Free Image Resizer
Resize any image to exact pixel dimensions or scale by percentage. Aspect ratio lock prevents distortion.
Drop image here or click to upload
Supports JPG, PNG, WEBP — Max 20 MB
How to Resize Images Online
Our free Image Resizer lets you change an image's dimensions precisely. Whether you need a specific pixel size for a social media post, a website banner, or a print project, our tool handles it in seconds without any software installation.
Common Image Sizes by Platform
- Instagram Square: 1080×1080 px
- Facebook Cover: 851×315 px
- Twitter Header: 1500×500 px
- YouTube Thumbnail: 1280×720 px
- Website Banner: 1200×400 px
- Email Header: 600×200 px
Aspect Ratio Lock
When "Lock aspect ratio" is checked, changing the width automatically updates the height to maintain the original proportions, preventing your image from looking stretched or squished. Uncheck to set completely independent dimensions.
Frequently Asked Questions
When making images smaller, quality is generally well-preserved. Enlarging images beyond their original size will reduce sharpness — for best results, always start with the highest resolution original.
The tool supports output dimensions up to 10,000×10,000 pixels. Very large canvases may require significant browser memory.
Uncheck "Lock aspect ratio" and enter the exact width and height for your target platform. For example, enter 1080×1080 for an Instagram square post.