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Image Resizer

Resize your images with custom dimensions and optional aspect ratio preservation.

Step 1: Upload Image

Upload Image

Drag and drop your image here, or click to select

Supports JPG, PNG, WebP, and more

Resize Settings

New size: 800 × 600 px

Infinity% of original

About

  • • Custom width & height
  • • Aspect ratio preservation
  • • Browser-decodable image formats
  • • Canvas-based resizing

Set exact pixel dimensions with optional aspect locking

Image Resizer redraws one source image at the width and height you enter. With Maintain Aspect Ratio enabled, changing one dimension recalculates the other from the original proportions so circles and faces are not stretched.

Practical sizing jobs

  • •Create a smaller web image for a known content-column width.
  • •Make a square avatar by deliberately unlocking the aspect ratio.
  • •Prepare a thumbnail while retaining the original file separately.

How to use this tool

  1. 1.Upload an image up to 50 MB and note its detected pixel dimensions.
  2. 2.Leave aspect ratio enabled for proportional scaling, or disable it only when distortion is intentional.
  3. 3.Enter both output dimensions, resize, and inspect sharp edges and text before downloading.

Downscaling versus upscaling

  • Canvas performs the resampling in the browser and re-encodes with the source MIME type at a requested quality of 0.9.
  • Downscaling discards pixels and is useful for web delivery.
  • Upscaling invents intermediate pixels; it increases dimensions but cannot restore detail absent from the source.

Example: adapt a 3000 × 2000 photo for a website

Set width to 1200 with aspect ratio enabled. Height becomes 800, preserving the original 3:2 shape. A 1200 × 600 target would require unlocking the ratio and would visibly squash the photo; cropping is usually better for that target.

Resolution and print caveats

  • Pixel dimensions alone do not establish physical print size or print quality; DPI and viewing distance also matter.
  • Large upscales can look soft or pixelated.
  • The tool processes one image at a time and does not crop to fit a different aspect ratio.

Avoid stretched or blurry output

  • Unexpected shape: enable Maintain Aspect Ratio and change only one dimension.
  • Need an exact different ratio: crop first instead of stretching.
  • Browser struggles: reduce the requested dimensions or use a smaller source file.

Continue the workflow

Return to Image tools, or continue with a complementary tool:

Crop ImageChange composition or aspect ratio without stretching.Compress ImageTune encoding after dimensions are correct.Batch Resize ImagesApply a shared size workflow to multiple files.

Compare resizing with image-quality compression

Questions about this specific tool

What does Maintain Aspect Ratio do?

It calculates the other dimension from the original width-to-height ratio whenever you change width or height.

Will making an image larger improve it?

No. Upscaling adds pixels through interpolation but cannot recover detail that was not present in the source.

Should I resize or crop for a banner?

Crop when the target has a different aspect ratio. Resizing to a mismatched ratio stretches the picture.

Does this tool run in the browser?

Yes. The resize operation uses browser Canvas; the result then enters the download-result workflow when you download it.