Resize JPG, JPEG, PNG and WebP images online for free. Change image dimensions, preserve the original aspect ratio, use preset sizes, adjust output quality and download your resized images directly from your browser.
Resized Images
What Is an Image Resizer?
An image resizer changes the pixel dimensions of an image. For example, a 4000 × 3000 pixel photo can be resized to 1600 × 1200 pixels. Reducing dimensions often produces a smaller file and makes an image more suitable for websites, social media, documents and online forms.
This Image Resizer processes images locally inside your browser. Your uploaded images are not sent to a server for conversion.
How to Resize an Image
- Select one or more JPG, PNG or WebP images.
- Choose Custom Dimensions, Percentage or Preset Size.
- Enter your target dimensions or select a preset.
- Keep aspect ratio enabled if you want to prevent stretching.
- Select the desired output format.
- Adjust quality for JPG or WebP when needed.
- Select Resize Images.
- Preview the results and download individual images or all results.
Image Resize Options Explained
| Option | What It Does | Best Use |
|---|---|---|
| Custom Dimensions | Sets target width and height in pixels. | Specific website or document dimensions. |
| Percentage | Scales each image by a selected percentage. | Quick proportional resizing. |
| Preset Size | Uses common width and height combinations. | Social media, websites and common display sizes. |
| Keep Aspect Ratio | Prevents the image from becoming stretched or squashed. | Photos and graphics where proportions matter. |
| Output Format | Converts the resized image to JPG, PNG or WebP. | Choosing a format suited to your final use. |
| Quality | Controls JPG and WebP output quality. | Balancing visual quality and file size. |
Why Keep the Aspect Ratio?
An image has a width-to-height relationship called its aspect ratio. Changing width and height independently often makes people, buildings, products and other objects look stretched or compressed.
For example, a 1600 × 1200 image has a 4:3 aspect ratio. Reducing the width to 800 pixels while keeping the ratio produces 800 × 600 pixels. The image becomes smaller while keeping its original proportions.
Image Resizing Examples
Example 1: Resize a Large Photo
Suppose a phone photo measures 4000 × 3000 pixels. You need a smaller version for a website. Set the target box to 1600 × 1200 pixels and keep aspect ratio enabled. The resulting image fits within the selected dimensions without distortion.
Example 2: Resize by Percentage
A 3000 × 2000 pixel image resized to 50% becomes 1500 × 1000 pixels. Percentage resizing is useful when you want a proportional reduction without calculating new dimensions manually.
Example 3: Prepare an Image for Social Media
For a square graphic, select the 1080 × 1080 preset. For a vertical social image, select 1080 × 1350. Keep aspect ratio enabled when the original image does not match the selected proportions. The tool fits the image inside the target dimensions rather than cropping it.
Image Resizing vs Compression vs Cropping
| Process | Main Change | Example |
|---|---|---|
| Resizing | Changes pixel dimensions. | 4000 × 3000 to 1600 × 1200. |
| Compression | Reduces file size by changing image encoding or quality. | 4 MB photo to 900 KB. |
| Cropping | Removes part of the image. | Wide photo changed to a square composition. |
JPG, PNG or WebP?
JPG
JPG works well for photographs and many website images. It offers good compression and broad compatibility.
PNG
PNG works well for graphics, screenshots, logos and images requiring transparency. PNG files often become larger than JPG files for photographic content.
WebP
WebP provides a modern image format with support for lossy and lossless compression. It works well for many websites and web applications.
Privacy and Browser Processing
This tool performs image resizing inside your browser using standard browser image and canvas functions. No image upload service or external image-processing API is required for the conversion.
Frequently Asked Questions
Is this Image Resizer free?
Yes. The tool is designed for free browser-based image resizing.
Does the Image Resizer upload my images?
No. Image processing happens inside your browser. The tool does not require an image-processing API.
Which image formats are supported?
The tool accepts JPG, JPEG, PNG and WebP images.
Can I resize multiple images at once?
Yes. Select multiple supported images and apply the same resize settings to the selected files.
How do I resize an image without stretching it?
Enable the Keep each image's original aspect ratio option. The image will fit within the target dimensions without changing its proportions.
Does resizing reduce image quality?
Reducing dimensions removes some pixel information, so a smaller image contains less detail than the original. JPG and WebP output quality also affects the final result.
Can I convert JPG to PNG or WebP while resizing?
Yes. Select JPG, PNG or WebP from the Output Format menu before resizing.
Why is my resized file still large?
Pixel dimensions are only one factor affecting file size. Image format, quality, detail and compression also affect the final file size.
