Wysee Markdown

WYSIWYG Markdown editor with print, rendered diff, intelligent change control, and advanced authoring features — for VS Code and VSCodium.

📖 Full documentation →

Features

Visual editing

WYSIWYG canvas — Markdown files open in a rendered canvas. Double-click any block to edit its raw Markdown in an inline panel with live side-by-side preview.
Block insertion — (+) buttons between blocks for inserting new content with live preview.
Formatting shortcuts — Ctrl+B (bold), Ctrl+I (italic), Ctrl+K (link) in the edit panel.
Find — Ctrl+F with match highlighting, case sensitivity, and prev/next navigation.
Image paste — Ctrl+V with a clipboard image saves a PNG and inserts the reference.
Context menu — Right-click to insert headings (H1–H6), links, images, tables (up to 16×32), code fences, mermaid fences, task lists, footnotes, and horizontal rules.

Rendered diff and change control

Side-by-side rendered diff — Visual diff with color-coded block backgrounds, inline word-level highlights, diagonal-stripe placeholders, and synchronized scroll.
Diff gutter indicators — Blue/green/red gutter marks in the regular editor. Click to jump to the diff view.
Hunk navigation — ▲/▼ buttons with counter, Alt+Shift+Up/Down shortcuts, focus pulse animation.
Approval matrix export — Export a ZIP bundle with a styled XLSX workbook and self-contained review HTML. Each hunk becomes one row with rendered before/after card images, approval dropdown, and review link.
Commit-based comparison — Compare any two revisions via QuickPick with recent commit history, or paste hashes manually. Working tree diff is the one-click default.
Ad hoc diff support — Side-by-side diffs opened via code --diff or codium --diff gain full Wysee rendering, hunk navigation, and export support.
AI-assisted summaries — Optional AI-generated change summaries grounded in document context and Git revision metadata. Configure via the built-in settings panel or .wysee/ai-config.yaml. Supports any OpenAI-compatible endpoint including local models (Ollama, LM Studio). Per-model request scheduling, cancellation support, four built-in prompt templates, and field-level config validation. AI failure never blocks export.

Rendering

Syntax highlighting — Language-specific code coloring with customizable syntax styles and per-language overrides.
Mermaid diagrams — Fenced mermaid blocks render as interactive diagrams in the canvas, print, and export.
KaTeX math — Inline $...$ and block $$...$$ math expressions.
Footnotes — [^N] references as superscripts with a footnote section. Editable from the referencing block.
Strikethrough — ~~text~~ with line-through rendering.

Print and export

Print / PDF — Browser-based print with configurable page size, margins, page numbers, mirror margins, and code wrapping.
PDF via headless Chrome — Save PDF… uses a local Chromium installation for direct export.
Export options — Persistent bottom-bar "Export options…" popup with Print, Save PDF, Export Approval Matrix, and Configure AI.

Theming

Document styles — Match Editor Theme, Light, Dark, or custom JSON styles with element-level CSS.
Syntax styles — Match Editor Theme, Light, Dark, or custom token-level CSS with per-language overrides.
Print profiles — Page layout, margins, page numbers, mirror margins, and linked document styles.
Style panel — Side panel with live preview for all three style types.

Utilities

Spellcheck — Red wavy underlines on misspelled words. Right-click to add to dictionary or ignore.
Word count and statistics — Word count in the bottom bar. "More Stats" modal with reading time, character counts, code lines, and dangling reference detection.
Scroll sync — Bidirectional block-anchor scroll synchronization between canvas and source editor.

Installation

Install from the VS Code Marketplace or Open VSX for VSCodium.

Or install from VSIX:

code --install-extension wysee-md-0.11.0.vsix

Quick start

Open any .md file — it opens in the Wysee canvas by default.

Double-click a block to edit its raw Markdown
Click (+) between blocks to insert new content
Right-click for the Insert MD Block menu
Click Export options… in the bottom bar for print, PDF, or approval matrix export
Toggle Sync scroll to link canvas and source scrolling

To open in the standard text editor, use Open With... → Text Editor.

AI-assisted summaries

Open the configuration panel via the command palette: Wysee: AI Config: Settings, or via the "Configure AI…" entry in the export menu.

The panel provides a form-first interface for model configuration, prompting, context settings, and output options. A collapsible raw YAML editor at the bottom is bidirectionally synced with the form and validates every field as you type. Changes are saved to .wysee/ai-config.yaml in your workspace root.

Example configuration:

models:
  - name: Qwen3-Coder 30B
    provider: ollama
    model: qwen3-coder:30b
    endpoint: http://localhost:11434/v1
    auth: none
    chatPath: chat
    requestScheduling:
      mode: sequential
    options:
      temperature: 0.3
      maxTokens: 2000

  - name: GPT-4o Mini
    provider: openai
    model: gpt-4o-mini
    endpoint: https://api.openai.com/v1
    auth: bearer
    apiKey: ${{ secrets.OPENAI_API_KEY }}
    requestScheduling:
      mode: parallel
      maxConcurrent: 6

activeModel: "Qwen3-Coder 30B"

context:
  sectionContext:
    mode: fullMarkdown
  hunkCommitProvenance: true
  hunkCommitLimit: 10

prompting:
  template: default-review-summary

Store secrets via the command palette: Wysee: AI Config: Set Secret…

When exporting an approval matrix, a QuickPick lets you select a model or continue without AI. Summaries populate column C of the workbook. Cancel during generation to choose Discard or Export with existing summaries. AI failure never blocks the export.

Preview what the model receives: Wysee: AI Config: Preview Prompt

Supported Markdown

CommonMark/GFM basics, headings, paragraphs, lists (nested, ordered, task), blockquotes, tables, links, images with {width, align} attribute syntax, fenced code blocks with syntax highlighting, mermaid fences, strikethrough, footnotes, and print directives ().

Requirements

VS Code 1.90+ or VSCodium equivalent
Desktop only (not supported in VS Code for the Web, Codespaces, or remote hosts)

License

Apache License 2.0

📖 Full documentation · Developed by Grainpool Holdings LLC

Wysee Markdown

grainpool

Wysee Markdown

Features

Visual editing

Rendered diff and change control

Rendering

Print and export

Theming

Utilities

Installation

Quick start

AI-assisted summaries

Supported Markdown

Requirements

License