How to use Image Resizer
- Load your image.
- Enter a width or a height. With the ratio locked, the other fills in automatically.
- Download the resized image.
- Common targets: 1200px wide for a blog header, 1080px for Instagram, 32px for a favicon.
- Downscaling in one step gives a cleaner result than several small steps.
Upscaling cannot invent detail
Making an image larger interpolates between the pixels you already have. The result is bigger and softer, never sharper — the detail was not captured, so it cannot be recovered. Doubling is usually the practical limit before the softness is obvious. Downscaling, by contrast, is genuinely lossless in appearance and is the single most effective thing you can do to a web image.
Aspect ratio, cropping and stretching
With the ratio locked, setting one dimension computes the other and the image is never distorted. Unlocking lets you set both, which stretches the picture — occasionally what you want for a background texture, almost never what you want for a photograph. If you need exact dimensions with a different ratio, crop first and then resize.
Frequently asked questions
How do I resize without stretching the picture?
Can I make a small image bigger?
Is my data secure?
What size should an image be for a website?
Can I resize several images at once?
How do we know nothing is uploaded? Test it yourself on the privacy proof page.