Image Resize
Proportional scaling by width, height or percentage - no distortion
Drag & drop files here
or browse files
About this tool
Resizing is the most basic image job: an upload form caps the width, an avatar box is square, a web image needs slimming. This tool scales proportionally three ways - by target width, by target height, or by percentage - and the other dimension is derived automatically, so pictures are never stretched. Scaling uses high-quality Canvas resampling, keeping text and edges crisp after shrinking.
The output can keep the original format or switch to JPG, PNG or WebP: JPG/WebP usually shrinks the file dramatically, while PNG keeps transparency. Everything runs in your browser - images are never uploaded and the original file is never modified.
Features
- Three proportional modes: by width, by height, by percentage
- The other dimension is derived automatically - no distortion
- Live target-size preview before you commit
- Output format selectable: keep original, JPG, PNG or WebP
- Fully local - no upload, no signup, no watermark, no limits
How to use
- Drop or select the image you want to resize
- Pick a mode and enter the target value (e.g. width 800)
- Choose the output format and quality if needed
- Click Resize, compare the size and dimensions, then download
Frequently asked questions
- How do I resize an image without distortion?
- Use proportional scaling: specify only one of width, height or percentage, and the other side follows the original ratio. All three modes here are proportional, so stretching or squashing cannot happen.
- Why does enlarging make the image blurry?
- A bitmap has a fixed number of pixels; enlarging just interpolates the missing ones, and real detail cannot be invented. Prefer shrinking; when enlarging is unavoidable, keep the factor small.
- Why did my PNG get bigger after resizing?
- PNG is lossless, so re-encoding photographic content can grow the file. Switch the output to JPG or WebP for a much smaller file; keep PNG only when transparency matters.
- Can I resize images on my phone?
- Yes. The page works in mobile browsers - enter a target width or percentage and scale. Phone memory is limited though, so for very large pictures try the Image Compressor first.