Ctrl / Cmd + Enter — Run selected action
Ctrl / Cmd + Shift + C — Copy output
Ctrl / Cmd + S — Download output
? — Show shortcuts outside text fields

Shortcuts work while focus is in the workspace. Copy and download need valid output.

Common questions

Does this preserve every detail?: Conversion preserves the supported values, not original formatting. JSON object order is irrelevant to comparison. Ordered XML keeps mixed content; table cells stay text. Read Guide for the exact rules before converting.
Is my document uploaded or remembered?: No. Documents, schemas, paths and results stay in this tab and are not saved between visits. Only safe conversion and table settings may be remembered on this device.
What limits apply?: Combined input is limited to 1 MB, output to 2 MB and nesting to 100 levels. Processing stops after five seconds. Large results show a shortened preview; Download retains the complete successful output. Tool-specific limits and supported options are listed in Guide.

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