About this tool
An image resizer changes image dimensions by exact pixels or by a percentage of the original size. Lock the aspect ratio to avoid stretching, or use a prepared size for common social media layouts such as an Instagram post, story, or YouTube thumbnail. Output can be PNG, JPG, or WebP.
Resizing runs completely in your browser, so files are never uploaded and nothing remains after the tab closes. When making an image substantially smaller, high-quality step-down resampling reduces it in stages to help preserve sharpness. Add a batch of images, apply the chosen settings, and download all completed files together as a ZIP.
How to use the Image Resizer
- 1Add the image files whose pixel dimensions need changing.
- 2Select pixel or percent mode and enter the new size.
- 3Lock aspect ratio unless you intentionally want different proportions.
- 4Choose a social preset or set PNG, JPG, or WebP output.
- 5Resize the batch and download separate images or one ZIP.
Features
Pixel percent sizing
Set exact width and height values or scale from the original by percentage.
Aspect ratio lock
Keep width and height proportional while changing either dimension.
Social size presets
Apply prepared dimensions for posts, stories, thumbnails, and similar common layouts.
Step-down resampling
Downsize in high-quality stages to keep reduced images clearer and sharper.
Multi-image ZIP export
Resize a group with shared settings and download every result together.
Frequently asked questions
How do I resize without stretching the picture?
Turn on the aspect ratio lock. Changing one dimension then updates the other to preserve the original proportions.
Should I resize by pixels or percent?
Use pixels when you need an exact output dimension. Use percent when every image should scale relative to its own original size.
Why use step-down resampling for smaller images?
Reducing a large image in stages can preserve edge detail better than a single large downscale operation.
Can I resize several images into one ZIP?
Yes. Add a batch, process it with the selected settings, and download all results in a ZIP archive.
Do selected images leave my device?
No. The browser performs resizing and file creation locally, then clears the working data when the tab closes.