Resize Images Online
Change dimensions, scale by percentage, or use presets for social media. Instant results, no quality loss.
Drop your image here
or browse files — PNG, JPG, WebP supported
How to Resize Images Online
SmarterSources's image resizer lets you change the dimensions of any image directly in your browser. Whether you need to resize a photo for social media, reduce dimensions for a website, or scale up an image for printing, this tool handles it all instantly.
Resize by Dimensions
Enter exact pixel dimensions for precise control over your output. Lock the aspect ratio to prevent distortion — when locked, changing one dimension automatically calculates the other to maintain the original proportions.
Resize by Percentage
Use the scale slider to resize by percentage. This is perfect when you need to reduce an image to half size (50%) or double it (200%) without worrying about exact pixel values.
Social Media Presets
Use the built-in presets for common sizes: Instagram posts (1080×1080), Facebook covers (820×312), Twitter headers (1500×500), and more. One click sets the perfect dimensions for your platform.
Frequently Asked Questions
Will resizing reduce image quality?
Downsizing generally maintains excellent quality. Upsizing beyond the original dimensions can introduce blur since new pixel data must be interpolated. For best results when enlarging, don't exceed 200% of the original size.
What does "lock aspect ratio" do?
When aspect ratio is locked (the default), changing the width automatically adjusts the height proportionally, and vice versa. This prevents your image from being stretched or distorted.
Can I resize to exact social media dimensions?
Yes! Use the quick presets to instantly set dimensions for Instagram, Facebook, Twitter, LinkedIn, YouTube thumbnails, and more. Just click the preset and download.