Image Resizer
Crop and resize images to the perfect size for every platform — in your browser.
Drop an image here, or click to browse
JPG, PNG, or WebP up to 25 MB. Processed in your browser — never uploaded.
This free image resizer crops and resizes your photos to the exact dimensions each social platform wants — without ever uploading them. Drop in a picture, pick a preset for Instagram, X (Twitter), Facebook, LinkedIn, Pinterest, or YouTube, and download a perfectly sized image in seconds. Need something specific? Enter any custom width and height and the tool handles the rest.
Posting the wrong size is one of the quickest ways to make good content look careless: feeds crop your subject awkwardly, stories add letterbox bars, and thumbnails turn blurry. By resizing to the right aspect ratio first, you control the framing instead of letting each app guess. The resizer uses a centered cover crop with high-quality smoothing, so your images fill the frame cleanly and stay sharp rather than stretched.
Best of all, this is a 100% private, browser-based image resizer. Your files are processed entirely on your own device using the canvas API — nothing is sent to a server, stored, or logged. That makes it perfect for resizing client assets, unreleased product shots, and any image you would rather not upload to a random website. Resize it here, then schedule it across every channel with PostJay.
Frequently asked questions
Are my images uploaded to a server?
No. Every step happens locally inside your browser using the HTML canvas. Your image is read straight from your device, resized in memory, and offered back to you as a download — it is never sent over the network, stored, or seen by us. You can even resize photos with the page open offline once it has loaded, which makes this safe for client work, screenshots, and anything confidential.
How does the cropping work?
We use a centered cover crop. Your photo is scaled up or down until it completely fills the target dimensions, then any overflow is trimmed evenly from the edges. This keeps the subject centered and avoids the stretched, squashed look you get from a simple stretch-to-fit. If you need a different framing, crop your image first and then run it through the resizer.
Which sizes can I export?
Pick from presets covering the most-used social formats — Instagram square, portrait, and story; X and YouTube landscape; Facebook and LinkedIn feed; and Pinterest pins — or enter any custom width and height you need. The result is exported as a high-quality PNG, with smoothing set to high so resized photos stay crisp.
Will resizing reduce the quality of my image?
Resizing always resamples pixels, but we use high-quality smoothing and a lossless PNG export to preserve as much detail as possible. For the sharpest results, start from the largest version of your image you have — scaling a small file up to a big format will look soft no matter which tool you use.
Now schedule it with PostJay
Plan, schedule, and auto-publish to every platform from one calendar. Free to start — no card required.
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