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Image sizing

Image Resizer

Resize JPG, PNG, and WebP images in the browser. Keep the aspect ratio locked by default, adjust dimensions, preview the result, and download the resized file without uploading it anywhere.

  • Free to use
  • No account
  • Browser processing

Upload image

or drag and drop an image here

JPG, PNG, and WebP files only

Resize JPG, PNG, or WebP images directly in the browser. Lock the aspect ratio by default, adjust dimensions, preview the result, and download the new file.

Preview and download

Upload an image to resize it and compare the result here.

Purpose-built workflow

Resize images to exact pixel dimensions

  • Exact dimensions
  • Aspect lock
  • Live preview
  1. InputChoose or drop an image
  2. RefineSet width, height, and aspect behavior
  3. ReviewCheck final dimensions and appearance
  4. FinishDownload correctly sized images

Image sizing

What does Image Resizer do?

Image resizing matters because many assets are published much larger than the layout actually needs. Oversized images waste bytes, slow pages down, and create unnecessary upload friction across websites, listings, and campaigns.

This resizer keeps the workflow practical by letting you control width and height, keep aspect ratio where needed, choose an output format, and download the final result after a quick preview.

Match image dimensions to real layout needs instead of uploading oversized originals.
Prepare assets for social platforms, ad placements, and responsive page sections.
Control the final output format while resizing in one step.

Common use cases

Sizing social share images
Preparing marketplace product shots
Creating lighter blog and landing page media

Step-by-step

How to use this tool

  1. 1

    Add content to Image Resizer

    Add the image or images you want to process.

  2. 2

    Configure the result

    Choose the output, dimensions, or editing options you need.

  3. 3

    Review and export

    Preview the result, then download the new image file.

Tips for a better result

  • Start with a representative sample before running a large image resizer workflow.
  • Keep the original input until you have checked the downloaded or copied result.
  • Review quality, compatibility, and output size before publishing or sharing the result.

Keep working

Related workflows

All Image Tools Convert, compress, resize, and optimize images directly in the browser.Image Compressor Reduce image file size while keeping quality suitable for web and mobile.Image Format Converter Convert batches of PNG, JPEG, and WebP files into efficient web formats.Smart Image Cropper Find a high-interest crop, apply common aspect ratios, preview it, and export locally.Metadata Stripper Re-encode images to remove EXIF location, camera, and timestamp metadata.

Learn from primary sources

Trusted references

Use these standards and official guides when you need deeper technical detail.

Image performance guidance (opens in a new tab)Google's web.dev guidance for sizing and delivering efficient images.Canvas API reference (opens in a new tab)MDN's reference for browser-based image drawing and processing.

FAQ

Common questions

Everything you need to know before processing your files.

Resizing before upload reduces wasted pixels and often leads to smaller files, faster loading, and cleaner layout control.

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PNG to JPG

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JPG to WebP

Convert JPG files into efficient WebP images with a browser-first workflow.

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Privacy and measurement

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