Image Resizer made simple
Resize multiple images online for free. Scale to any dimensions, percentage, or use popular presets for social media and web.
Upload your images
Drag & drop or browse to select multiple images to resize
Drop your images here
or click to browse
Supports PNG, JPG, WebP, GIF (static), BMP & SVG · Max 20MB per file · Batch resize supported
Resize your images
Click on any image in the queue to preview original vs resized
Select an image to preview
Waiting for resize
Ready to download
Your resized images are ready for download
Files are processed entirely in your browser and are never uploaded to a server.
Supported formats
Input decoding and output encoding depend on your browser — we auto-detect and disable anything it can't produce
Input (upload)
Output (download)
*Depends on your browser's built-in codecs. Animated GIFs are decoded as a single static frame — animation is not preserved.
The Ultimate Guide to Resizing Images Online
Everything you need to know about resizing images for web, social media, and print
What is an Image Resizer?
An image resizer is a tool that changes the dimensions of images. Whether you need to resize multiple images online for social media, web design, or printing, our free image resizer lets you scale to exact pixel dimensions, percentages, or use popular presets—all in batch mode.
Why Batch Resize Images?
Save Time
Resize hundreds of images at once instead of one by one. Perfect for photographers and content creators.
Social Media Ready
Resize all your images to the exact dimensions required for Instagram, Facebook, Twitter, and more.
Consistent Results
Apply the same resize settings to all images for consistent quality and dimensions across your entire set.
Understanding Resize Modes
📐 Custom Dimensions
Set exact width and height in pixels. Lock the aspect ratio to auto-adjust the other value, or unlock it to stretch to an exact size.
📊 Percentage
Scale every image by a percentage (10% to 400%) of its own original size.
📋 Preset Sizes
Pick a social media or web preset — combine it with Fit or Cover below.
📦 Fit to Box
Resize to fit within a preset's dimensions while keeping the full image visible. Adds padding if the aspect ratio doesn't match.
🖼️ Cover Box
Resize to fill a preset's dimensions exactly, cropping the edges as needed to avoid any padding.
💡 Pro Tip: Use "Fit" for images that must be fully visible, "Cover" for backgrounds and banners where cropping is acceptable.
Popular Resize Presets
| Platform | Dimensions (px) | Aspect Ratio | Use Case |
|---|---|---|---|
| Instagram Square | 1080 × 1080 | 1:1 | Posts, Profile |
| Instagram Portrait | 1080 × 1350 | 4:5 | Posts, Stories |
| Instagram Story | 1080 × 1920 | 9:16 | Stories, Reels |
| YouTube Thumbnail | 1280 × 720 | 16:9 | Video Thumbnails |
| Facebook Post | 1200 × 630 | 1.91:1 | Link Posts |
| Twitter Header | 1500 × 500 | 3:1 | Profile Banners |
| Pinterest Pin | 1000 × 1500 | 2:3 | Pins, Graphics |
| Web Banner | 1920 × 1080 | 16:9 | Hero Images |
Pro Tips for Batch Resizing
- Use Lock Aspect Ratio in Custom mode to prevent distortion
- Enable Allow Upscaling only when you actually need to enlarge images
- Choose WebP for the best quality-to-size ratio if your browser supports encoding it
- Use Presets for social media to save time
- Add a suffix or prefix to easily identify resized images
Frequently Asked Questions About Resizing Images
How do I resize multiple images online?
Upload all your images at once, choose your resize settings, and click "Resize All". All images are resized with the same settings.
What is the difference between Fit and Cover?
Fit resizes the image to stay fully visible inside the target box (may add padding). Cover fills the target box exactly (may crop the edges).
Can I resize images without losing quality?
Shrinking an image doesn't lose meaningful quality. Enlarging beyond the original resolution requires "Allow Upscaling" and will look softer, since new pixels are interpolated rather than captured.
What image formats are supported?
You can upload PNG, JPG, WebP, GIF, BMP, SVG, and AVIF (browser-dependent). You can export as PNG, JPG, WebP, or AVIF — WebP and AVIF export depend on your browser's built-in encoder, and unsupported options are disabled automatically.
How do I resize images for social media?
Switch Resize Mode to "Preset Size", pick your platform, and choose Fit or Cover for how the crop should behave.
Is this image resizer free to use?
Yes — it's completely free, with no sign-up, and everything runs locally in your browser rather than on a server.