Social Media Image Resizer

Why social platforms need specific image sizes

Every social network crops, scales and compresses the images you post to fit its own layout. If you upload a picture at the wrong aspect ratio, the platform decides what to keep — and it rarely keeps the part you cared about. Heads get cut off in a Facebook cover, a YouTube thumbnail turns blurry because it was scaled up from something tiny, an Instagram story leaves ugly bars top and bottom.

Sizing an image before you post puts you back in control. You decide the crop, you decide what stays sharp, and the platform receives exactly what it expects — so it shows your image as-is instead of mangling it. That is what this tool does: you pick the target platform and format, and it produces a file at the precise pixel dimensions that network uses.

It runs entirely in your browser. The image is drawn onto an HTML canvas at the chosen size and re-encoded locally, so nothing is uploaded and there is no waiting on a server. You can resize private campaign assets or unreleased client work with the confidence that the file never leaves your device.

The key 2026 dimensions

These are the sizes the tool exports. They reflect what the major platforms expect in 2026:

Notice how many placements share a ratio — square (1:1), portrait (4:5), vertical (9:16) and widescreen (16:9) cover most of them. Once you understand the ratio a placement wants, the exact pixel count is just a matter of resolution. For a custom size that isn't one of these social presets, the general-purpose image resizer lets you type any width and height.

How to use it

1. Choose an image by clicking the drop zone or dragging a file onto it. JPEG, PNG and WebP all work.
2. Pick a platform size. The presets are grouped by network and each one shows its exact dimensions.
3. Choose how to fit — crop to fill to cover the frame, or fit to letterbox the whole image on a background color.
4. If you picked crop to fill on an image that does not match the ratio, reposition the crop with the horizontal and vertical sliders so the important part stays in frame.
5. Pick a format (PNG for crisp graphics and transparency, JPEG for smaller photos) and, for JPEG, set the quality.
6. Check the live preview, then hit Download. Want the same image for another network? Pick a different preset and download again.

Crop to fill vs fit

The two fit modes solve different problems.

Crop to fill scales your image up until it covers the entire target frame, then trims whatever spills over the edges. The result has no empty space and looks native to the platform, which is almost always what you want for posts, thumbnails and stories. The trade-off is that some of the image is cut — so if you have a tall photo going into a wide frame, use the reposition sliders to keep the subject visible.

Fit does the opposite: it scales the whole image down until it sits inside the frame and fills the leftover space with a background color you choose. Nothing is cropped, which is useful for logos, screenshots or product shots where every edge matters. The cost is visible padding — pick a background that matches your brand or the image so the bars look intentional rather than accidental.

Quality and format tips

• Start from the largest source you have. Scaling a small image up to a 2560 × 1440 channel art will look soft because there is no extra detail to draw on. Resizing down always stays sharp.
• Use PNG for graphics, JPEG for photos. PNG keeps text, logos and flat color crisp and supports transparency; JPEG produces much smaller files for photographic content.
• Mind transparency when saving as JPEG. JPEG has no alpha channel, so transparent areas are filled with your chosen background color — switch to PNG if you need to keep a transparent background.
• Don't crush the quality slider. Around 85–90% JPEG quality is usually indistinguishable from the original while keeping files small. Going much lower introduces visible artifacts, especially in skies and gradients — if you need to hit a specific file-size budget, run the export through the image compressor instead.
• Export per placement, not once. A single 1080 × 1080 file will be re-cropped awkwardly if you reuse it as a story. Spend the extra few seconds to export each placement at its real ratio.

Privacy: nothing leaves your device

Most online resizers upload your file to a server, process it there and hand back a download — which means your image, and whatever is in it, passed through someone else's machine. This tool never does that. The resizing runs in JavaScript on your own computer using the browser's canvas, so the picture stays local from start to finish.

That matters for marketers handling unreleased campaigns, agencies working with client assets under NDA, and anyone who would rather not feed their photos into a third party. You can resize as many images as you like, for as many platforms as you like, with no account, no upload and no limit — all of it free, and all of it private.