Image Resizer — Resize by Pixels, Percent & Social Presets
Resize images by exact pixel dimensions, percentage, or social media presets with aspect ratio lock. 100% in-browser processing.
Upload an image to resize
JPG, PNG, WebP, GIF, BMP · Max 25MB
What is Image Resizer?
Resizing image dimensions to match exact display containers prevents browser layout shifts and eliminates wasted bandwidth from loading oversized assets. Our Image Resizer scales images by custom pixel dimensions, percentage ratios, or 17 standard social media presets (Instagram, YouTube, Facebook, Twitter/X) using client-side canvas interpolation in browser memory.
Designed for accuracy, speed, and privacy, this tool runs entirely on your local device with zero network latency.
How to Use the Image Resizer
- 1Upload an image file (PNG, JPG, WebP, or GIF) from your local device.
- 2Choose your resizing method: "Exact Dimensions (px)", "Percentage Scale (%)", or a "Social Media Preset".
- 3Toggle the Aspect Ratio Lock to preserve natural image proportions and prevent distortion.
- 4Select your output format and quality, then download your resized image instantly.
Formula & Calculation Logic
Computes geometric dimension scaling using bilinear canvas interpolation algorithms to maintain proportional aspect ratios and prevent non-uniform pixel stretching.
Aspect Ratio Locked Height: Height = Target Width * (Original Height / Original Width)Image Resizer Frequently Asked Questions
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