# Image Resizer Resize any image to exact pixels or a percentage, lock the aspect ratio, and export as JPEG, PNG, or WebP — right in your browser. Your photo is never uploaded; it never leaves your device. Drop an image here, or **click to choose** ## How resizing works in the browser The image is drawn onto an HTML `` at your chosen dimensions using `drawImage()`, then read back out as a compressed file with `canvas.toBlob()`. Because the canvas and the file both live in memory, **the picture never touches a server** — the whole thing is client‑side JavaScript. ### Aspect ratio With *Lock aspect ratio* on, changing the width recomputes the height (and vice‑versa) from the original ratio, so nothing stretches. Turn it off to squash or stretch deliberately. ### Downscaling quality & format The browser smooths as it scales (bilinear/bicubic sampling). Big reductions look best done in one step, which is what this does. **JPEG** and **WebP** are lossy — the quality slider trades file size against fidelity; WebP is typically 25–35% smaller than JPEG at similar quality. **PNG** is lossless (no quality slider) and keeps transparency; use it for logos and screenshots, JPEG/WebP for photos. ### Privacy Files are read with the local `FileReader`/object‑URL APIs and processed in memory. Nothing is uploaded, stored, or logged. --- *Source: [ocxly.com/image-resizer.html](https://ocxly.com/image-resizer.html) — OCXLY, free 100% client-side privacy-first tools. Free online image resizer: change any image to exact pixels or a percentage, lock the aspect ratio, and export as JPEG, PNG, or WebP. 100% client-side — your photo is never uploaded.*