Resize Image Online
Upload an image, enter the new pixel dimensions, keep the aspect ratio if needed, and download a resized PNG, JPG, or WebP.
Your resized image will appear here
Resize images for web, social, and documents
Exact pixel dimensions
Set the output width and height directly, or keep the original aspect ratio while changing one side.
PNG, JPG, or WebP output
Choose the format that fits your workflow, from transparent PNG to smaller WebP files.
Private local resizing
Váš obrázek zůstane ve vašem prohlížeči. ImageConver nenahraje zdrojový soubor.
Jak to funguje
-
1
Nahrajte obrázek
Vyberte obrázek JPG, PNG, WebP nebo jiný obrázek čitelný v prohlížeči.
-
2
Enter dimensions
Type the target width and height, then choose the output format.
-
3
Download result
Preview the resized image and save it to your device.
Best practices for image resizing
Resize images to the largest size you actually need. Smaller dimensions reduce file size and help pages load faster, while keeping aspect ratio prevents faces, products, and screenshots from looking stretched.
Často kladené otázky
Can I keep the original aspect ratio?
Yes. Turn on keep aspect ratio, then changing width or height automatically updates the other side.
Does resizing upload my image?
Ne. Váš obrázek zůstane ve vašem prohlížeči a změna velikosti proběhne lokálně.
Which output format should I use?
Use PNG for transparency, JPG for photos, and WebP when you want a smaller web-friendly file.
Resize Image Online last reviewed: Jun 27, 2026.