A Visual Studio Code extension that renders presentation files directly inside the editor.
All rendering is implemented through custom JavaScript parsers
No native bindings and no external office applications are required.
The extension reads the raw file, interprets its internal structure, and displays slides using HTML/CSS inside a VS Code webview.
Supported formats
Format
Rendering Status
Technical Notes
PPTX (.pptx/.pptm/.potx/.potm/.ppsx/.ppsm)
Mostly implemented
Full ZIP parsing through JSZip. Text, images, shapes, basic backgrounds. Charts (EMF/WMF) and advanced grouping not handled.
PPT (.ppt/.pps/.pot)
Partial
Parsed via CFB. Implementation handles text records and basic background detection. Images, drawings, tables, EMF/WMF graphics are not implemented.
ODP (.odp)
Strong support
XML-based parsing. Text, images, tables and backgrounds implemented. Produces the most consistent results.
KEY (.key)
Basic preview only
Keynote APXL parser. Text, images and simple shapes. No proper layout engine (Keynote layout cannot be reconstructed reliably). Drawing operations, pinned geometries, and advanced vector elements are not handled.
Usage
Right-click a presentation file
Choose "Open with Presentation Viewer"
Use the toolbar:
◀ / ▶ to move between slides
Zoom buttons to scale the slide
Slide counter to jump around
Features
Core
Custom parsing pipeline per format
Renders slides using plain HTML/CSS (no canvas dependency
All logic runs inside the webview; the extension host does not interpret slides
Rendering capabilities
Text blocks (paragraphs, runs, alignment, basic style attributes)
Images (PNG/JPEG/SVG/TIFF detection through manual heuristics)
Tables (ODP-only)
Simple shapes (rectangles, ellipses, basic fills)
Background color / background image where extractable
Infrastructure
No external rendering engines
Internal fallback logic for unreadable or unsupported structures
TIFF images auto-converted to PNG inside the webview when needed
Limitations
PPTX
EMF/WMF (charts, diagrams) are not rendered
Grouped shapes are not decomposed correctly
WordArt and complex vector paths are ignored
PPT
Only text-related records and some drawing containers are parsed
No implementation for:
OfficeArt shape rendering
embedded image extraction
tables
charts
etc.
ODP
Layout engine is simplified; complex style inheritance may differ
No animation, gradients may be approximated
KEY
APXL provides object definitions but no layout engine; positioning is approximate.
Complex Keynote features (builds, connects, vector instructions) are not parsed
