Image Resizer

How to resize an image

Choose your picture, type the width you want, and save. If “keep the original shape” is ticked, the height follows automatically so nothing is squashed or stretched.

If you need an exact width and height and do not mind the picture being stretched, untick that box and type both.

Which size should I choose?

• 1920 px wide — a full screen photograph, still good quality.
• 1280 px wide — comfortable for email or a website page.
• 800 px wide — small and quick to send.
• 50% or 25% — simply half or a quarter of what you started with.

If a form or a website has told you the maximum size in megabytes rather than pixels, reduce the width first, and then lower the quality until the saved size shown underneath is small enough.

Social media image sizes

The dropdown holds the sizes each network currently recommends, so you do not have to look them up. Instagram square posts are 1080 by 1080, portrait posts 1080 by 1350, and stories and reels 1080 by 1920. Facebook square posts are 1080 by 1080, landscape posts 1200 by 630, and cover photos 851 by 315. LinkedIn posts are 1200 by 627 and profile banners 1584 by 396. On X, posts are 1600 by 900 and headers 1500 by 500. YouTube thumbnails are 1280 by 720 and channel banners 2560 by 1440. Pinterest pins are 1000 by 1500 and TikTok videos 1080 by 1920.

These figures were checked against published guidance on 20th September 2026. The networks do revise them from time to time, so if a size matters a great deal, it is worth confirming with the network itself.

When the new shape is different

A photograph is usually a rectangle, and a square post is not. So when the shape you have asked for does not match the shape you started with, you are offered three choices.

• Fill it and trim the edges. The picture fills the whole space and the excess is trimmed evenly from either side. This is the default, and it is almost always what you want, because nothing is distorted.
• Show all of it, with bars. The whole picture is kept and white bars fill the space left over. Useful when nothing can be cut off.
• Stretch it to fit. The picture is pulled out of shape to fill the space exactly. It is there because occasionally somebody needs it, but it will make faces look wrong.

Which format should I save as?

Leaving it as the original is usually right. Beyond that, JPEG suits photographs and gives the smallest file. PNG keeps see-through backgrounds and sharp edges, which suits logos and screenshots, but the file is larger. WebP is smaller again and works in every current browser, although some older programs will not open it.

The quality setting applies to JPEG and WebP only. Around 85 is a sensible balance. Below about 60 you will start to see the picture break up.

Why nothing is uploaded

Most resizing websites send your picture to their computers, do the work there, and send it back. That means your photograph sits on somebody else’s machine, at least for a while.

This page does the work inside your own browser instead, using something your device already has. Your picture never leaves it. You can prove that to yourself: once the page has loaded, turn off your internet connection, and it will still resize perfectly well.

What this page cannot do

It resizes one picture at a time. It does not yet convert between one format and another beyond the choice above, and it cannot open HEIC files, which is the format iPhones often use. If you have a HEIC photograph, open it on your iPhone, choose Share, and send it to yourself by email or save a copy as JPEG first.

Very large pictures, above roughly forty megapixels, may fail on a mobile telephone because the browser runs out of room. A computer will usually manage them.