Image Cropper
Crop photos to custom dimensions or standard aspect ratios (1:1, 16:9, 4:3, 9:16).
Drop your image here
Drag & drop single photo for Studio Mode, or multiple photos for 1-Click Batch Processing
Your images stay on your device
Processing happens 100% locally in your browser. Files are never uploaded to any cloud server.
How to use this tool
Upload Image
Drop your photo into the crop canvas.
Adjust Crop Bounds
Drag the bounding handles or select an aspect ratio preset.
Apply & Download
Click Crop Image and download your framed masterpiece.
Why use Image Toolkit?
Preset Ratios
Instant 1:1, 16:9, 4:3, 3:2, 9:16, and Free-form cropping.
Live Dimensions
Displays real-time pixel dimensions as you drag the crop zone.
How Image Cropper Works in Your Browser
Unlike conventional online conversion websites that upload your files to remote cloud servers, Lumino processes your media 100% client-side inside your browser sandbox using modern WebAssembly (WASM), WebGPU, and the HTML5 Canvas 2D API.
This means your sensitive photos, identity cards, passport scans, and proprietary design files are processed directly on your local device hardware (RAM/GPU) and are never transmitted across the internet.
Everything You Need to Know
Clear answers on privacy, security, file limits, and image quality.
Related Image Tools
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Aspect Ratio Calculator
Calculate exact simplified aspect ratios and find target scaling dimensions.
Image Rotator
Rotate images 90°, 180°, 270° or any custom degree angle smoothly.
Image Flipper
Mirror flip images horizontally or vertically in one click.