Image Resizer — Resize Images Online Free

Need to resize an image online for free? This tool lets you resize any photo to an exact width and height, or by percentage, right in your web browser - no software to install, no account to create, and nothing uploaded to a server. You stay in full control of the dimensions and the final file.

Have you ever needed a picture to fit a precise size but worried about losing the proportions? You can turn on lock aspect ratio so your image stays perfectly proportioned as you change the dimensions, which prevents the stretched or squashed look that happens when width and height get out of sync. When you genuinely need a specific custom size, simply turn the lock off and set the exact width and height you want. Prefer to scale rather than set fixed numbers? Switch to percentage mode and shrink or enlarge the whole photo while keeping everything in proportion.

It also includes one-click social-media presets, so you can instantly resize a photo for Instagram (square, portrait, or story), Facebook, X/Twitter, LinkedIn, a YouTube thumbnail, or Pinterest. Pick a preset and the correct dimensions are filled in for you - no more hunting around for what size each platform wants or doing the math yourself. This is handy whether you are preparing a profile picture, a feed post, or a banner that has to fit a strict frame.

Because the entire process runs 100% in your browser, your images never leave your device. Nothing is uploaded to a server, which keeps your photos private and makes the resizing fast even when you have several to do. When you are happy with the result, download your resized image as a PNG or a JPG and use it wherever you need it.