Image Resizer & Compressor
Select images, choose a target width/height in pixels or a scale percentage, and resize them in your browser before compressing to WebP, JPEG, or PNG. Handy for shrinking images before uploading to social media or a blog. You can process several files at once. If you only need format conversion, try the Image Format Converter instead.
🔒 Runs in your browser · Your data is never sent to a server
You can also drag and drop image files here (multiple allowed)
PNG is lossless, so the quality setting has no effect (the original transparency is preserved as-is)
Converted files
How to use
- Choose your image files (multiple files and drag & drop are supported).
- Pick a resize method, "Pixel size" or "Percentage", and enter the width and height or the scale.
- Choose the output format and, for JPEG and WebP, adjust the quality (compression level).
- Check the before/after sizes in the results list, then download the files.
Notes
- When processing multiple images, specifying only a width or only a height resizes each image while keeping its own aspect ratio. Unlocking the aspect ratio and setting both width and height forces every image to that exact size, ignoring its original ratio.
- Enlarging (scaling above 100%, or to a width/height larger than the original) is possible, but quality can never exceed the original, so results may look blurry.
- JPEG has no alpha channel, so transparent areas are filled with white. Use WebP or PNG if you need to keep transparency.
- Conversion may fail in browsers that lack WebP encoding support. Use a recent version of Chrome, Firefox, Edge, or Safari.
- Converting an animated GIF discards the animation and keeps only its first frame.
- All processing happens in your browser — the images you select are never sent to a server.
Glossary
Aspect ratio
The ratio between an image's width and height. Resizing with the aspect ratio locked keeps the image looking the same, just larger or smaller, instead of stretching or squashing it.
WebP
An image format developed by Google that achieves smaller file sizes than JPEG or PNG at a similar visual quality. It also supports transparency (an alpha channel), making it popular for improving page load speed.
Lossless / lossy compression
Lossless compression (like PNG) can fully restore the original data after compression. Lossy compression (like JPEG or WebP) discards some data to shrink file size significantly, but the original quality cannot be fully recovered.
FAQ
How is aspect ratio handled when resizing several images?
If you specify only width or height, each image keeps its own aspect ratio. If you unlock the ratio and set both, all images are forced to the same size.
Does enlarging improve quality?
No. You can enlarge images, but detail cannot be restored, so they may look blurry. Start from the largest original whenever possible.
How can I get a smaller file after resizing?
Export as WebP and tune the quality to reduce file size with little visual loss. PNG is lossless, so size reduction mostly comes from shrinking dimensions.
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