Image Resizer
Resize by pixels, percentage, or common presets. Lock the aspect ratio for a contain fit and batch process multiple files.
Drop images here or click to browse
JPG, PNG, WebP · up to 25 MB each · max 20 files
Your images are processed entirely in your browser. They are never uploaded to a server unless you explicitly save them to your cloud (available after sign-in).
How to use
- Add one or more JPG, PNG, or WebP images to the drop zone.
- Pick a mode: resize by exact pixels, by percentage, or using a common preset.
- Enter the target width and/or height. With the aspect-ratio lock on, the other dimension updates automatically for a contain fit.
- Click Resize. Each result shows the before-and-after dimensions.
- Download individually or as a ZIP; signed-in users can save results to their private cloud.
When to use it
- Fitting a cover photo or banner to an exact platform dimension.
- Scaling a batch of photos down for a slideshow or thumbnail grid.
- Preparing images so a web page stays under a layout budget.
- Shrinking phone photos before sharing over a slow connection.
Contain fit and aspect ratio
Locking the aspect ratio gives you a contain fit: the image is scaled so it fits entirely within the target box without stretching or cropping. If you need an exact crop to a ratio instead, use the Image Cropper.
Upscaling is discouraged
Scaling an image up does not add real detail — it just interpolates existing pixels, which looks soft. The tool allows it but flags unusually large outputs so you know the result may not be sharp.
FAQ
- Can I resize to a percentage instead of pixels?
- Yes. Switch to percentage mode and enter a scale like 50%. The new pixel dimensions are computed from the original size.
- What happens to very large images?
- Images near the browser's memory limits are flagged. You can still process them, but reducing the batch size helps avoid slow decoding.
- Does resizing change the file format?
- Only if you choose a different output format. By default the original format is kept.