Use this free image resizer to resize any photo or graphic to exact dimensions for YouTube, Instagram, Twitter, Facebook and more. Choose from platform presets or enter custom width and height — everything processes in your browser with no file upload required.
Click to upload or drag & drop
PNG, JPG, WEBP, GIF
Every platform has its preferred image dimensions, and uploading the wrong size is one of those small things that quietly makes your content look less polished. YouTube thumbnail gets stretched. Instagram photo shows up with odd cropping. Website hero image loads slowly because it's three times larger than it needs to be. Getting the dimensions right before you upload solves all of that.
This tool resizes images in your browser to exact pixel dimensions. No upload to a server, no account needed. Set the width and height, drop in your image, and download the resized version ready to upload.
Step 1 — Enter your target dimensions. Type in the width and height in pixels. If you want to maintain the original aspect ratio, enable the 'lock ratio' option and only change one dimension — the other will calculate automatically.
Step 2 — Upload your image. Drag and drop your image file or browse to select it. The tool accepts JPEG, PNG and WebP. For best results, always start with the largest version of your image that you have.
Step 3 — Download the resized image. Once the resize is applied, download the new file. Check that it looks right before uploading — specifically that it's not stretched or squished due to a ratio mismatch.
Scaling an image up beyond its original resolution. Making an image larger than its original size doesn't add detail — it just stretches the existing pixels and the result looks blurry. Always resize down from a larger original, not up from a smaller one.
Changing both dimensions without maintaining the ratio. If you resize an image to different proportions than the original, it will look squished or stretched. Either lock the aspect ratio when resizing, or crop the image first to the target ratio before resizing.
Saving a PNG as JPEG when you need transparency. JPEG doesn't support transparent backgrounds. If your image has a transparent background, don't convert it to JPEG — the transparency will be replaced with a white or black background.
1280x720 pixels at a 16:9 ratio, saved as JPEG or PNG, under 2MB. This is YouTube's recommended thumbnail size. Higher resolution like 1920x1080 also works and looks sharper on 4K monitors.
Feed square: 1080x1080. Feed portrait (best for reach): 1080x1350. Feed landscape: 1080x566. Stories and Reels: 1080x1920. Profile photo: 320x320 (displayed at 110x110, but upload at 320 for crispness).
Resizing down maintains quality well — you're just removing pixels. Resizing up reduces quality because you're adding pixels that weren't in the original. Always start with the highest-resolution source file you have.
Resizing changes the overall dimensions while keeping all the content visible. Cropping cuts out a portion of the image to change its size or ratio. Often you need to crop to the right ratio first, then resize to the right pixel dimensions.
Uploading incorrectly sized images causes cropping, letterboxing and pixelation on social platforms. Each platform has specific recommended dimensions, and hitting them exactly ensures your images display at full quality without unwanted cropping or awkward black bars. It also keeps file sizes manageable for faster page loads.