Resize images instantly

Why resize images?

Photos from a modern smartphone are often 4000×3000 pixels — far larger than anything a website, email, or social media post needs to display. A full-resolution photo can be 5–12 MB; the same image resized to 1200 pixels wide and exported at 90% quality is typically 100–300 KB — a 95%+ reduction with no visible quality loss at display size.

Resizing is also necessary for consistency: profile photos, product images, banner ads, and social media posts all have specific dimension requirements. Getting them right the first time saves time and avoids awkward crops or stretching by third-party platforms.

How to resize images online

1. 1

   Set your target size

   Choose 'By pixels' to set an exact width and height, or 'By percentage' to scale proportionally (e.g. 50% = half the original size).

2. 2

   Pick your output format

   Keep the same format or convert to JPG, PNG, or WebP. For JPG and WebP, set the quality level — 90% is a good default.

3. 3

   Drop your images

   Drag and drop up to 10 images onto the dropzone. Resizing runs locally in your browser — nothing is uploaded.

4. 4

   Download your resized images

   Save each file individually or click Download All to get a ZIP archive with all resized images.

Your images never leave your device

Most online image resizers upload your photos to a remote server, resize them there, then send them back. Your images — personal photos, client work, confidential documents — pass through infrastructure you know nothing about and may be retained for days or weeks.

This tool works entirely inside your browser tab using the standard HTML5 Canvas API. No JavaScript library is needed — the browser handles the resize directly. No file ever leaves your device. Close the tab and everything is gone from memory.

Resize by pixels vs. resize by percentage

By pixels: Set an exact target width and/or height. With aspect ratio locked, enter just one dimension and the other is calculated automatically. Useful when you need to hit a specific pixel specification — a 1200×628 OG image, a 400×400 profile photo, a 300×250 ad banner.

By percentage: Scale the image to a fraction of its original size. 50% gives you exactly half the width and half the height (one quarter the pixel count). Great for quickly creating thumbnails or reducing a batch of images to the same relative scale without needing to know their original dimensions.

Common image size requirements