Image Resizer

Why resize images?

Most images come off a phone or camera at 12–50 megapixels — far more than a web page, social post, or email needs. A 4000×3000 photo on a blog takes seconds to load and burns mobile data. A YouTube thumbnail only needs 1280×720 pixels. Resizing trims the image to the exact dimensions the destination requires, which cuts the file size proportionally and makes everything load faster.

How to resize an image

1. Drop your files — drag JPG, PNG, or WEBP images onto the upload zone, or click to browse. Up to 30 files at once.
2. Set the dimensions — enter a width and height in pixels, or switch to percent mode and scale by a percentage. Use a social media preset to fill in the exact platform dimensions automatically.
3. Lock or unlock the aspect ratio — with the lock active, height is derived from each image's natural proportions so nothing is distorted. Unlock to force an exact width × height crop.
4. Click Resize and download — each file is processed in your browser. Download individually or grab them all as a ZIP.

Resizing vs. compressing

These solve related but different problems. Resizing changes the pixel dimensions — fewer pixels means a smaller file. Compressing keeps the same pixel dimensions but lowers the encoding quality to save space. For the smallest possible result, do both: resize to the dimensions you need, then run the file through the Image Compressor. A 4000×3000 photo resized to 1280×960 and then compressed to 80% quality can drop from several megabytes to well under 200 KB with no visible loss at display size.

Social media image sizes

Privacy

Every byte stays in your browser. Resizing runs locally using the Canvas API — your files never leave your device. There is no upload step, no temporary server copy, and no account required.

Frequently asked questions