Resize Images Online
Resize JPG, PNG and WebP files to exact pixel dimensions, preserve aspect ratio and process files in bulk.
How to resize an image
- Select one or more images.
- Enter the new width and height.
- Choose the format and quality, then download.
Keep the aspect ratio
Locking the ratio prevents stretching. Change one dimension and the other is calculated automatically.
When should you resize an image?
Resize when a form requires exact pixel dimensions, you need a smaller email attachment, product images must share one size, or a website needs a lighter version. Resizing does not crop; the complete image is fitted to the width and height you select.
Supported formats and limits
- Input: JPG/JPEG, PNG and WebP; output: JPEG, PNG or WebP.
- With aspect ratio locked, changing one dimension calculates the other.
- The maximum output dimension is 12,000 × 12,000 pixels. Large batches can be limited by available device memory.
- The quality control affects JPEG and WebP compression; PNG is encoded losslessly.
Frequently asked questions
Are my images uploaded?
No. Decoding, redrawing and encoding happen on your device with the browser Canvas API.
Can I resize multiple images?
Yes. Select multiple JPG, PNG or WebP files. They receive the same output dimensions, format and quality settings.
Related tools
Use the Image Compressor to reduce file size without changing pixel dimensions, or browse Converters to change formats.
Resizing Is Not Cropping
With aspect ratio locked, changing width calculates height and prevents stretching. If every output must fill the same square, a separate crop is needed; this tool does not cut content from the edges. Enlarging a small source cannot create detail and may make softness more obvious.
JPEG and WebP quality balance bytes against detail. PNG has no percentage setting; choose PNG or WebP when transparency must remain. Processing happens in device memory, so very large batches may work more reliably in smaller groups.