J-Card Designer v0.3.9

Build: v0.3.9 / 2026-07-13 — multi-flap crop workflow — DEPLOY VERIFY 039

Adapts your own images only. No artwork is generated or invented — only cropped, scaled, rotated, repositioned, sampled for color, or paired with flat colors and type.

Ctrl+Z to undo, Ctrl+Y or Ctrl+Shift+Z to redo.

1. Source Images

Uploads appear on the canvas automatically: front image → Front, back image → Flap. Use the panel buttons below to send either image to the spine or replace a panel.

No source images uploaded yet.

2. Put Artwork on Panels

These buttons replace/update the chosen panel's main artwork.

The tracklist crop buttons add separate, movable overlay layers from the back image. They do not replace the main flap image.

3. Edit Panel Artwork

Upload artwork or choose a panel to edit.

4. Selected Artwork

No artwork selected. Click Edit Front, Edit Spine, Edit Flap, or a row above.

Crop (from source image)

Crop presets

Crop presets also recenter and fill-scale the layer. Typing exact numbers above does not.

Move / Scale / Rotate

Rotation presets

Click-drag the selected layer on the canvas to reposition it. Arrow keys nudge 1px (Shift = 10px) when no text field is focused.

5. Text
Side 1: 0:00 · 0 lines
Side 2: 0:00 · 0 lines

Durations like “Track Name (3:42)” are totaled automatically. Long lists warn before they overflow the flap.

6. Backgrounds

A panel override replaces the global background for that panel only.

7. Color Sampling

Useful when only part of a source (e.g. a tracklist crop) is placed — sample the full source's color and apply it to the whole panel so it looks continuous.

8. Guides
9. Project

Autosave keeps a local browser copy when storage allows. JSON export is still the safest backup.

10. Export
Dimensions
  • Canvas: 1219 × 1200 px @ 300 DPI
  • Physical size: 4.0625in × 4in
  • Left flap: 300 px (1.0 in)
  • Spine: 150 px (0.5 in)
  • Front panel: 769 px (2.5625 in)