Edit, split, or preview
Switch the editor and rendered document layout to suit the current task.
DAOLSOFT LABS · WINDOWS
Geulbom
A Windows Markdown editor with preview beside your writing
.NET 10 and WPF host a WebView2 and CodeMirror 6 editing experience. Write Markdown, preview Mermaid diagrams, and export the result to HTML or PDF.
Microsoft Store · Coming soonContact us about Geulbom
An install link will be added here after the Store listing is ready.
Spring notes.md — GeulbomPreview
Spring notes
Today
- ✓ Write a draft
- □ Review together
MarkdownUTF-8 · CRLF
TECHNOLOGY
Windows and web technologies meet in one editor.
WPF owns the window and local file workflow, while WebView2 handles editing and document rendering. A defined JSON message bridge connects the two sides.
- 01.NET 10 · WPF
Windows shell, local files, recovery, and export workflow
- 02WebView2
A single web surface for the editor and preview
- 03CodeMirror 6
Markdown editing, search and replace, and document commands
- 04Markdown · Mermaid
Tables, tasks, code, and text-defined diagram rendering
- 05HTML · PDF
Document export with local images and rendered diagrams
FEATURES
From writing to export
Markdown editing
Continue lists, wrap syntax, search and replace, and use familiar shortcuts.
Mermaid diagrams
Render Mermaid code blocks as SVG diagrams inside the document preview.
HTML and PDF export
Save the rendered result as standalone HTML or an A4 PDF document.
Document fidelity
Read UTF-8, UTF-16, and CP949 files and preserve existing line endings.
Local recovery
Keep a recovery copy on the PC for an unexpected app shutdown.
LOCAL FIRST
Documents are processed on your PC.
Geulbom does not send an open document or generated output to a DAOLSOFT server for remote storage.
Geulbom privacy policy- No account, advertising, or analytics SDK is used.
- Recent documents, settings, and recovery copies are stored locally.
- Only files selected by the user and explicit HTML or PDF exports are processed.
- External links open in the default browser instead of inside WebView2.
SUPPORT
Prepared for current Windows environments.
Contact DAOLSOFT for installation or usage questions. No standalone installer is distributed before the Store release.