Image Resizer
Resize single or bulk images to any dimensions
Drop images here to resize
IMAGE/JPEG,IMAGE/PNG,IMAGE/WEBP · up to 50.0 MB · 20 files max
How to use Image Resizer
- Drop images into the upload zone.
- Enter the target dimensions, use a preset, or switch to percentage scaling.
- Enable aspect ratio lock to prevent distortion.
- Click Resize to apply, then download individual images or all as a ZIP.
When should I resize images?
Resize images before uploading them to the web to save bandwidth and improve page load times. A 4000×3000 photo straight from a modern phone is about 5 MB; resized to 1600×1200, it's often under 500 KB with no visible quality loss on most screens.
Most social media platforms have optimal dimensions for posts, covers, and profile pictures. Using the exact dimensions prevents the platform's auto-resize from degrading your image quality or cropping it awkwardly.
For print, resize by actual dimensions in inches or centimeters at 300 DPI. For screen-only use, 72-96 DPI is enough — what matters are the pixel dimensions relative to the viewport.
Frequently Asked Questions
How does the aspect ratio lock work?
When enabled, changing the width automatically recalculates the height to preserve the original image proportions (and vice versa). This prevents distortion. Turn it off if you intentionally want to stretch or squash an image.
What is the difference between resize and crop?
Resize scales the whole image to new dimensions, keeping all content. Crop removes parts of the image. This tool only resizes — if you need to crop, look for a dedicated cropping tool or use your operating system's built-in image editor.
Why does my downscaled image look blurry?
The browser's default image scaling uses a single-step algorithm. For very large reductions (e.g., 4000px to 400px), this can cause softness. This tool uses step-down resizing — halving the size iteratively — for better quality on large reductions.
Can I use the social media presets for other sizes?
Yes — the presets are starting points. After selecting one, you can further adjust the width/height values before applying.