Keep proportions
Aspect-ratio lock is on by default to prevent accidental stretching.
Free browser tool
Free Online Image Resizer
Change the dimensions of JPG, PNG, and WebP images with custom sizes, useful presets, or percentages. Preview and download one image or a complete batch.
Private local processing. No account needed.
Your images are processed in your browser and are not uploaded to our server.
Change image dimensions
A simple image resizer for everyday work
Resizing changes an image’s pixel width and height. It is useful for website banners, social posts, profile images, email attachments, and any place with dimension requirements.
ToolsWeave uses your browser’s native image and canvas features, so you can resize a JPG, resize a PNG, or resize a WebP without waiting for an upload.
How to resize an image
- 1
Upload
Choose one or more supported images.
- 2
Choose size
Use a percentage, preset, or custom dimensions.
- 3
Resize
Process locally and review each preview.
- 4
Download
Save one result or download the batch as a ZIP.
Resize with control
Use exact dimensions
Unlock the aspect ratio when an exact width and height matter more than the original shape.
Handle batches
Percentages preserve each image’s size relationship, and presets fit varied images inside a shared boundary.
Stay private
Image content remains on your device throughout the resizing and download workflow.
Frequently asked questions
Are my images uploaded to ToolsWeave?
No. Image reading, resizing, previewing, and ZIP creation happen in your browser. The files are not sent to the ToolsWeave server.
Which image formats can I resize?
You can resize static JPG/JPEG, PNG, and WebP images. Animated PNG and WebP files are rejected because resizing them with browser canvas would remove their animation.
What does locking the aspect ratio do?
It keeps the original relationship between width and height so the image is not stretched. In a mixed-shape batch, final dimensions can differ because each image keeps its own proportions.
How do size presets work?
With aspect ratio locked, a preset is a bounding box: each image fits inside that width and height without distortion. Unlock the aspect ratio if every output must use the exact preset dimensions.
Can I resize multiple images together?
Yes. Select up to 20 images and apply a percentage, preset, or custom dimensions. Each successful image can be downloaded separately, and two or more results can be downloaded together as a ZIP.
Why can the resized file be larger?
Pixel dimensions and file size are related, but they are not the same. Format, image detail, and browser encoding also affect bytes. If you need a smaller file after resizing, use the Image Compressor.
More image tools
Start with the right framing in the Image Cropper, convert the resized image when another format is required, then compress the result when file size matters.