Image Resizer

Resize images with social media presets for Instagram, YouTube, Facebook, and more.

Drop an image here or click to upload

PNG, JPG, WebP — any size

What Is the Image Resizer?

The Image Resizer lets you change the width and height of an image to exact pixel values, percentages, or popular social media presets. A live preview updates as you adjust the settings, so you can confirm the result before downloading.

All resizing happens in your browser. Images are never uploaded, which keeps the tool fast, free, and private.

How to Resize an Image

  • Upload or drop an image.
  • Choose a social media preset, or enter width and height in pixels.
  • Keep Maintain aspect ratio on to avoid distortion, or turn it off for custom stretching.
  • Preview the result and download your resized PNG.

Social Media Presets

The built-in presets cover the most commonly recommended dimensions: Instagram square posts (1080x1080), Instagram stories and Reels (1080x1920), YouTube thumbnails (1280x720), Facebook profile and cover sizes, Twitter/X header images, and Pinterest pins. Selecting a preset automatically fills in the exact width and height for you.

Understanding Aspect Ratio

Aspect ratio is the relationship between an image's width and height. Changing only one dimension breaks the ratio and distorts the image. With Maintain aspect ratio enabled, the resizer scales both dimensions proportionally, and the Aspect Ratio Calculator is available if you need to work out dimensions for a specific ratio like 16:9 or 4:3.

Tips

  • Resize before compressing for the smallest final file size.
  • Use 100% zoom in the preview to check sharpness after resizing.
  • For print, target at least 300 DPI at the final print size.
  • Downscaling improves perceived sharpness — it's a great way to clean up large camera photos.

Frequently Asked Questions

How do I resize an image?+
Upload an image, then either pick a social media preset or enter a custom width and height in pixels. You can also scale by percentage. Maintain aspect ratio keeps the proportions intact so your image isn't stretched.
Which formats are supported?+
You can upload JPG, PNG, WebP, and other common image formats. The resized result is downloaded as a PNG by default, which preserves quality and transparency.
What are the social media presets for?+
Presets apply the exact pixel dimensions recommended for Instagram posts (1080x1080), stories (1080x1920), YouTube thumbnails (1280x720), Facebook covers, and more — so you don't have to look up the numbers yourself.
Will enlarging a small image make it blurry?+
Enlarging an image interpolates new pixels, so the result can look softer or blurry. For best quality, resize images that are already at least as large as the target dimensions.

Related Tools

Image CompressorImage Format ConverterImage CropAspect Ratio Calculator

Image Resizer — free online resize image online, image resizer, resize image for instagram, photo resizer free, change image dimensions, resize image to pixels, social media image size, scale image online. No signup required. Works in your browser.