# Jamdesk Developer Utilities
> Free, open-source developer tools for MDX, Markdown, YAML, JSON, Mermaid diagrams, and Open Graph social cards at https://www.jamdesk.com/utilities

Tools run in the user's browser wherever possible; input is never uploaded, stored, or logged.
The OpenGraph Preview fetches the entered URL through a server endpoint (browsers block
cross-site reads) and stores nothing. There are no ads, no accounts, and no usage limits.

- License: Apache 2.0 (https://www.apache.org/licenses/LICENSE-2.0)
- Source code: https://github.com/jamdesk/utilities
- Maintained by: Jamdesk (https://www.jamdesk.com)

## Tools

### MDX Formatter
URL: https://www.jamdesk.com/utilities/mdx-formatter
Format and beautify MDX files online. Free, open source, client-side. Handles frontmatter, JSX components, and markdown.

Facts:
  - Uses Prettier 3.x with the official MDX parser.
  - Handles frontmatter, JSX components, and Markdown in a single pass.
  - Runs entirely in the browser — input is never uploaded.
  - Apache 2.0 licensed; full source on GitHub.

### MDX Validator
URL: https://www.jamdesk.com/utilities/mdx-validator
Validate MDX files online. Catch syntax errors, unclosed JSX tags, and invalid frontmatter. Free, open source, client-side.

Facts:
  - Uses the remark-mdx parser — the same parser as Next.js, Docusaurus, and Astro.
  - If a file passes validation here, it compiles in your project.
  - All validation runs client-side; nothing is uploaded.
  - Apache 2.0 licensed; full source on GitHub.

### MDX Viewer
URL: https://www.jamdesk.com/utilities/mdx-viewer
Preview rendered MDX output online with live updating. See how your MDX looks with component stubs. Free, open source, client-side.

Facts:
  - Renders a live preview of MDX with JSX components shown as labeled stubs.
  - No component implementations needed — preview structure without your component library.
  - Runs entirely in the browser; input is never uploaded.
  - Apache 2.0 licensed; full source on GitHub.

### MDX to Markdown
URL: https://www.jamdesk.com/utilities/mdx-to-markdown
Convert MDX to clean Markdown. Strip JSX components, imports, and exports. Free, open source, client-side.

Facts:
  - Strips JSX components, imports, and exports while preserving Markdown content.
  - Output is standard Markdown that works in any renderer (GitHub, GitLab, VS Code).
  - Runs entirely in the browser; input is never uploaded.
  - Apache 2.0 licensed; full source on GitHub.

### HTML to MDX
URL: https://www.jamdesk.com/utilities/html-to-mdx
Convert HTML to MDX-compatible Markdown online. Migrate from Notion, Confluence, WordPress. Preserves markup as raw HTML. Free, open source, client-side.

Facts:
  - Uses rehype-parse + rehype-remark to convert HTML to MDX-ready Markdown.
  - Markup that does not round-trip cleanly is preserved as raw HTML, which is valid MDX.
  - Useful for migrating from Notion, Confluence, WordPress, or any HTML source.
  - Runs entirely in the browser; input is never uploaded.
  - Apache 2.0 licensed; full source on GitHub.

### Markdown to HTML
URL: https://www.jamdesk.com/utilities/markdown-to-html
Convert Markdown to clean HTML online. Handles headings, lists, code blocks, links, and images. Free, open source, client-side.

Facts:
  - Uses remark-rehype to produce clean, semantic HTML5.
  - Output has no inline styles or framework classes — suitable for CMS, email, static sites.
  - Runs entirely in the browser; input is never uploaded.
  - Apache 2.0 licensed; full source on GitHub.

### YAML Validator
URL: https://www.jamdesk.com/utilities/yaml-validator
Validate YAML online. Catch syntax errors, duplicate keys, and indentation issues. Shows parsed output as JSON. Free, open source, client-side.

Facts:
  - Catches duplicate keys at any nesting level (yaml package strict mode).
  - Flags tabs in indentation; YAML requires spaces.
  - Displays parsed output as JSON for verification.
  - Runs entirely in the browser; input is never uploaded.
  - Apache 2.0 licensed; full source on GitHub.

### JSON ↔ YAML
URL: https://www.jamdesk.com/utilities/json-yaml-converter
Convert JSON to YAML and YAML to JSON online. Bidirectional conversion with error detection. Free, open source, client-side.

Facts:
  - Bidirectional: JSON to YAML and YAML to JSON.
  - Lossless for standard types (string, number, boolean, array, object).
  - YAML comments and anchors are not preserved when converting to JSON (JSON has no equivalent).
  - Runs entirely in the browser; input is never uploaded.
  - Apache 2.0 licensed; full source on GitHub.

### Markdown Table Generator
URL: https://www.jamdesk.com/utilities/markdown-table-generator
Generate Markdown tables from CSV or TSV data. Paste spreadsheet data, get a formatted Markdown table. Free, open source, client-side.

Facts:
  - Accepts CSV (comma-separated) or TSV (tab-separated) input.
  - Pipe characters in cells are escaped automatically.
  - Compatible with paste-from-Excel / Google Sheets (TSV mode).
  - Runs entirely in the browser; input is never uploaded.
  - Apache 2.0 licensed; full source on GitHub.

### Mermaid Editor
URL: https://www.jamdesk.com/utilities/mermaid-editor
Edit Mermaid diagrams online with live preview. Flowcharts, timelines, pie charts, sequence diagrams. Free, open source, client-side.

Facts:
  - Live preview updates as you type, with light and dark theme toggle.
  - Supports flowcharts, sequence diagrams, timelines, pie charts, and every other Mermaid diagram type.
  - Rendered SVG is sanitized before display; runs entirely in the browser.
  - Apache 2.0 licensed; full source on GitHub.

### OpenGraph Preview
URL: https://www.jamdesk.com/utilities/opengraph-preview
Preview how any URL looks when shared on X, LinkedIn, Slack, Discord, and more. Validate Open Graph tags, check image dimensions, and fix issues. Free.

Facts:
  - Previews share cards for X, Facebook, LinkedIn, Slack, Discord, WhatsApp, iMessage, and Google.
  - Validates Open Graph tags and image dimensions, with a fix suggestion for every issue.
  - The entered URL is fetched through a Jamdesk server (browsers block cross-site reads), parsed, and discarded.
  - Apache 2.0 licensed; full source on GitHub.

## Guides

### MDX Cheatsheet
URL: https://www.jamdesk.com/utilities/mdx-cheatsheet
Syntax reference for Markdown and MDX

### MDX vs Markdown
URL: https://www.jamdesk.com/utilities/mdx-vs-markdown
Compare formats and choose the right one

## About
Jamdesk is a documentation platform. Learn more at https://www.jamdesk.com