To resize an image, drop your JPG, PNG or WebP files into the box above and choose a mode: pixels (enter a width and/or height, with aspect ratio kept by default) or percentage (for example 50%). Click Resize, and each image is resampled in your browser in its original format. Download the files one by one or as a ZIP.
How to use the Resize Image tool
- 1
Add your images
Drop JPG, PNG or WebP files in or click to select them. Up to 50 files per run, each up to 50 MB.
- 2
Choose pixels or percentage
In pixel mode, enter a width, a height or both; 'keep aspect ratio' is on by default. In percentage mode, enter a value such as 50%.
- 3
Resize
Click Resize. Your browser resamples each image at high quality, keeping its original format.
- 4
Download
Save the resized images individually or download them all as a ZIP.
Pixels or percentage: which mode should you use?
Use pixel mode when you need to change image size to meet a specific requirement, such as a maximum width for a website column, a fixed size for a profile picture or an upload form that rejects images above a certain size. With 'keep aspect ratio' on, you can type only the width (or only the height) and the other side is calculated so the image is not stretched.
Use percentage mode when you simply want everything smaller or larger by the same proportion, for example halving a batch of photos to 50% before emailing them. Percentage resizing works well for batches of different sizes, since each image keeps its own proportions and is scaled relative to itself.
Aspect ratio, common sizes and image quality
Aspect ratio is the relationship between width and height. If you turn off 'keep aspect ratio' and enter both a width and a height that do not match the original shape, the image will be squeezed or stretched. To get a different shape without distortion, crop the image in an editor first, then resize it here.
Common target sizes are often round widths such as 800, 1200, 1920 or 2048 pixels, or a square 1080 × 1080 image for an Instagram post. Treat these as examples only; requirements differ from site to site and change over time, so check the current guidelines of the platform you are uploading to.
To keep downsized images sharp, the tool uses the browser's high-quality resampling, and large reductions are done in several halving steps rather than one big jump, which avoids the jagged, noisy look of a single-step downscale. JPG and WebP results are saved at quality 92, and PNGs stay lossless. Enlarging is possible too, but it cannot invent detail, so upscaled images will look softer.
Resize ID photos and documents without uploading them
Resizing is often needed for sensitive images: passport-style photos for an application, scans of ID cards, signed documents or pictures of children for a school portal. These are exactly the files you should not be sending to an unknown service.
Krawly resizes images inside your browser. The files are never uploaded to Krawly's servers, nothing is stored, and closing the tab removes everything. The resized copies do not keep the original EXIF metadata, so GPS location and camera details are dropped as well.
Tips for the best results
- Enter only the width with 'keep aspect ratio' on to avoid distorting the image.
- Crop first if you need a different shape, then resize to the exact pixel size.
- Avoid upscaling small images a lot; they will look soft because no detail can be added.
- Check the current size requirements of the site you are uploading to rather than relying on old guides.
- Combine with the compress tool if you need an even smaller file after resizing.
Frequently asked questions
How do I resize an image without stretching it?
Keep the 'keep aspect ratio' option on, which is the default, and enter only the width or only the height. The other dimension is calculated automatically so the image keeps its original proportions.
Can I resize an image without losing quality?
Downsizing removes pixels, so some fine detail goes, but with high-quality resampling and step-by-step reduction the result stays sharp. JPG and WebP files are saved at quality 92 and PNGs stay lossless. Enlarging makes images softer because it cannot add real detail.
Can I make an image bigger?
Yes, upscaling is allowed in both pixel and percentage mode. However, the tool cannot create detail that was not in the original, so a heavily enlarged image will look blurry or soft.
Can I resize many images at once?
Yes. You can resize up to 50 JPG, PNG or WebP images in one run with the same settings and download them as a single ZIP file. Percentage mode is handy when the images have different sizes.
Will resizing change my image format?
No. The output keeps the input format: JPGs stay JPG, PNGs stay PNG and WebPs stay WebP, and file names stay the same. Use one of the converters if you also need a different format.
Are my images uploaded?
No. Resizing happens in your browser using its built-in canvas, which matters for ID photos and scanned documents. Your files are never sent to Krawly's servers and nothing is stored after you close the tab.
Private by design. Every Krawly converter runs inside your browser using JavaScript and WebAssembly. Your files are not uploaded, stored or seen by anyone — when you close the tab, they are gone.