What image formats can I resize?

You can resize common image formats like JPG, PNG, WebP, GIF, BMP and AVIF. The output format will be the same as the input unless you use our separate Image Converter tool.

How do I maintain the aspect ratio?

Enable "Maintain Aspect Ratio." When active, entering width auto-calculates height (and vice-versa) so images keep original proportions.

Can I resize images by percentage or pixels?

Yes. Use "Pixels" for exact dimensions or "Percentage" to scale relative to the original image size.

What are the dimension limits, and what happens if my settings exceed them?

To ensure optimal performance and prevent overly large images, output images are capped at a maximum dimension of 10000 pixels for both width and height. If your settings result in dimensions exceeding this, they will be automatically adjusted down to this limit while maintaining your chosen aspect ratio settings. You'll see a 'Capped to max dimension' message on the image card if this adjustment occurs.

How does aspect ratio work with multiple images of different sizes?

Each file is resized using its own original proportions. Your target dimensions act as a bounding box, so images fit without distortion.

Will resizing affect image quality?

Downscaling usually preserves quality well. Upscaling can soften details or cause pixelation, so start with the highest-resolution source available.

What happens to my uploaded files after resizing?

Files are processed temporarily, then automatically deleted shortly after processing or inactivity. See our Privacy Policy.

Can I resize animated GIFs?

Yes, you can resize animated GIFs. Our tool will preserve the animation, applying the resize operation to all frames of the GIF.

Does resizing also compress my image?

Resizing changes pixel dimensions, which often lowers file size. Compression is separate and optimizes image data itself. For maximum size reduction, run outputs through Image Compressor.

Home
Image Tools
Image Resizer

Image Resizing Tool

Resize Images

Quickly change the dimensions of your JPG, PNG, WebP, GIF, AVIF, and BMP images. Adjust by pixels or percentage, maintain aspect ratio, and easily download your resized images.

1. Upload Image

Start with your image file.

2. Set Dimensions

Enter width/height (px or %).

3. Download Resized

Get your perfectly sized image.

How to Use the Image Resizer

Upload Images

Drag & drop or click to select your images (JPG, PNG, WebP, GIF, etc.).

Set Dimensions

Choose to resize by pixels or percentage. For pixels, enter your desired width/height and optionally lock the aspect ratio. For percentage, use the slider to set the scale.

Resize Images

Click "Resize Images" to process uploaded files with your chosen settings.

Download Files

Download resized images individually or as a ZIP archive.

Upload Images to Resize

Select images to resize

Click to browse

or drop files here

Supports: JPEG, PNG, GIF, WebP, AVIF, BMP | Max 10 files, 10MB each.

Uploading...

File Issues:

Uploading batch...

Files in current batch: Pending server processing: Upload issues:

Resize Options

Dimension Presets (Optional)

Select a common size, or choose Custom.

Resize Unit

Target Width (px)

Target Height (px)

(Max: 10000px) The maximum allowed width for the resized image in pixels.

(Max: 10000px) The maximum allowed height for the resized image in pixels.

Maintain Aspect Ratio Keeps the original width-to-height ratio. If resizing by pixels and both width/height are entered, the image fits within those dimensions without distortion. (Uses aspect ratio of the first image) (Aspect ratio may be adjusted to fit inputs)

Download File Download ZIP ( )

Related workflow

Related Image Tools

Explore related tools to keep your workflow fast and consistent.

Keep moving

Image Compressor

Shrink resized images for faster loading.

Open tool

Keep moving

Image Format Converter

Convert resized images to delivery-friendly formats.

Open tool

Keep moving

HEIC/AVIF Converter

Convert mobile formats before resizing batches.

Open tool

Keep moving

EXIF Metadata Cleaner

Remove metadata once final dimensions are ready.

Open tool

Related Guides

View all guides

Practical playbooks to help you ship faster with fewer mistakes.

Responsive Images with srcset and sizes

10 min read

Implement responsive image markup correctly so each device downloads the right file size without harming quality.

Social Media Image Sizes (Instagram, X, LinkedIn, Facebook)

12 min read

Use platform-ready dimensions and safe zones for social posts, link previews, ads, and carousels.

Product Image SEO for Ecommerce

12 min read

Improve ecommerce image visibility with practical naming, alt text, variant, and faceted navigation rules.

Resize Images for Shopify and WooCommerce

8 min read

Prepare Shopify and WooCommerce images with consistent sizing, better quality, and faster load times.

