Social media image resizer

There is no one answer, which is the awkward part. A portrait post on Instagram is 1080 × 1350, Facebook's own feed size is 1440 × 1800, a Pin is 1000 × 1500 and TikTok is 1080 × 1920. If you only want to make one picture, a square at 1080 × 1080 works passably everywhere. Otherwise tick the places you actually post to and this page makes all of them from the one photo.

Profile pictures are small squares and they nearly agree: 320 × 320 on Instagram, 400 × 400 on X, 800 × 800 on LinkedIn. Banners do not agree at all — 1584 × 396 on LinkedIn, 1500 × 500 on X, 2560 × 1440 on YouTube. All of them are in the picker, and the six sizes an app shows in a circle are previewed as circles here, so you can see what the round crop takes off before you upload it.

Crop to fill enlarges the photo until it covers the whole size and throws away whatever hangs over the edges. Nothing is squashed, but the edges are gone — that is what the box on the preview is for: drag it over the part that matters. Keep it whole shrinks the photo until all of it fits and fills the space left over with a blur of the photo, white or black. Use crop to fill for a photograph, and keep it whole when you cannot afford to lose an edge, like a logo, a flyer or a menu.

A little, and only if you save as JPG or WebP. Each size is a new picture: your original is drawn at the new pixel size and saved again, and both of those formats throw away some detail every time they are written. PNG throws away nothing. The quality control decides how hard the file is squeezed — lower means a smaller file and a softer picture. Saving again also drops what the camera wrote into the file, like the date and the place; the rotation is the exception, because it is applied to the pixels before anything else.

JPG for photographs. PNG for a logo, flat colour or anything with small text, because it keeps edges sharp instead of smudging them. WebP is smaller than either at the same quality and every big platform takes it, but some older phone galleries and desktop programs still will not open it. 23 of these sizes have a file limit their platform publishes, and this page squeezes the file down until it fits — the tightest is the YouTube Video thumbnail at 2 MB. If even the lowest quality cannot get under it, the size says so instead of handing you a file that will be refused.

It marks the part of that size the app leaves alone — eight of the sizes here have one: Instagram Story, Instagram Reels picture, Facebook Page cover photo, Facebook Story, LinkedIn Profile banner, X Header, Pinterest Idea Pin and YouTube Channel banner. Everything outside the dashes can end up under a caption, a button, a profile picture or a second crop the app makes on another screen, so your price, your phone number and your logo belong inside. Each mark is worked out from what that platform publishes about that size, and the line under the preview says what it means.

Most of them, and the page names the ones that are not. TikTok publishes no pixel size for a photo post or a profile picture, and YouTube publishes none for a channel picture, so those three are ours. X's profile and header figures are X's published numbers at second hand, because its help page will not open to anything but a real browser. Everything else was read off the platform's own page on September 5, 2026, and those pages are linked under the sizes.

Not here. It uses your browser's own decoder and Safari is the only one that reads HEIC. Our free HEIC to JPG converter opens them in any browser and gives you a JPG you can bring straight back. To stop making them at all, open Settings on your iPhone, then Camera, then Formats, and choose “Most Compatible” so new photos are saved as JPG.

It is free, with no account and no limit on how many pictures you resize. Nothing is uploaded: your browser opens the file, resizes it and hands the results back to you, so the picture never leaves your device, we never see it, and nothing about it is stored or sent anywhere.