Resize Image Online — Change Image Dimensions Locally
Resize images online to a smaller maximum width while preserving aspect ratio. Process JPG, PNG and WebP files locally in your browser.
Your image is processed locally and is not uploaded.
About this tool
This online image resizer reduces the pixel width of a supported image in your browser and calculates the height automatically. Smaller dimensions can make images faster to upload and display without stretching the original proportions.
How to use
- Choose a JPG, PNG or WebP image.
- Enter the maximum output width in pixels; the height follows the original aspect ratio automatically.
- Resize the image, then download the new file.
Features
- Reduces image width to the selected pixel limit.
- Preserves the original aspect ratio automatically.
- Processes JPG, PNG and WebP images locally in the browser.
Common use cases
- Prepare product photos for a website or marketplace.
- Create smaller images for email and messaging.
- Match a required pixel size for profiles, forms or content systems.
Common issues and tips
- The tool does not enlarge an image beyond its original width.
- A very small output width can make fine text and details difficult to read.
Privacy
Image resizing happens locally in your browser. Your selected image is not uploaded to Tools12345.
Frequently asked questions
Does resizing reduce file size?
Reducing pixel dimensions usually lowers file size, although the exact result also depends on the output format and quality settings.
How do I avoid stretching an image?
The output height is calculated automatically from the original aspect ratio, so the image is not stretched.
Can this tool enlarge a low-resolution image?
No. The selected width is capped at the original image width because enlargement cannot restore missing detail.