Zmień rozmiar obrazu 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.
Prywatna lokalna zmiana rozmiaru
Twój obraz pozostaje w przeglądarce. ImageConver nie przesyła pliku źródłowego.
Jak to działa
- 1
Prześlij obraz
Choose a JPG, PNG, WebP, or other browser-readable image.
- 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.
Często zadawane pytania
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?
Nie. Twój obraz pozostaje w przeglądarce, a zmiana jego rozmiaru odbywa się lokalnie.
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.