Skip to main content
CompressNConvert

Change dimensions

Image Resizer

Set exact pixel dimensions or scale by percentage while optionally preserving the original aspect ratio.

100% local

Drop one image here

JPG, PNG, WebP, or AVIF · up to 32 MB · adaptive 8–24 megapixel limit

Your image never leaves this browser

Private by design

Images stay in browser memory and are never uploaded by these tools.

Modern formats

Decode and export JPG, PNG, WebP, and AVIF using browser and WebAssembly codecs.

Keep your original

Re-encoding can alter metadata, animation, profiles, or quality, so verify every output.

Complete tool guide

Resize an image to the dimensions you actually need

Resizing changes the pixel width and height of an image. It is one of the most effective ways to reduce transfer size when a source is much larger than its display area.

Aspect ratio locking prevents accidental stretching. Unlock it only when exact dimensions are more important than preserving proportions.

Why use this tool?

  • Create exact website and marketplace dimensions.
  • Reduce oversized camera images.
  • Scale by percentage quickly.
  • Preserve proportions automatically.

Common use cases

  • Hero images and thumbnails.
  • Marketplace listings.
  • Presentation assets.
  • Email and profile images.

How to use it

  1. 1

    Select an image.

  2. 2

    Choose pixels or percentage.

  3. 3

    Set dimensions and aspect-ratio behavior.

  4. 4

    Resize and inspect the output.

Upscaling

Increasing pixel dimensions does not create true new detail and can soften the result.

Interpolation

The browser uses high-quality resampling, but fine text and line art should still be checked carefully.

Practical tips for better results

  • Start from the highest-quality original.
  • Avoid repeated resizing.
  • Match the destination’s recommended dimensions.
  • Compress after the final resize.

Frequently asked questions

Does resizing change file format?

No. The tool keeps the source format.

Why is aspect ratio locked?

It keeps circles round and prevents people or objects from appearing stretched.

Keep working

Related image studio

Continue with another focused tool from the same collection.

Image CompressorReduce JPG, PNG, WebP, or AVIF file size and compare quality.Image ConverterConvert between JPG, PNG, WebP, and AVIF with adjustable quality.Image CropperCrop to custom bounds or common aspect ratios with exact dimensions.Rotate and Flip ImageRotate in 90° steps or flip horizontally and vertically.