About this tool
Whether you are preparing product photos for a marketplace, thumbnails for a blog, or avatars that must be exactly 256 pixels, this resizer gets the job done without an upload. Drop in one image or a whole folder's worth, then choose your mode: exact pixel dimensions, a percentage scale, or a longest-side constraint that fits everything into a bounding box. The aspect-ratio lock keeps proportions honest so nothing comes out stretched. Batch mode applies the same rule to every image and reports the new dimensions as it goes, then lets you download the results individually or in one go. Resizing uses high-quality canvas smoothing, so downscaled images stay crisp rather than turning blocky. Because the work happens locally in your browser, it is safe for unreleased designs, client assets and personal photos alike — nothing is transmitted or stored. It is the quick, private answer to a task that otherwise sends people reaching for heavyweight editors or sketchy upload sites.
How to use Image Resizer
- Drop one or more images into the tool.
- Choose resize mode: pixels, percentage, or max longest side.
- Set the target dimensions, keeping aspect lock on unless you want to stretch.
- Press Resize, then download the results individually or as a batch.
Frequently asked questions
Will resizing reduce image quality?
Downscaling with high-quality smoothing stays sharp. Upscaling beyond the original size cannot add detail and will look softer.
Which formats are supported?
JPEG, PNG and WebP are supported for both input and output.
Can I resize many images at once?
Yes. Batch mode applies your settings to every dropped image and reports each result's new dimensions.
Are my images uploaded?
No. All processing happens locally in your browser; nothing is transmitted or stored.