How to use this tool
- Choose a JPG, PNG or WebP image. The browser reads its dimensions locally.
- Enter a width or height, keep the aspect ratio locked, or choose a practical preset.
- Pick the output format and quality, resize, inspect the result, then download it.
Practical uses
- Prepare a 1080 × 1080 square image for a social post.
- Reduce oversized camera photos before adding them to a website.
- Create a WebP copy while controlling dimensions and visual quality.
Limitations to know
- Animated images are flattened to a single frame.
- PNG ignores the quality slider because it uses lossless browser encoding.
- Very large images may exceed the memory available on older phones; the tool blocks unsafe pixel counts.
- Color profiles and EXIF metadata are not preserved in the generated copy.
Frequently asked questions
Does Semawork upload my image?
No. This tool decodes, resizes and exports the image in your browser. The file is not sent to Semawork.
Which format should I choose?
Use JPEG for photographs, PNG when transparency matters, and WebP for a modern balance of quality and file size.
Will resizing improve a blurry image?
No. Enlarging adds pixels but cannot restore detail that was not present in the source.
Why can the output be larger?
Dimensions, format, transparency and quality all affect size. A lossless PNG can be larger than a JPEG source.
Related tools
- Image Compressor — Reduce image file size locally with visible quality controls.
- Image Converter — Convert between JPG, PNG and WebP in your browser.
- Image Cropper — Crop an image to exact dimensions or useful social presets.