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Type a width, height, or percentage — the resized image downloads instantly. Aspect ratio stays locked by default so nothing gets stretched. JPG, PNG, WebP, GIF. Nothing leaves your browser.
Drop an image here
or click to browse — JPG, PNG, WebP, GIF
Upload, set the size, download. No account, no watermark, nothing installed.
Drop your image in
Drag it onto the tool or click to browse. JPG, PNG, WebP, GIF — doesn't matter. Nothing gets sent anywhere; the whole thing runs in your browser.
Enter the target size
Type a width and the height adjusts automatically (aspect ratio is locked by default). Or enter a percentage — 50% halves both dimensions. If you need a specific width AND height that don't match the original ratio, unlock the aspect ratio first. Just know it'll stretch.
Download
Click Resize. Same format comes back — JPG in, JPG out.
Usually one of four reasons.
Social platforms reject wrong sizes
Instagram crops anything that isn't 1080×1080 for feed posts. Open Graph images get mangled if they're not 1200×630. Twitter/X headers need 1500×500. Get the dimensions right once and stop guessing why things look off.
Phone photos are enormous
A photo from a modern phone is 4–10 MB and often 4000px+ wide. Nobody needs that for an email or a web page. Resize to 1200px wide and it drops to under 400 KB — same visual result, fraction of the size.
Serving a 3000px image in a 600px slot
One of the most common causes of slow page loads. The browser downloads the full 3000px file and shrinks it in CSS. Resize to the actual display size before uploading and you cut the download by 80%+.
Inconsistent thumbnail grids
Product listings and blog cards look broken when images are different sizes. Resize everything to the same dimensions — 400×300, 300×300, whatever your layout uses — before uploading.
Found a problem with Image Resizer? Let us know.
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