Free Online Image Resizer Tool

An image resizer redraws a photo at new pixel dimensions, optionally locking the aspect ratio so it never looks stretched.

Your data is processed entirely in your browser and never sent to any server.

Instant results 100% private No signup needed

How to Use This Tool

  1. Upload an image — its native width and height pre-fill the fields.
  2. Type a new Width or Height in pixels.
  3. Keep Lock aspect ratio ticked to scale proportionally, or untick for exact dimensions.
  4. Click Resize to redraw the image on the canvas.
  5. Download the result as a PNG.

What Is an Image Resizer?

Resizing changes how many pixels an image contains. Shrinking (downsampling) averages neighbouring pixels and almost always looks clean; enlarging (upsampling) invents pixels by interpolation and can soften or pixelate the result. This tool uses the Canvas API's high-quality smoothing for the best possible resample.

The aspect-ratio lock keeps width and height proportional — type one dimension and the other follows the original ratio, so a 1600×900 photo stays 16:9 at any size. Unlock it to force exact dimensions when a layout demands a specific box, accepting some distortion.

Output is written as a lossless PNG so the resized image carries no extra compression artifacts. The whole operation happens on a canvas in your browser; the source file is never sent anywhere, which keeps screenshots and private photos on your machine.

Frequently Asked Questions

Will resizing reduce image quality?
Enlarging can cause pixelation; shrinking usually preserves quality. Use appropriate dimensions for your output to avoid quality loss.
Can I maintain aspect ratio?
Yes. Lock aspect ratio to resize proportionally, or enter custom width and height for specific dimensions.
What's the maximum image size?
Limits depend on your device memory. Most browsers handle common resolutions up to 4K or higher with ease.

Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.

Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.

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