Browser-only tool
OKF validator
Paste a Markdown file and check whether it includes the frontmatter fields expected by this guide. Content is processed in your browser and is not uploaded to this website.
Paste Markdown
What this validator checks
- YAML frontmatter exists at the top of the Markdown file.
- `type`, `title`, `description`, and `tags` are present for this guide profile.
- Recommended fields `resource` and `timestamp` are reported as warnings when missing.
- The Markdown body is present after the frontmatter block.
The OKF draft treats `type` as the required field. This site checks additional guide fields because they make examples, previews, and SEO-friendly summaries easier to maintain.
Reference example
A valid starter document
---
type: Website Page
title: Open Knowledge Format Validator
description: A browser-only tool that checks basic OKF frontmatter fields.
resource: https://openknowledgeformat.online/okf-validator/
tags: [okf, validator, markdown]
timestamp: 2026-06-17T00:00:00Z
---
# Purpose
This page helps users test whether a Markdown document includes the fields expected by this guide.