Image Resizer

Image Resizer is a browser-based tool that changes an image's pixel dimensions, crops it to a new shape, and re-compresses it to a smaller file, all without an internet round-trip. When you drop a JPG, PNG or WebP file onto the page, it is decoded straight to an HTML canvas by your browser's own image pipeline. Nothing is uploaded, nothing is stored remotely, and the file never leaves your device, which is why the tool keeps working even after you go offline once the page has loaded. You can type an exact width and height in pixels, or click a preset sized for a real destination: Instagram square (1080x1080), portrait (1080x1350), story (1080x1920), an X/Twitter header, a YouTube thumbnail (1280x720), or common print sizes. A lock-aspect-ratio toggle scales width and height together so faces and logos never stretch; switch it off when you deliberately need an exact odd dimension. When your target shape differs from the source, crop mode fills the frame and lets you drag the visible area into place instead of squashing the subject, so a landscape photo becomes a clean square by trimming edges rather than distorting them. At export you choose the format and a quality slider, and the tool shows the estimated output file size before you download, so you can nudge quality down until the image slips under a 2MB avatar cap or an email attachment limit. WebP gives the smallest files at good fidelity, JPG maximizes compatibility with older apps and email, and PNG preserves lossless edges and transparency. Typical jobs: shrinking a 6000px phone photo to a 1600px web hero, standardizing a batch of product shots to identical dimensions for a shop, or preparing a print-ready file. Two habits pay off: downscale rather than upscale, because enlarging invents pixels and softens detail; and keep JPG or WebP around 75 to 85 percent quality, where the file shrinks sharply but the eye rarely notices the loss.