100% Private In-Browser Tool • Zero Uploads

Image Resizer

Change image width and height by exact pixels or percentage scale locally in your browser.

Image Resizer & Form Spec Optimizer

Resize image dimensions with pixel controls and social media presets.

Drag & drop image files here, or browse

Supports JPG, PNG, and WebP. 100% client-side local processing.

Target Dimensions

Widthpx

Heightpx

Preserve Aspect Ratio: Enabled (Proportions Protected)

Maintains original image width-to-height ratio so resized images retain clean proportions without stretching or warping.

Never Upscale Image

Prevents scaling the image beyond its original natural dimensions to preserve crisp image sharpness and avoid blurry pixelation.

Privacy GuaranteeAll pixel interpolation and target size optimization happen strictly on your device inside Web Workers.

Step-by-Step Guide

Select the image you want to resize.

Specify target width/height pixels or choose a percentage scaling preset.

Click Resize and download your scaled image immediately.

Features & Benefits

Resize by exact pixel width/height or percentage scaling (25%, 50%, 75%, 200%)

Lock aspect ratio toggle to prevent distortion

High-quality canvas bilinear & lanczos resampling

100% in-browser execution — zero server uploads

Not if you keep the aspect ratio lock enabled. ImgZero automatically calculates the proportional height when you change width (and vice versa).

Your files stay on your machine. No server uploads and no file-content tracking.

Zero Server Bandwidth Delay

Instant Web Worker Speed

Works Fully Offline