Image Resizer
Resize any image to exact pixel dimensions or scale it by a percentage, with the aspect ratio locked automatically. Runs fully in your browser — nothing is uploaded.
How to Use the Image Resizer
- Click "Select an Image" and choose a photo from your device.
- Pick "Resize by Pixels" for exact width/height, or "Resize by Percentage" to scale proportionally.
- In pixel mode, keep "Lock aspect ratio" checked so the other dimension updates automatically.
- Click "Resize" to render the new size, then "Download Result" to save it.
Why Use This Tool?
Does this tool upload my photos anywhere?
No. Resizing happens entirely inside your browser using the Canvas API — your image is decoded, redrawn at the new size, and re-encoded locally. It is never sent to a server, which means it's safe to use for private photos, screenshots, or documents.
What does "lock aspect ratio" do?
When enabled, changing the width automatically recalculates a proportional height (and vice versa), so your image never looks stretched or squashed. Uncheck it if you deliberately want a different width-to-height ratio.
Can I enlarge a small image?
Yes, you can scale up in percentage mode (up to 200%) or by typing larger pixel values. Keep in mind that enlarging a low-resolution image beyond its original size can make it look softer or blurrier, since no new detail is actually created.
What format is the resized image saved in?
The output downloads as a PNG by default, which preserves quality and transparency. If you need JPEG or WebP output specifically, use the Image Format Converter tool after resizing.