Free Online Image Resizer
Change image width and height in pixels or percentage. Fast, accurate batch resizing for web and social media.
Drag your files here
Upload batch multimedia files (Max 25MB per file) or press Ctrl+V to paste directly🔗 Need more tools? YOU CAN ALSO 🔄 Convert image format (WebP, JPG, PNG, PDF) or 📉 COMPRESS SIZE
🔒 Procesamiento 100% privado en tu navegador. Tus imágenes nunca se suben a ningún servidor
Frequently Asked Questions
We answer your questions about privacy, features, and limits.
How to change the size of a photo in pixels exactly and precisely?
You can do this manually by entering the corresponding numerical values for width or height in the direct form selectors without relying on preset scales.
What is an image's aspect ratio and why should it remain locked?
The aspect ratio safeguards the geometric proportion of your graphic; locking it ensures that changing the width will automatically update the height to avoid unwanted stretching.
What are the recommended dimensions in pixels for main Social Networks?
Usually, 1080x1080px works perfectly for square posts (Instagram/Facebook), 1200x630px for covers or previews, and 1080x1920px for vertical stories or reels.
How to adjust the measurements of my images in batch without stretching or deforming them?
By applying the protection lock (proportionality). The resizer will adapt each individual image to the requested margin by intelligently rescaling the opposite measurement without altering its proportions.
What happens if I try to increase the size (upscaling) of a very small digital photograph?
Expanding an image beyond its base pixels causes natural blurring because browsers must interpolate non-existent data. We recommend its use more towards reduction (downscaling).
Is it possible to resize my files using proportional percentages instead of pixels?
The current version requires strict reference measurements in pixels (px). This way you guarantee total control for the final front-end without discrepancies from variable source sizes.
How to configure the exact dimensions for standard web banner design?
For most web hero sections, using references of 1920 pixels wide and leaving the height proportional usually provides the expected impactful results on Desktop monitors.
What are the quick preset buttons like Full HD or square formats for?
They are buttons to optimize times. They instantly inject validated configurations (like 1920x1080), avoiding keyboard typing if you constantly process popular visual profiles.
Does the resize tool also collaterally reduce the file's KB weight?
Certainly, by decreasing the physical area in pixels, you are decreasing the rendering matrix area. It is one of the most powerful techniques to lighten photos without compression.
How do I download my resized images individually or packaged?
After the bulk adjustment, you will have buttons with unified ZIP download available for greater convenience, or, if you require it, attached row buttons to download them sequentially.