About this tool
Every social platform crops your image to its own exact pixel size — an Instagram square post wants 1080×1080, a YouTube thumbnail wants 1280×720, a LinkedIn banner wants 1584×396 — and if you upload something else, the platform crops it for you, usually cutting off exactly the part you cared about. This tool flips that around: pick the platform preset you are posting to, drop your image, drag the locked-ratio frame to the part you want to keep, optionally zoom in for a tighter crop, and export a file that is already the platform's exact target size, ready to upload as-is.
Unlike a free-form crop, the selection frame here is always locked to the chosen preset's aspect ratio — you can move it around and resize it with the zoom control, but you cannot distort its proportions, so whatever you export will fit the platform's slot cleanly. Under the hood the crop and the resize happen in a single canvas draw: the selected region is read straight out of the source image and scaled to the exact target width and height in one step, so there is no separate blurry resampling pass. If your selection is smaller than the target (a small source photo, or a tight zoom), the tool tells you before you download, since scaling up a low-resolution crop will always look softer than the original — everything runs locally in your browser and the file is never uploaded anywhere.
Frequently asked questions
Do these exact pixel dimensions always match what the platform requires?
These are current, commonly-cited best-practice dimensions as of when this tool was built, but social media platforms occasionally update their recommended/required image sizes without much notice. For anything mission-critical (a paid ad campaign, a brand launch), it's worth double-checking the platform's own current official documentation before finalizing, rather than relying solely on any third-party tool's preset list — including this one.
What happens if my selected crop area is smaller than the target size?
It gets scaled UP to exactly match the target pixel size, and the tool warns you clearly when this is happening, since upscaling beyond an image's native resolution always introduces some softness/blur — there's no way around this without more source pixel data than the original photo contains. For the sharpest result, start with a source photo whose relevant region is already at least as large as your target preset.