Image Resizer
Change an image's pixel size — for profile pictures, uploads with dimension limits, and everything else.
Your image is processed entirely in your browser — it is never uploaded to a server.
About this tool
Pick an image and its current size appears. Type the width or height you need — with 'keep aspect ratio' ticked, the other dimension follows automatically, so the picture never stretches. Untick it only if you really want an exact, possibly distorted, size.
Resizing down is lossless-in-effect (you're discarding pixels you chose to discard). Resizing up is interpolation — the browser invents the in-between pixels — so enlarged images look softer. For profile pictures and upload limits, down is almost always the direction you want.
How to use it
- Choose an image — its dimensions appear.
- Type the new width or height.
- Pick a format and press Resize & Download.
Frequently asked questions
What size do common platforms want?
Instagram posts 1080×1080, X/Twitter profile 400×400, Facebook cover 820×312, LinkedIn profile 400×400. Platform rules change, but these are the long-standing values.
Can I enlarge a small image?
Yes, but it will look softer — enlarging invents pixels rather than recovering detail.
Is my image uploaded?
No — resizing happens in your browser.