Social Media Image Resizer
Resize and crop an image to the exact dimensions a given social platform expects, from one source picture.
Every platform wants something different
A post that looks right on Instagram is the wrong shape for a YouTube thumbnail, which is wrong again for a LinkedIn banner or an X header. Each platform has its own expected dimensions, and getting them wrong means your image is cropped awkwardly, letterboxed with bars, or quietly downscaled into mush. This tool sizes one source image to the preset you pick so it fits cleanly the first time.
Because the presets match what each platform actually uses, you avoid the guesswork of remembering that a thumbnail is 1280×720 or that a square post is 1080×1080.
Start big, then size down
Always work from the largest, sharpest original you have. Sizing a big image down to a platform's dimensions keeps it crisp; stretching a small one up to fit will look soft, and social feeds are unforgiving about blur. If a preset crops your image, reframe so the subject stays inside the safe area rather than getting clipped at the edge.
How to resize an image for social media
- Add your picture.
- Choose the platform and placement you are posting to.
- Download the correctly sized image.
Every platform wants a different shape
Post one image everywhere and something always gets cut: an Instagram feed leans to 4:5 portrait, stories and reels want 9:16, YouTube thumbnails are 16:9, and profile pictures are square. Sizing deliberately for the placement stops the platform cropping your subject's head off.
Keep anything important — faces, text, logos — away from the outer edges. Feeds and previews often trim a slightly different crop than the one you uploaded.
Frequently asked questions
What size is an Instagram post?
1080x1080 for a square, or 1080x1350 for the taller 4:5 portrait that fills more of the feed.
What size should a story or reel be?
1080x1920, which is the 9:16 full-screen vertical shape.
Why does my image look cropped after posting?
The platform trimmed it to fit its own ratio. Sizing to that ratio first keeps you in control of what stays in frame.
Which platforms and sizes are covered?
Common presets for the major platforms — square and portrait posts, thumbnails, headers and banners — so you can size one image for each without looking the numbers up.
Why does my image get cropped for some sizes?
Different platforms use different shapes. When the target shape doesn't match your image, part of it falls outside the frame, so centre the important bit.
Should I upload the biggest version I have?
Yes. Sizing down from a large original stays sharp; scaling a small image up to fit will look soft.