Duronto Tech - Free Online Tools
Image Tools

Image Resizer

Resize images to any dimension while maintaining aspect ratio.

.jpg .jpeg .png .webp .gif Max: 20 MB

Click to upload or drag and drop

Supported: JPG, JPEG, PNG, WEBP, GIF

How to Use Image Resizer

1

Upload a jpg, jpeg, png, webp or gif file of up to 20 MB using the drop zone or file picker.

2

Set the output width and height, or tick lock aspect ratio and enter only the width you want.

3

Click Resize and the image is resampled to the new dimensions on the server.

4

Download the resized file and confirm the pixel dimensions before you upload it to your site.

Features

Resize by exact width and height, by percentage, or by locking one side to the aspect ratio
Supports jpg, jpeg, png, webp and gif inputs up to 20 MB
Genuine pixel resampling, so the saved file is genuinely lighter
Percentage presets for common halving and thumbnail jobs
Runs on the server and works the same on mobile, tablet and desktop
Free with no account, no watermark and no batch limit

Frequently Asked Questions

Shrinking an image is very safe and normally looks indistinguishable from the original. Enlarging beyond the native resolution cannot create detail that was never captured, so it can look soft.
Up to 20 MB per file, which comfortably covers full-resolution files from high megapixel phone cameras and most DSLR RAW exports turned into images.
Yes, multiple files can be uploaded and resized together, which is ideal for producing a consistent set of thumbnails for a gallery or a product listing.
Resizing rebuilds the image, so incidental metadata is usually not carried over. If you specifically need to strip EXIF location and camera data, use the metadata remover tool instead.

Related Tools

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PNG to JPG

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JPG to WebP

Convert JPG images to modern WebP format for smaller file sizes.

PNG to WebP

Convert PNG images to WebP format with lossless or lossy compression.

WebP to JPG

Convert WebP images to widely supported JPG format.

WebP to PNG

Convert WebP images to PNG format preserving transparency.

About Image Resizer

A 6000-pixel photo from a modern camera weighs tens of megabytes and takes just as long to load. Nobody browsing your site is viewing it full-screen on a 27-inch monitor, so shipping that file to every visitor is pure waste. Resizing an image to the dimensions it will actually be displayed at is the easiest way to make a page feel dramatically faster without changing how it looks at all.

This resizer accepts jpg, jpeg, png, webp and gif files of up to 20 MB. Enter a target width and height, or lock the aspect ratio and give only one of them, and the image is scaled to fit. Percentage-based presets are there too, for the common case of halving a photo for a retina display or quartering it for a thumbnail grid.

Resizing is a real resample, not just a metadata trick, so the pixels are genuinely rebuilt at the new dimensions. That makes the result genuinely smaller rather than a large file wearing a small label. Keep the aspect ratio locked unless you deliberately want the image stretched, and note that enlarging a photo beyond its native resolution will not add real detail.

When to Use This Tool

  • Shrinking camera originals before they go into a blog post, gallery or product catalogue
  • Producing exact size variants for a responsive design, such as a 1200px hero and a 400px card thumbnail
  • Meeting the image dimension requirements of an avatar, banner, print-on-demand or marketplace listing
  • Reducing images to a manageable resolution for email newsletters, slide decks or PDF attachments