Image Resizer

What is Image Resizer?

Resize any image to exact pixel dimensions or a percentage of its original size, directly in your browser. Works with PNG, JPG, WEBP and GIF, uses high-quality hermite filtering for crisp downscales, and lets you lock the aspect ratio so you never accidentally stretch a photo. Perfect for preparing images for web uploads, email attachments, profile pictures, or fitting a specific size spec required by a form or marketplace.

How do I use Image Resizer?

1. Drop an image onto the upload zone (or click to browse).
2. Enter the target width, height, or a scale percentage.
3. Toggle "Lock aspect ratio" if you want width and height to stay proportional.
4. Click Download to save the resized image.

Image Resizer by the numbers

Formats in

PNG, JPG, WebP, GIF, BMP, AVIF

Formats out

PNG, JPG, WebP

Max input

50 MB

Filter

Hermite / bicubic, browser-native

Privacy

Canvas-local, never uploaded

Common use cases for Image Resizer

• Resizing a product photo to 1080×1080 for Instagram.
• Shrinking a camera JPG to 2000 px wide for a blog header.
• Preparing a passport photo to exact millimetre specs.
• Generating a 150×150 thumbnail for a forum avatar.
• Downscaling a 12-megapixel phone shot to fit an email quota.

Common pitfalls and how to avoid them

• Output looks soft — You upscaled past the source size. Downscaling is lossy-but-sharp; upscaling always softens. Use AI Upscaler (ships later) for large growth.
• Aspect ratio got squished — Toggle "Lock aspect ratio" before editing. If the image is already distorted, crop first with Image Cropper.
• PNG saves bigger than the original — PNG is lossless, so resized PNGs with complex gradients can grow. Switch the output to WebP or JPG for a smaller file.

When should I use Image Resizer?

Choose Image Resizer when you need a specific output size. For shrinking file weight without changing dimensions, use Image Compressor. To resize many images at once, use Bulk Resize, which applies the same target to a folder of files.