Resizer & Cropper

Resizer & Cropper is a lightweight, privacy-focused Firefox extension designed to crop, flip, rotate, and resize images with ease. It features automatic background color matching for canvas expansions, a built-in eyedropper, and full offline operation.

Features

Context Menu Integration: Right-click any image on the web and choose Edit Image with Resizer & Cropper to load it instantly. Interactive Cropping: Free aspect-ratio crop or preset ratios (1:1, 16:9, 4:3, 3:2, 2:1, etc.). Precise numerical size adjustment (width/height in pixels). Rule-of-thirds visual grid overlay with draggable corner and edge handles. Canvas & Resizing Tools: Scale image dimensions (width/height) with optional aspect ratio constraint. Expand canvas area with an interactive 9-point anchor alignment grid. Auto-detect border background colors to seamlessly fill newly expanded canvas margins. Transforms & Rotations: Flip horizontally or vertically. Rotate 90° clockwise. Advanced Export Options: Save as high-quality PNG or JPEG format. Auto-replace transparent areas with background fill when saving as JPEG. Define custom target subfolders within the browser's default Downloads directory. Toggle "Always ask where to save" to choose file locations manually for each export. Built-in eyedropper tool to pick any pixel color directly from the image canvas. 100% Privacy & Security: Works entirely locally in the browser context. No telemetry, no external server calls, and no data collection. Fully compatible with Mozilla Firefox Manifest V3.