Apchukso ~/resize● No upload · Batch resizing
From simply shrinking photos to Instagram posts, YouTube thumbnails and more. No app to install, it works on your phone, and it resizes a whole batch at once.
It's a tool built to take the hassle out of every platform wanting a different size: your head gets cut off on Instagram, your YouTube thumbnail looks blurry, or a cover image has to match a platform's specs. Pick where the photo is going, and it's instantly made in the right size.
If it's fine to lose a little around the edges, as with landscapes or portraits, Fill gives a clean result. You can move the crop with the horizontal and vertical sliders. When nothing can be cut off, as with product photos or images with text, choose padding. The extra space is filled with white by default, and you can switch it to black or a blurred copy of the photo.
These values were checked directly against each service's official help pages. Blogs still pass around outdated rules like "YouTube thumbnails: 1280×720, 2MB" and "4:5 is the tallest Instagram portrait." Specs can change, so double-check the official guidance before posting somewhere important.
| Category | Use | Size | Notes |
|---|---|---|---|
| Square | 1080×1080 | 1:1 | |
| Portrait 3:4 (new) | 1080×1440 | 3:4 (tallest portrait) | |
| Portrait 4:5 | 1080×1350 | 4:5 | |
| Landscape | 1080×566 | 1.91:1 | |
| Stories & Reels | 1080×1920 | 9:16 | |
| YouTube | Thumbnail (desktop upload) | 3840×2160 | 16:9, up to 50MB on desktop |
| YouTube | Thumbnail (mobile app) | 1280×720 | App upload, 2MB max |
| YouTube | Channel banner | 2560×1440 | 6MB max, safe area 1235×338 |
| Other social media | Facebook link image | 1200×630 | 1.91:1 |
| Other social media | Facebook cover | 851×315 | |
| Other social media | X header | 1500×500 | 3:1 |
| Other social media | X profile | 400×400 | 2MB max |
Q. What's the difference between Fill and padding?
Fill covers the whole target size with the photo and crops whatever spills over. Padding keeps the entire photo and fills the leftover space with white, black, or a blurred copy of the same photo. For photos that mustn't be cropped, like product shots, padding is the safe choice.
Q. Can I resize multiple photos to the same size at once?
Yes. Add several at once and they're all resized to the same size. Then grab them in one go with the "Download all as ZIP" button.
Q. Will a small photo get sharper if I make it bigger?
No. Making a photo bigger than the original can make it blurrier the more you stretch it. We flag those photos on their result cards.
Q. Are Instagram portrait photos 4:5 or 3:4?
According to Instagram's official guidance, you can now post portrait photos up to 3:4 (1080×1440). The old maximum, 4:5 (1080×1350), still works too.
Q. Aren't YouTube thumbnails 1280×720?
YouTube's official guidance now recommends 3840×2160, and you can upload up to 50MB from a computer. Uploads from the mobile app still have a 2MB limit, so there's also a separate 1280×720, under-2MB button.
Q. Does it work on my phone? Do I need to install an app?
It works right in your phone's browser, no app needed. On both Galaxy and iPhone, just pick photos from your gallery.
Q. Are pixels and file size (KB) different things?
They're different. Pixels are the width and height, while KB is how much space the file takes up. Shrinking the dimensions usually shrinks the file too, but if it has to be under a set size, follow up with "Fit a target size" in Compress image.
Q. Are my photos uploaded to a server?
No. Your photos are processed only inside the browser you're using and are never sent anywhere.