Resize an image online
Drop images here, or click to browse
Resize multiple at once — your files never leave your browser
or paste an image from your clipboard
Whether you need an image to fit a specific upload requirement or just want a smaller file for a webpage, this tool resizes one or many images to a target width using the browser's Canvas API — each image's own aspect ratio is preserved automatically. Upload your images, set the target width, and download each resized result with a before/after preview. Nothing is uploaded to a server.
Resizing down is safe, resizing up is not
Reducing an image's dimensions discards pixels, which sounds destructive but is almost always invisible — you are throwing away detail that was never going to be displayed. Enlarging is a different matter. A 400-pixel-wide image stretched to 1600 pixels has no extra detail to draw on, so the software invents pixels by interpolating between existing ones. The result looks soft and smeared. If you need a large image, it has to come from a large original.
Aspect ratio is locked deliberately
Set a target width and the height follows automatically, preserving each image's own proportions. This prevents the most common resizing mistake: entering both dimensions and stretching a photo into distortion. It does mean this tool cannot force an image into a specific shape — for a square post or a passport photo ratio, crop first to establish the shape, then resize to set the pixel dimensions. Cropping and resizing are two separate operations and doing them in that order gives predictable results.
Resize first, compress second
When an image needs to meet both a dimension requirement and a file size limit, always resize before compressing. Resizing removes pixels, which reduces the amount of data the compressor has to work with, so it can then use a much higher quality setting to hit the same target size. Compressing first and resizing after wastes that opportunity — you degrade quality to shrink a file, then throw away the very pixels you just spent quality preserving.
Frequently asked questions
- Can I resize without keeping the aspect ratio?
- This tool locks the aspect ratio automatically to prevent accidental stretching. For a specific non-proportional size, crop first, then resize.
- Does resizing reduce file size too?
- Usually yes, since fewer pixels means less data, but resizing and compression are different operations — use the JPG compressor for a specific target KB.
- Can I resize multiple images at once?
- Yes, drop in several images and each is resized to the same target width, with its own aspect ratio, preview, and download button.
- Are my images uploaded to a server?
- No, resizing happens locally in your browser using the Canvas API. Nothing is sent anywhere.
- What image formats are supported?
- JPG, PNG, and WebP. PNG transparency is preserved; other formats are output as JPG.
- Can I resize several images at once?
- Yes. Drop in multiple images and each is resized to the same target width while keeping its own aspect ratio, with a ZIP download for the whole set.
- Will resizing reduce file size?
- Usually significantly, since there are far fewer pixels to store. It is often more effective than compression for hitting a size target.