Anki Image Rescaler

An Anki add-on that lets you rescale images in the note editor. Rescaling sets the display size via the <img> tag's width/height attributes, so the original image file is never modified or recompressed (unlike resizing, which loses quality). Every change is reversible. It also supports auto-rescale on paste.

AnkiWeb addon link: https://ankiweb.net/shared/info/1258277333

Features

• Three scopes for rescaling: the image you clicked, every image in the current field, or every image in every field of the note.
• Toolbar buttons: Image Rescale ▾ (full menu), plus dedicated Rescale Image / Rescale Field / Rescale Card buttons. Left-click applies your default size; right-click any button for per-scope options (manual size, width-only, height-only, revert, settings).
• Right-click in a field: image-rescale options are added to the editor's context menu.
• Manual Rescale dialog: enter an exact width and/or height, with an optional "remember these values" toggle.
• Auto-rescale on paste: pasted images are sized automatically (toggleable; by width or height). Paste with Ctrl+Shift+V (Cmd+Shift+V on Mac) to paste a single image without rescaling.
• Exempt fields: field names (e.g. "Text") can be marked in Settings so images pasted into them are never auto-rescaled, across every note type. Manual rescale actions still work on these fields.
• Revert: strip the add-on's sizing and return any image to its original display size, at any scope.
• Works on Windows, macOS, and Linux (right-click on toolbar buttons is handled at the Qt level so it works on native macOS toolbars too).

Repository layout

.
├── src/             # the add-on itself (this is what ships)
│   ├── __init__.py  #   all add-on logic
│   ├── config.json  #   default settings
│   ├── config.md    #   settings docs shown in Anki
│   └── manifest.json#   add-on metadata
├── build.sh         # package src/ into publications/*.ankiaddon
├── deploy.sh        # copy src/ into the local Anki addons folder for testing
├── LICENSE
└── README.md

Installation

From AnkiWeb

AnkiWeb addon link: https://ankiweb.net/shared/info/1258277333

In Anki: Tools → Add-ons → Get Add-ons… and enter the code 1258277333. Anki keeps it updated automatically.

From a packaged build

1. Build the add-on: ./build.sh (produces publications/anki-image-rescaler.ankiaddon).
2. In Anki: Tools → Add-ons → Install from file… and select the .ankiaddon file.
3. Restart Anki.

Manual install

Copy the contents of src/ (__init__.py, config.json, config.md, manifest.json) into a new folder inside your Anki addons21 directory, then restart Anki.

Configuration

Open Tools → Image Rescaler Settings…, use the Settings entry in any toolbar button menu, or edit the config via Tools → Add-ons → Config. All keys are documented in src/config.md.

Development

The source of truth is this repository. To test changes in a live Anki install, deploy the source into Anki's add-on folder:

./deploy.sh   # copies src/ into the local Anki addons21 folder

Then fully restart Anki to reload the add-on.

meta.json is intentionally not tracked: Anki generates it per install.

License

Released under the MIT License.