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Input
TOML
Limit
1 MiB
Runtime
Browser

Validate TOML values against a bounded schema

Parse TOML, project supported values into a documented schema model, and return structured violations from a supplied JSON Schema.

Local processingNo sign-upNo content logging

Validate against schema

Inputs are limited to 1 MiB and stay in this browser tab.

Paste or edit the source. Tool Swim does not upload or save it.

Paste a bounded schema. Remote references and unsupported high-complexity features are rejected.

Schema validation report

Nothing is placed in a URL, account, or remote log.

What this tool does

Strict, bounded, local processing

TOML defines no official schema vocabulary. The local contract documents how TOML-specific date-time, integer, and float values cross into schema validation.

Syntax and schema answer different questions

TOML parsing establishes typed values. A schema then checks required keys, types, ranges, arrays, and supported product rules.

Projection and limits are public behavior

Remote references, uncontrolled recursion, regex-heavy checks, and ambiguous TOML-only values fail explicitly.

Primary references

Questions and answers

Related TOML tools

TOML ValidatorParse TOML strictly and report safe diagnostics and structural facts without formatting or applying an application manifest contract.Cargo.toml ValidatorLayer documented Cargo manifest rules over TOML syntax and separate definite errors from checks requiring a workspace, filesystem, registry, or compiler.pyproject.toml ValidatorApply current PyPA metadata rules after TOML parsing and distinguish field errors from filesystem, backend, tool, and index checks.