👉 Live Demo
👉 Download under Releases

Offline-first web viewer for Concepts (.concept) files.
v0.5.0 adds full in-browser import — no external Python script required.

• Auto-import .concept — converts on load (no script needed).
• Cleaner UI/UX
  • Collapsable top bar
  • Consistent section cards (light/dark)
  • Files panel simplified; Advanced mode for JSON/Images
  • Log panel (collapsible)
• Dark Mode + White lines — grouped, toggleable
• PNG export — @1×/2×/4× via offscreen canvas (auto filenames incl. version/zoom/mode)
• SVG export — working again (experimental, see Known Gaps)
• ZIP download — name.zip with name.json + generated name_thumb.jpg
• Persistence — remembers Collapse, Advanced, Log open, Dark, White lines, Images opacity
• Keyboard shortcuts — all listed in the Info modal

1. Open the viewer

   • viewer/ConceptsViewer_0.5.0.html in your browser
   • or try the Live Demo

2. Load data

   • Load a .concept file directly
   • or load a converted .json (+ optional images/)

3. Navigate / Export

   • Use Center / Grid / Dark / White controls
   • Export via PNG (1×/2×/4×) or SVG
   • Download ZIP for .json + thumb

4. Diagnostics

   • Use the Log drawer for quick checks

• samples/Demofile-3/Demofile-3.json (ready to load)
• Optional: open the matching images/ .
• The original .concept is included for comparison.

• Embedded images inside .concept are not applied.
• Manual loading of images from unpacked ZIP works only with .json, not .concept.
• SVG export still experimental:
  • Possible horizontal/vertical mirroring issues
  • Stroke linecaps not rounded

• 0.5.x — load embedded images in *.concept files, UI reset button
• 0.6 — improve SVG export, extend brush dynamics & auto-shapes

This project is an unofficial viewer for content created with Concepts (TopHatch, Inc.).
All artwork and trademarks belong to their respective owners.

MIT — see LICENSE.

See CHANGELOG.md for details on v0.5.0 and earlier.