Resize Image

Scale by pixels or percent with optional aspect-ratio lock — private and on-device.

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Resize Image Online — Scale by Pixels or Percent Free

Change image width and height by exact pixels or percentage while locking aspect ratio. Ideal for web, print, and social specs. NeedAnyTool processes files entirely on-device — nothing is uploaded to a server.

Related tools: Crop image · Compress image · Social media sizes · Change DPI

NeedAnyTool processes files entirely on-device — nothing is uploaded to a server.

How it works

Upload your image
Select any supported image. Original dimensions display immediately after load.
Enter new width or height
Type target pixels or choose a percentage scale. Enable aspect lock to avoid stretching.
Choose resampling behavior
Preview how the scaled image looks — downscaling smooths detail; upscaling may soften edges.
Verify dimensions
Check the output width and height match your platform or print requirement.
Download resized image
Save the new file at the exact pixel size you specified.

Why use this tool

Downscaling 4K photos for blog featured images
Creating thumbnail versions for gallery grids
Matching pixel dimensions required by ad platforms
Preparing images at exact print dimensions before ordering

Frequently asked questions

Are my files uploaded to a server?: No. All image processing runs entirely in your browser on your device. Your files are never uploaded, stored, or transmitted to any server.
Can I resize without distorting the image?: Yes. Keep aspect ratio locked so width and height scale proportionally and the image does not stretch.
Is it better to resize or crop for social media?: Resize when you need a specific pixel size but want the full frame. Crop when the aspect ratio must change — for example, a landscape photo into a square post.
Does resizing reduce file size?: Usually yes, because fewer pixels mean less data. For maximum savings, combine resize with the Compress tool.
Can I upscale a small image to high resolution?: You can increase dimensions, but upscaling cannot invent real detail. The result may look soft or pixelated compared to a native high-resolution source.
What is the difference between resizing and changing DPI?: Resizing changes pixel dimensions (what displays on screen). DPI changes metadata about print density without necessarily changing pixels — use both tools when preparing for print.
Can I resize to exact pixels for Google Display ads?: Yes. Enter the required width and height in pixels, such as 300×250 or 728×90, with aspect lock off only if the spec demands it.

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Resize Image Online — Scale by Pixels or Percent Free

NeedAnyTool processes files entirely on-device — nothing is uploaded to a server.

How it works

Upload your image

Select any supported image. Original dimensions display immediately after load.

Enter new width or height

Type target pixels or choose a percentage scale. Enable aspect lock to avoid stretching.

Choose resampling behavior

Preview how the scaled image looks — downscaling smooths detail; upscaling may soften edges.

Verify dimensions

Check the output width and height match your platform or print requirement.

Download resized image

Save the new file at the exact pixel size you specified.

Frequently asked questions

Are my files uploaded to a server?

No. All image processing runs entirely in your browser on your device. Your files are never uploaded, stored, or transmitted to any server.

Can I resize without distorting the image?

Yes. Keep aspect ratio locked so width and height scale proportionally and the image does not stretch.

Is it better to resize or crop for social media?

Resize when you need a specific pixel size but want the full frame. Crop when the aspect ratio must change — for example, a landscape photo into a square post.

Does resizing reduce file size?

Usually yes, because fewer pixels mean less data. For maximum savings, combine resize with the Compress tool.

Can I upscale a small image to high resolution?

You can increase dimensions, but upscaling cannot invent real detail. The result may look soft or pixelated compared to a native high-resolution source.

What is the difference between resizing and changing DPI?

Resizing changes pixel dimensions (what displays on screen). DPI changes metadata about print density without necessarily changing pixels — use both tools when preparing for print.

Can I resize to exact pixels for Google Display ads?

Yes. Enter the required width and height in pixels, such as 300×250 or 728×90, with aspect lock off only if the spec demands it.