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Image Resizer
Resize images to exact pixel dimensions with aspect ratio lock and PNG, JPEG, or WebP output.
Drag and drop an image here, or
Supports JPG, PNG, GIF, and WebP
How to Use
- Drop an image or click browse to select one.
- Enter the new width and height, or pick a preset.
- Choose an output format.
- Click Resize image, then download the result.
Example
- A 4000×3000 photo resized to 1200×900 is ideal for a blog header.
- The Thumbnail preset (320×320) is a good size for gallery grids.
- Keep PNG if the image has text or logos that need sharp edges.
Frequently Asked Questions
Will resizing reduce image quality?
Scaling down generally looks fine. Scaling up beyond the original size makes the image softer because no new detail is created.
Which output format should I choose?
PNG keeps sharp edges and supports transparency. JPEG produces smaller photos. WebP usually gives the smallest files with good quality.
Are my images uploaded?
No. Resizing runs entirely in your browser using the Canvas API.
What does locking the aspect ratio do?
With the ratio locked, changing one dimension automatically updates the other so the image is not stretched.