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Resize & Compress Images Online
1Upload and resize
Fast, free and browser-based
Free Image Resizer to Resize Image Online
Cornerpen's image resizer helps you resize image files in a few simple steps. Upload a photo, choose a smaller size and download the result. You can resize image online free on your phone or computer, with no software to install.
Use this photo resizer when you need a smaller file for a job application, a lighter website image or dimensions that are easier to share. It accepts JPG, PNG and WebP files and saves the resized result as a JPEG.
Simple workflow
How to Resize Photo Online in 4 Easy Steps
Choose your size
Set a maximum width in pixels or scale the original dimensions by percentage.
Check the preview
Adjust JPEG quality and compare the resized result with the original file.
Download
Save the resized JPEG to your device and use it wherever you need it.
File-size help
How to Resize Image in KB
Exam portals, job forms and government websites often set limits such as 20 KB, 50 KB, 100 KB or 200 KB. Check the limit on your form first, then use the preview to work toward the size you need.
- Lower JPEG quality a little at a time and process the photo again.
- If the file is still too large, reduce the maximum width or percentage.
- Stop when the preview fits your limit so you keep as much detail as possible.
Resize Photo by Pixels or Percentage
Set a maximum width when you need a specific pixel limit, or choose a percentage for a quick proportional change. The resizer keeps the original width-to-height ratio, so the picture will not look stretched or squashed.
Common Photo Sizes for Websites and Social Media
These dimensions are useful starting points when you resize photo files. Platform recommendations can change, so check the latest guidance before publishing.
| Use | Suggested size |
|---|---|
| Instagram square post | 1080 x 1080 pixels |
| YouTube thumbnail | 1280 x 720 pixels |
| Facebook or link-share image | 1200 x 630 pixels |
| LinkedIn profile photo | 400 x 400 pixels |
| Website banner | 1920 x 1080 pixels |
Image Resize vs. Image Compression
Image resize changes the width and height of a picture. Compression lowers file size by reducing quality or removing extra data. Resizing often creates the biggest reduction, then a small quality adjustment can help you reach a lower KB range. This tool lets you use both controls together.
Tips to Resize Photos Without Losing Quality
- Start with the largest, clearest original available.
- Reduce the photo only as much as the form or website requires.
- Avoid enlarging a small image because it can look blurry.
- Lower quality gradually when you need a smaller KB size.
- Always compare the preview before downloading.
Photo Resizer Features
Adjustable JPEG quality
Maximum-width and percentage resizing
Side-by-side preview
Original and resized file sizes
Multiple-photo processing
Private browser-based processing
Why Choose This Resizer?
Large image suites such as iLoveIMG offer many utilities in one place. When you only need to resize photo files, Cornerpen keeps the process focused: upload, adjust, preview and download. There are no extra menus to work through, and your photos are processed in the browser rather than uploaded to our servers.
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Upload an image and get a smaller version in seconds. This free photo resizer is designed to make every resize clear, private and simple.
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