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FormatLab

Resize Images by Pixels, Percentage, or Presets

Change image dimensions easily in your browser. Maintain aspect ratio, choose contain or cover fit, and export to JPG or PNG.

Runs in your browser. Files are never uploaded.
Choose files or drag and drop here

Supports .jpg, .jpeg, .png, .webp, image/jpeg, image/png, image/webp • 100% processed locally on your device

Whether preparing product photos for an online store, profile avatars for a forum, or banner images for a presentation, having the correct pixel dimensions is essential. Uploading oversized images slows down web pages, while incorrect aspect ratios cause awkward stretching.

This tool lets you scale image dimensions by exact pixels, percentage, or popular social presets with high-quality resampling right in your browser.

How to Resize an Image

1

Add Images

Select an image or drop it into the dropzone.

2

Set Target Dimensions

Enter your desired width or height. Keep Lock Aspect Ratio enabled to prevent distortion.

3

Download Resized Image

Click Resize and download your freshly scaled image immediately.

High Quality Downscaling in Modern Browsers

Simple single-step downscaling can sometimes introduce shimmering artifacts or aliasing on fine patterns. Our engine uses smooth bilinear resampling algorithms to ensure that scaled photos retain clear text and sharp contours.

Remember that downscaling eliminates pixels cleanly, but upscaling a small thumbnail cannot magically create new detail.

Practical Tips

  • For full HD displays, 1920 pixels on the long edge is standard.
  • For social media feeds, square images are typically 1080x1080 pixels.

Honest Limits

  • Enlarging low resolution images cannot restore lost photographic detail.

Frequently Asked Questions

Will resizing make my image blurry?

Downscaling to smaller dimensions keeps images crisp. Upscaling beyond the original resolution will inevitably appear softer.

How does locking aspect ratio help?

It guarantees that when you change the width, the height adjusts proportionally so subjects do not appear squished or stretched.

Does resizing reduce the file size?

Yes. Lowering pixel dimensions is one of the most effective ways to dramatically reduce image byte size.

Is my photo uploaded to a server?

No. All canvas transformations occur locally on your machine.

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