Image Resizer

Resize multiple images in the browser with aspect ratio kept, no server upload.

Category: Image Tools

When to use?

Use it to shrink images to a suitable size before uploading to blogs, shops, social media, or work documents.

How to use

  • Select images.
  • Choose fit-to-max-size or specify width/height directly.
  • Set the output format and quality, then download.

Input Explanation

After selecting the source image, enter the max width/height for fit mode or the exact width/height for direct mode. JPG and WebP use a 1–100 quality value; PNG does not.

Calculation Basis

Fit mode shrinks within the entered box keeping aspect ratio without enlarging beyond the original. Direct mode redraws the image onto a canvas of the entered width/height.

Usage Examples

  • Resize before upload - Shrink original photos to a web-suitable size.
  • Unify thumbnails - Unify several photos to a consistent small size.
  • Optimize email attachments - Shrink large photos to a size good for email.

Examples

  • A 4000px-wide image set to max width 1920px → auto-shrunk to 1920px keeping ratio
  • Select several at once → all resized to the same max size

Cautions

  • Processing many images at once can take time depending on browser performance.
  • Extremely high-resolution large files may fail to convert due to browser image-decoding limits.

FAQ

Are images sent to a server?

No. It processes only in the browser with the File API and Canvas API.

Is the aspect ratio kept?

Yes. Set one of width or height and the other is auto-calculated to keep the original ratio.

Can I process several at once?

Yes. You can resize multiple images with the same settings at once.

Can I enlarge beyond the original?

You can, but adding pixels can reduce quality.

Related Tools

  • Image Compressor - Reduce image file size in the browser by adjusting quality and max size.
  • Image Format Converter - Convert PNG, JPG, and WebP images to each other in the browser.
  • Image Cropper - Enter pixel coordinates to crop just the area you need, in the browser.
  • Favicon Generator - Generate multiple favicon and app-icon PNG sizes from a source image.
  • Image Rotate / Flip - Rotate images in 90-degree steps or flip them horizontally/vertically.
  • Image Color Extractor - Analyze image pixels in the browser to extract the main color HEX codes.