What You Can Do with Image Resizer

Resize assets for product pages, social posts, emails, and CMS uploads without losing layout control.

Pixel & Percentage

Resize by exact pixel dimensions or by percentage of the original image.

Aspect Ratio Lock

Keep original proportions to prevent stretching or squashing.

Batch Processing

Resize multiple files in one run to speed up production workflows.

What is Image Resizing?

Image resizing is the process of changing the display dimensions (width and height) of an image. This can involve making an image smaller (downscaling) to reduce file size and fit specific layouts, or making it larger (upscaling), though upscaling can sometimes reduce quality.

Common reasons to resize images include preparing them for websites (faster load times, fitting designs), email attachments (size limits), social media posts (optimal dimensions), or print (specific resolution requirements). Maintaining the aspect ratio is crucial to prevent images from looking stretched or squashed.

Supported Input Formats

Our Image Resizer works with a variety of common image formats. You can upload:

JPEG (.jpg, .jpeg) - Ideal for photographs.
PNG (.png) - Great for graphics, logos, and images needing transparency.
WebP (.webp) - Modern format offering excellent compression and quality for web use.
GIF (.gif) - Commonly used for simple animations and graphics. Animated GIFs will retain their animation after resizing.
BMP (.bmp) - Basic bitmap format.
AVIF (.avif) - A new, highly efficient format for web images.

The output image will typically be in the same format as the input. This tool focuses specifically on changing dimensions. If you need to convert formats, please use our Image Format Converter.

Guidance on Choosing Dimensions

Choosing the right dimensions for your resized image depends heavily on its final use. For websites, consider the layout and common screen sizes. Widths like 800px (for content images), 1200px (for wider content or small banners), or 1920px (for full-width hero images) are often good starting points. Remember, it's generally better to resize an image slightly larger and let the browser scale it down than to upscale a very small image, which can lead to a loss of quality.

Social Media Examples:

Social media platforms have their own optimal dimensions which can change over time. Here are some common examples (always check the platform's latest guidelines for best results):

Instagram:
- Square Posts: 1080 x 1080 pixels
- Portrait Posts: 1080 x 1350 pixels
- Landscape Posts: 1080 x 566 pixels
- Stories/Reels: 1080 x 1920 pixels (9:16 aspect ratio)
Facebook:
- Feed Posts: 1200 x 630 pixels (recommended), Square: 1080 x 1080 pixels
- Cover Photo: 851 x 315 pixels (desktop), 640 x 360 (mobile)
X (formerly Twitter):
- In-stream photos: 1600 x 900 pixels (16:9) or 1024 x 512 (2:1)
- Profile Photo: 400 x 400 pixels
LinkedIn:
- Post Image: 1200 x 627 pixels (recommended)
- Company Logo: 300 x 300 pixels

Email & Other Uses:

For images in emails, aim for widths under 800px and optimize the file size to ensure good deliverability and fast loading. If preparing images for print, you'll need to consider DPI (dots per inch) and the physical size required, which involves different calculations than screen pixel dimensions.

Tip: When in doubt, it's always a good idea to consult the specific requirements or style guides of the platform or medium where you'll be using the image.

Frequently Asked Questions

: You can resize common image formats like JPG, PNG, WebP, GIF, BMP and AVIF. The output format will be the same as the input unless you use our separate Image Converter tool.
: Enable "Maintain Aspect Ratio." When active, entering width auto-calculates height (and vice-versa) so images keep original proportions.
: Yes. Use "Pixels" for exact dimensions or "Percentage" to scale relative to the original image size.
: To ensure optimal performance and prevent overly large images, output images are capped at a maximum dimension of 10000 pixels for both width and height. If your settings result in dimensions exceeding this, they will be automatically adjusted down to this limit while maintaining your chosen aspect ratio settings. You'll see a 'Capped to max dimension' message on the image card if this adjustment occurs.
: Each file is resized using its own original proportions. Your target dimensions act as a bounding box, so images fit without distortion.
: Downscaling usually preserves quality well. Upscaling can soften details or cause pixelation, so start with the highest-resolution source available.
: Files are processed temporarily, then automatically deleted shortly after processing or inactivity. See our Privacy Policy.
: Yes, you can resize animated GIFs. Our tool will preserve the animation, applying the resize operation to all frames of the GIF.
: Resizing changes pixel dimensions, which often lowers file size. Compression is separate and optimizes image data itself. For maximum size reduction, run outputs through Image Compressor.