About the Image Enlarger
Image Enlarger makes a picture bigger in pixels. Choose 2×, 3×, 4× or type a width, and the tool builds the larger copy with Lanczos resampling, a classic method that keeps edges cleaner than the plain stretching most viewers do. An optional sharpen slider adds crispness afterwards. Be realistic: enlarging cannot invent detail that was never in the photo, so the result is a smoother, sharper-looking bigger copy, not a restored one. It is not artificial-intelligence upscaling. Everything runs on your device.
Updated September 2026
How to use the Image Enlarger
- 1Select an image, or drop one on the page. Its current size is shown.
- 2Choose 2×, 3× or 4×, or pick Custom width and type the pixels you need.
- 3Set Sharpen after enlarging, or move it to 0 to switch it off.
- 4Choose PNG, JPG or WebP and click Enlarge image.
- 5Compare Before and After, then click Download.
What enlarging can and cannot do
A digital picture is a fixed grid of pixels. To make it bigger, software has to fill in new pixels between the old ones, and it can only work out their colours from the pixels that are already there. That is why enlarging makes an image bigger without making it more detailed.
Lanczos resampling looks at a small neighbourhood of surrounding pixels and weights them with a smooth curve. It tends to keep edges tidy and avoids the blocky look of simple stretching. It will not restore a face from a thumbnail or make text readable if it was unreadable already.
Choosing 2×, 3× or 4×
Small steps look better than big ones. If a 2× copy is enough, do not go to 4×. Doubling suits most needs: a website banner that is slightly too small, a profile photo, a screenshot for a slide.
The bigger the factor, the softer the picture. If you need an exact size for a form or a layout, use Custom width instead of a factor and read the new size line before enlarging.
- 2×: the safe choice for most photos and graphics.
- 3× and 4×: fine for simple artwork, soft for detailed photos.
- Custom width: use it when a form or layout asks for a set number of pixels.
Sharpening after you enlarge
Enlarged pictures often look a touch soft. The sharpen slider blends the result with a standard sharpening filter. The default of 30 gives a light lift; 60 to 100 is stronger and can produce bright outlines around edges.
Set it to 0 for the plain resampled result, which is best for pictures that are already crisp, such as pixel art screenshots or clean logos. Sharpen leaves the outermost row of pixels alone and never changes transparency.
Enlarging for print or profile photos
For printing, decide the physical size and the pixels per inch first; 300 is common for photos, and lower for posters viewed from a distance. Enter the resulting pixel width as a custom width. For profile photos, aim for the minimum the site asks for, then crop with Crop Image.
To reduce a file afterwards, use Compress Image, and to set exact dimensions or a smaller size, use Image Resizer. Image Converter changes the format when a site accepts only one type.
Features
- 2×, 3×, 4× or a custom width in pixels
- Lanczos resampling for smooth edges
- Sharpen slider, from 0 to 100
- Transparent PNGs keep their transparency
- PNG, JPG or WebP output
- Before and after preview with progress
- Private: the picture never leaves your device
Frequently asked questions
Does enlarging reduce quality?
Enlarging cannot add real detail, so a bigger copy always looks softer up close than a photo that was taken at that size. Lanczos resampling keeps the softness gentle, and a little sharpening helps, but a very small or blurry picture stays soft.
Is this AI upscaling?
No. It uses a fixed mathematical resampling formula, Lanczos, and an optional sharpen filter. It does not guess or paint in missing detail the way trained models do, which is why the result is predictable and faithful to the original.
How do I increase image size in pixels?
Pick 2×, 3× or 4×, or choose Custom width and type the width you need. The height follows automatically so the picture is not squashed. The new size appears under the buttons before you start.
What is the largest size I can make?
The result can be up to 8,192 pixels on a side and about 16.7 million pixels in total, so phones can cope. If your choice is bigger, the tool scales it down to the largest size that fits and tells you.
How do I enlarge a photo for printing?
Print size depends on pixels per inch, not on this tool. Work out the pixels you need, for example 6 inches at 300 pixels per inch is 1,800 pixels, then enter that as a custom width. Make sure the original is sharp first.
Which format should I save it in?
PNG keeps every pixel exactly and supports transparency, so it suits graphics and screenshots, though files get large. JPG and WebP make smaller files for photos. The tool starts with the same format as your original where it can.