How to resize an image without losing quality
5 min read
Resizing the wrong way introduces blur and jagged edges. With the right settings you can change an image's dimensions while keeping it sharp — here is how.
Downscaling vs upscaling
The single most important rule: downscaling preserves quality, upscaling cannot create it. Reducing a 4000-pixel photo to 1000 pixels throws away pixels you do not need and looks great. Enlarging a 500-pixel image to 2000 pixels has to invent detail, which always softens the result. Whenever possible, start from the largest original you have.
Use high-quality scaling
Scaling an image down in one big jump can cause aliasing — jagged or shimmery edges. Our resize tool uses progressive, high-quality downscaling that steps the image down smoothly, the same technique professional editors use, so fine detail and edges stay clean.
Step-by-step
- Add your image and open the Resize tab.
- Type the exact width or height you need. With aspect ratio locked, the other value fills in automatically.
- Use the 25% / 50% / 75% buttons for quick proportional resizing.
- In the Export tab, choose PNG for lossless results or a high-quality WebP/JPG for a smaller file.
Resize for the web
Displaying a 4000-pixel image in a 800-pixel slot wastes bandwidth and slows your page. Resize to the dimensions you actually display, then compress or convert to WebP for the best balance of quality and speed.
Frequently asked questions
Can you resize an image without losing quality?
When making an image smaller (downscaling), quality is preserved well — especially with high-quality scaling. Making an image larger (upscaling) cannot add detail that was not captured, so some softening is unavoidable.
Why does my resized image look blurry?
Blur usually comes from upscaling beyond the original resolution, or from low-quality single-step scaling. Downscale from the largest available original and export at high quality.
Should I keep the aspect ratio?
Almost always yes. Locking the aspect ratio prevents the image from looking stretched or squashed. Unlock it only when you intentionally need a different shape.
What format keeps the most quality after resizing?
PNG is lossless and keeps every pixel. High-quality WebP is nearly as good with a much smaller file. Avoid low-quality JPG if sharpness matters.