Free Image Resizer — Resize Photos by Pixels

How to Use the Image Resizer

Click the upload area, or drag and drop a JPG, PNG or WebP file onto it.
Enter your target width and/or height in pixels.
Leave "Lock aspect ratio" checked to keep proportions consistent, or uncheck it for an exact custom size.
Click "Resize image" to generate the result.
Click "Download resized image" to save it to your device.

Benefits

Get images to the exact pixel dimensions a website, form or platform requires.
Avoid stretched or squashed images with aspect ratio locking.
No software installation or account required.
Works entirely in your browser, so your original file stays private.

Features

Drag-and-drop upload with a mobile-friendly file picker.
Manual width and height inputs in pixels.
Aspect ratio lock that updates the paired dimension automatically.
Side-by-side original vs. resized preview.
One-click download and reset.

Supported Formats

JPG, JPEG, PNG and WebP.

Privacy & Security

This tool resizes images using your browser's built-in Canvas API. Your image is never uploaded to a Napizo server — all processing happens on your own device. Read the full Privacy Policy for details.

Frequently Asked Questions

Will resizing distort my image?+

Not if "Lock aspect ratio" stays checked — changing one dimension will automatically adjust the other to keep proportions correct.

Can I make an image larger than the original?+

Yes, though enlarging an image beyond its original size can make it look softer, since no new detail is created.

What's the maximum size I can resize to?+

Width and height are each limited to 10,000 pixels to keep processing fast and reliable in the browser.

Is the image resizer free to use?+

Yes — resize unlimited images with no sign-up and no watermarks.

Are my images uploaded anywhere?+

No. Resizing happens locally in your browser — your images are never uploaded to a Napizo server.

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Image Resizer