Image Resizer
Resize to exact pixels or percentage — one image or a whole batch. Free, instant, and your files never leave your device.
Drag & drop images here
or click to browse your device
JPEG · PNG · WebP · batch supported · processed locally
Your files never leave your device.
Resized images
| File | Original | Resized | Size |
|---|
How to resize images
- Add your images — drag and drop or click to browse. They appear in a list; nothing happens yet.
- Choose dimensions. Enter a width (height follows automatically with the aspect lock on), or use Quick scale for 75/50/25/10% of the original.
- Click Resize images and download the results individually or all at once.
Pixels, percent, and aspect ratio
Digital images are grids of pixels; resizing changes the grid. Downscaling (making the grid smaller) is safe and makes files dramatically smaller — a 6000×4000 camera photo becomes a web-friendly 1920×1280 at a fraction of the weight, with no visible loss at typical viewing sizes. Upscaling is different: the tool invents pixels by interpolation, so a bigger image is a softer image. Modest upscaling (up to ~150%) is usually acceptable; don't expect to turn a thumbnail into a poster.
The aspect lock keeps proportions intact: set the width and height computes itself. Turning it off and setting both fields stretches the image to exactly that box — useful only when a system demands a fixed size (banners, avatars, ID photos). When both fields are set with the lock on, the image fits inside that box without distortion.
When you need it
- Websites and blogs — upload-size limits and page speed both reward right-sized images; 1920 px wide is plenty for full-width display.
- Email attachments — halving the dimensions quarters the weight.
- Online forms — passport photos, avatars and ID uploads often demand exact dimensions like 600×600.
- Social media — each platform has its preferred sizes; resizing before upload beats the platform's own compression.
- Thumbnails — batch-shrink a whole folder for a gallery or preview set.
Pair it with the image compressor for the smallest possible results: resize first, then compress.
Frequently asked questions
Are my images uploaded to a server?
No. Resizing happens entirely in your browser. Your images never leave your device, and closing the tab discards everything.
Does resizing reduce quality?
Downscaling (making smaller) looks great — the output stays sharp. Upscaling (making bigger) cannot invent detail: the image will look softer. Keep upscaling modest (under ~150%) for acceptable results.
What does "lock aspect ratio" do?
It keeps the image's proportions: set just the width and the height follows automatically. With it off, setting both dimensions stretches the image to exactly those pixels — usually not what you want unless you're matching a fixed slot.
Which output format do I get?
The same format you dropped in (JPEG stays JPEG, PNG stays PNG, WebP stays WebP). To change format as well, use the Image Converter.
Is there a size or batch limit?
No artificial limit. Dozens of high-resolution photos resize in seconds on any modern phone or computer.