Markdown Metadata Editor

What Is the Markdown Metadata Editor?

The Markdown Metadata Editor is a free browser-based tool that parses YAML front matter from .md files and presents it as an editable form. Unlike text editors that treat front matter as raw text, this tool understands YAML structure — it automatically detects field types (string, date, number, boolean, array), provides appropriate editing controls for each type, and regenerates valid YAML on output. All processing happens locally in your browser using JavaScript and js-yaml — no files, content, or metadata are uploaded to any server. The tool handles Hugo, Hexo, Jekyll, and any Markdown format using standard --- delimiters.

Who Should Use This Tool?

Bloggers using Hugo, Hexo, or Jekyll need to edit front matter when migrating platforms or updating post metadata. Technical documentation teams manage author, date, and version fields across many .md files. Content managers batch-update tags, categories, and draft status. Developers editing README files or project documentation with YAML headers. Privacy-conscious users who do not want their Markdown files uploaded to online editors or cloud services. Anyone who needs a quick, reliable way to modify Markdown metadata without opening a full editor.

How to Use the Markdown Metadata Editor

Upload a .md file using the Upload button, or paste Markdown content directly into the input panel. The tool automatically parses the YAML front matter (the block between --- delimiters at the top of the file) and displays each field in an editable row. Change field values using the appropriate input control — text for strings, date picker for dates, toggle for booleans, comma-separated input for arrays. Change field types using the dropdown. Add new fields with the + Add field button. Delete fields with the ✕ button. Switch to the Diff tab to see a before/after comparison. Click Download to save the modified .md file. All processing is instant and local.