Set exact dimensions or a percent preset. Your image never leaves your device.
or drop the image here
Resizing…
RoundCut's image resizer changes any photo to the exact pixel dimensions you need. Type a custom width and height, or pick a quick percent preset: 25%, 50%, 75%, 150%, or 200% of the original size. Aspect ratio locks automatically so your image never stretches. Toggle "Don't enlarge if smaller" to prevent accidental upscaling when the target is larger than the source. When you are done, choose your output format: PNG for lossless quality, JPG for the smallest file, WebP for modern-browser compression, or AVIF for next-generation size savings. A quality slider (JPG, WebP, AVIF only) lets you tune sharpness against file size before downloading. The entire resize runs in your browser — nothing is uploaded to any server. Open the DevTools Network panel, select a file, and click Resize — you will see zero outbound file transfers. Free, no account required, one file at a time.
Your file is read and resampled entirely in your browser tab — no pixel of your photo is sent to a server. To verify: open your browser's DevTools, go to the Network tab, upload an image, and click Resize. You will see the page load its tools but zero requests carrying your file. Once the resized image is ready, it downloads directly from your browser as a file. Nothing is stored anywhere.
PNG keeps every pixel exactly as-is — best for logos, screenshots, or anything with transparent areas. JPG produces the smallest files for photos where a small quality reduction is acceptable. WebP gives JPG-level compression with better quality retention, supported by all modern browsers. AVIF produces the smallest files of the four — 30–50% smaller than JPG at the same visual quality — but takes longer to generate on some browsers. The quality slider (not available for PNG) lets you find the right balance.
Resizing changes the pixel count — a 4000×3000 photo becomes 2000×1500. Fewer pixels means a smaller file, but the result is a physically smaller image. Compressing keeps the same pixel dimensions and reduces file size by lowering quality. If you need your image to fit a specific width or height, you are in the right place. If you just want a smaller file at the same size, use the compress tool.
Increasing an image beyond its original size — using the 150% or 200% presets, or typing a larger target — works by estimating the color of pixels that were not there. Results are sharpest for moderate enlargements (up to 200%). Past that point the image will look blurry. For AI-assisted upscaling that reconstructs fine detail, use the upscale tool instead.
Downsizing removes pixels the display does not need, so quality loss is minimal. Upscaling adds estimated pixels — results stay sharp up to about 200% of the original size; beyond that, blurring appears.
Start with the highest-resolution original you have and downsize to the target dimensions. Keeping aspect ratio locked prevents distortion. For downloads that need to stay sharp, output to PNG (lossless) or WebP (lossy but high-quality at default settings).
Resizing changes the pixel count — the image becomes physically smaller. Compressing keeps the same pixel dimensions and reduces file size by lowering quality. Use resize when a platform requires specific pixel dimensions; use compress when the image must stay the same size but weigh less.
Yes. This tool scales the entire image to the new dimensions. Nothing is cropped. Toggle "Maintain aspect ratio" to keep proportions — if you need to cut a portion of the image instead, use the crop tool.
Set your target pixel dimensions, then choose JPG, WebP, or AVIF output and use the quality slider to reduce file size. The done screen shows the output file size so you can compare before downloading. PNG output is always lossless and ignores the quality slider.