or browse to upload · JPG, PNG, WEBP supported
Tips
Lock Aspect Ratio
Always keep aspect ratio locked to avoid stretching. Change the width and the height adjusts automatically to match proportions.
Social Media Sizes
Instagram post: 1080×1080px. Story: 1080×1920px. Facebook cover: 1640×856px. Twitter header: 1500×500px.
Use Percentage Mode
Want to halve the file? Switch to percentage mode and set 50%. Want double size? Set 200%. Quick and easy.
Free Online Image Resizer — Change Image Dimensions Instantly
Resize images online for free with iPixLab.com. Change image dimensions by pixels or percentage, lock aspect ratio to prevent distortion, and download instantly. No signup needed.
Why Resize Images?
- Resize photos for Instagram, Facebook or Twitter
- Reduce dimensions before sending by email
- Create thumbnail images for websites
- Prepare images for print at exact dimensions
- Resize profile pictures to required sizes
- Scale down large photos for faster sharing
Pixels vs Percentage
Use pixel mode when you need exact dimensions — for example 1920×1080 for HD video or 1080×1080 for Instagram. Use percentage mode when you want to quickly scale an image — 50% makes it half the size, 200% doubles it.
Lock Aspect Ratio Explained
Aspect ratio is the proportional relationship between image width and height. Locking it ensures the image does not get stretched or squished when you change one dimension. For example, a 1920×1080 image has a 16:9 aspect ratio — if you change the width to 1280, the height automatically becomes 720.