Web-Native Aspect Ratio Adjuster & Image Resizer

Proportional canvas coordinates designed for creative professionals and editors. Scaled entirely in your browser with zero server uploads.

Start Resizing Browse Common Resolutions

Calculator & Drag-and-Drop Crop Canvas

Input dimensions or select platform presets to calculate aspect ratios and edit your assets.

1. Pixel Dimensions

Width (px)

Height (px)

Lock Aspect Ratio

2. Templates & Presets

Platform Presets

3. Social Safe Zones

Overlay Guidelines

5. Export Templates

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Drag & Drop Image here

Supports PNG, JPG, WebP (runs locally)

1920 × 1080

16:9 Aspect

Proportional Matrix & GCD Framework

Euclidean Reduction Algorithm

Proportional Simplified Aspect Ratio

This matrix represents the Greatest Common Divisor (GCD) math used to simplify pixel densities down to core aesthetic shapes. Adjusting the inputs updates this matrix instantly.

100% Client-Side Privacy

We believe client media should remain confidential. This resizer runs entirely inside your browser using HTML5 Canvas APIs. Images are processed locally on your hardware, eliminating upload delays, server hosting overhead, and data privacy risks.

Launch Workspace

Euclidian Math Framework

AspectRatio utilizes Euclid's subtraction algorithm to determine the Greatest Common Divisor (GCD) between pixels. This enables accurate ratio mapping (e.g. 1920x1080 to 16:9) and dynamic calculation of missing width or height dimensions instantly.

View Resolutions Index

Social Media Safe Zones

Different platforms overlay distinct UI elements over your videos and images. Our built-in overlay grids visually map out the action and title safe regions for **TikTok, Instagram Reels, and YouTube Shorts**, helping you coordinate text and graphic elements without overlap.