Image files are the heaviest part of most uploads — a modern phone photo is 4000+ pixels and several megabytes, while a forum avatar needs 256 pixels and a web banner under 200 KB. Resizing usually means installing software or trusting a website that uploads your photos to its servers.
This resizer works entirely in your browser using the canvas API: the image is loaded locally, scaled to your target dimensions, and re-exported as PNG or JPEG. Your photos never leave your device — suitable even for ID scans and private pictures.
How to Use This Tool
- Drop or select an image file.
- Enter the target width or height — the other dimension follows the aspect ratio automatically.
- Choose the output format (JPEG for photos, PNG for graphics with sharp edges).
- Download the resized image.
Frequently Asked Questions
Is my image uploaded to a server?
No. The file is read directly by your browser, resized on a local canvas, and saved from memory. You can verify this by loading the page, disconnecting from the internet, and resizing — it works offline.
Should I save as JPEG or PNG?
JPEG compresses photos far smaller at excellent quality but is lossy and blurs sharp edges slightly. PNG is lossless — ideal for screenshots, logos, and text — but much heavier for photographic content. When in doubt: photos → JPEG, graphics → PNG.
Why does enlarging an image look blurry?
Upscaling cannot invent detail that was never captured; the algorithm interpolates between existing pixels, producing softness. Resizing down always looks good; resizing up degrades — start from the largest original you have.