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Markdown · Metadata

Frontmatter Editor

Parse, edit, and validate YAML or TOML frontmatter. Built-in schemas for Hugo, Astro, Jekyll, Zola, and Docusaurus — or paste your own JSON Schema.

Runs locallyNo telemetry

Paste a Markdown file below, or drag & drop a .md file here

Frontmatter is parsed and edited entirely in your browser. YAML uses js-yaml, TOML uses @iarna/toml, and validation runs via ajv. No data leaves your device.