Online Image Resizer - Resize JPG, PNG, WebP, GIF - PolishMyPixel
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

1

Upload Images

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

2

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.

3

Resize Images

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

4

Download Files

Download resized images individually or as a ZIP archive.

Upload Images to Resize

File Issues:

Uploading batch...

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

Resize Options

Select a common size, or choose Custom.

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

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

Download File Download ZIP ( )

Image Resizer: Key Features

Our Image Resizer offers a straightforward way to adjust the dimensions of your images quickly and efficiently.

Pixel & Percentage

Resize by specific pixel dimensions or by a percentage of the original size.

Aspect Ratio Lock

Easily maintain the original proportions of your images to avoid distortion.

Batch Processing

Upload and resize multiple images at once to save time.

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.
Select the "Maintain Aspect Ratio" checkbox. When checked, if you enter a width, the height will adjust automatically to keep the original proportions, and vice-versa. If unchecked, you can set width and height independently, which might stretch or squash the image.
Yes, you can choose your preferred unit. "Pixels" lets you define exact width and height. "Percentage" scales the image relative to its original dimensions (e.g., 50% will make it half the 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.
When you select 'Maintain Aspect Ratio' and set dimensions by pixels, each image is resized to fit within your specified target dimensions (e.g., 1000px width, 800px height) while keeping its own original aspect ratio. The aspect ratio of the first uploaded image is primarily used by the interface to help you dynamically calculate linked dimensions as you type in the width or height fields. However, during the actual resize process, each image is treated individually according to its own proportions to prevent distortion.
Reducing image dimensions (downscaling) generally maintains good quality. However, significantly enlarging images (upscaling) can lead to a loss of sharpness or pixelation, as the software has to interpolate new pixel data. It's always best to start with a high-resolution original if you need a larger version. Our resizer aims to prevent upscaling by default when "Maintain Aspect Ratio" is chosen and you provide dimensions larger than the original.
We prioritize your privacy. Uploaded files are processed securely and stored temporarily only for the resizing operation. All original and resized files are automatically and permanently deleted from our servers shortly after your session ends or after a brief period of inactivity.
Yes, you can resize animated GIFs. Our tool will preserve the animation, applying the resize operation to all frames of the GIF.
Resizing changes the number of pixels in your image (its width and height), which usually results in a smaller file size, especially when you make an image smaller. However, this is different from image compression, which specifically reduces file size by optimizing the image data itself, often without changing its dimensions. For maximum file size reduction after resizing, you might consider using our dedicated Image Compressor tool.