Image Dither
Claire Froelich322 downloadsPaste or drop images and dither them to black & white with live preview, saving storage space.
- Overview
- Scorecard
- Updates8
Intercepts images pasted or dropped into notes so you can aestehtically dither and resize them, saving storage space
Features
Major storage savings!
Dithering algorithms
Original (2.8MB)
Photo by SwapnIl Dwivedi on Unsplash
| Visual Example | Algorithm | Description |
|---|---|---|
| Floyd-Steinberg | Error-diffusion; best tonal quality | |
| Blue Noise | Interleaved gradient noise; organic, film-grain-like pattern with no repetition artifacts | |
| Ordered (Bayer) | Matrix-based; structured pattern | |
| Threshold | Hard cutoff; most aggressive | |
| Grayscale | Smooth grayscale conversion; no dithering |
Controls (per image)
- Threshold — black/white cut point (0–255)
- Sharpness — error spread amount (0–100%)
- Brightness / Contrast — pre-dither adjustments (−100 to +100%)
- Resize — output scale (10–100% of original dimensions)
- Invert colors — flip output black/white
Presets
- Natural Dither — Floyd-Steinberg at full size; best default
- High Contrast — Threshold algorithm at full size; bold black/white
- Blue Noise — Interleaved gradient noise at full size; organic grain
- Grayscale — Smooth grayscale conversion at full size
- Auto (max compression) — tests all presets and picks the one with the smallest output
Transparency support
The alpha channel is never modified. Transparent PNGs remain transparent after dithering.
Compression feedback
- Live size display for original and dithered output (e.g.
1.2 MB → 48.3 KB) - Percentage saved with color-coded indicator (good / warn / danger)
- Running total of bytes saved across all uses, shown in Settings
Output filename
The dithered filename is pre-filled in the modal using a configurable template and can be edited before saving. Supported tokens:
| Token | Replaced with |
|---|---|
{original} |
Original filename without extension |
{algo} |
Algorithm name (e.g. floyd-steinberg) |
{resize} |
Resize percentage (e.g. 75) |
{timestamp} |
ISO timestamp at time of save |
Filenames are automatically deduplicated. If the target name already exists in the folder, a numeric suffix is appended.
Settings
| Setting | Default | Description |
|---|---|---|
| Enabled | On | Toggle paste/drop interception |
| Default preset | Natural Dither | Preset applied when the modal opens |
| Default output width (px) | 700 | Snaps resize % to the closest value for each image; leave blank to keep original width |
| Dithered filename template | {original}-dither |
Tokens: {original}, {algo}, {resize}, {timestamp} |
Commands
- Image Dither: Enable — turn interception on
- Image Dither: Disable — turn interception off
The ribbon icon also toggles the plugin on/off.
Output format
Images are always saved as PNG to the attachment location in specified in your Obsidian preferences > Files and links.