Will aspect lock crop?

Lock adjusts the paired dimension to maintain ratio—it does not crop unless you enter mismatched forced sizes.

Which format should I export?

JPEG/WebP for photos; PNG for graphics needing transparency.

Can I resize to exact social media sizes?

Yes. Enter platform width/height specs directly in pixels.

Image Resizer

Resize images by pixel dimensions or percentage with aspect ratio lock. Export JPEG, PNG, or WebP.

Files and content are processed locally in your browser and are not uploaded to our server.

About this tool

Scale photos to exact width/height pixels or by percentage while optionally locking aspect ratio. Preview dimensions, choose output format, and download resized files for thumbnails, social media sizes, or email-friendly dimensions. All processing takes place directly in your browser.

How to use

Resize by width, height, or percentage
Aspect ratio lock toggle
Output format JPEG, PNG, or WebP
Shows resulting dimensions before export
Resize several images at once
Upload images: Select photos to resize.
Set dimensions: Enter target width/height or scale percentage.
Export: Download resized files in chosen format.

Examples

Create 1200-pixel-wide images for a blog
Generate consistent thumbnail sizes for galleries
Reduce photo size before sending in a message
Create square 512×512 icons

Limitations

Upscaling cannot invent detail—expect softness when enlarging small sources
Image quality depends on the resizing method provided by the browser.
The uploaded images are processed directly in your browser and are not sent to a server.

FAQ

Will aspect lock crop?: Lock adjusts the paired dimension to maintain ratio—it does not crop unless you enter mismatched forced sizes.
Which format should I export?: JPEG/WebP for photos; PNG for graphics needing transparency.
Can I resize to exact social media sizes?: Yes. Enter platform width/height specs directly in pixels.