Image Size Resizer

Resize and compress images to exactly 20KB or any target file size with this free online tool.

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5,304+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Image Size Resizer processes input data instantly inside your browser.

Sample Input Birth date: Jan 15, 1995, Target date: Oct 20, 2023

Computed Result Chronological Age: 28 Years, 9 Months, 5 Days (10,505 days elapsed)

Execution Mode Client-Side In-Browser JS

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About This Tool

This image resizer tool allows you to upload any image (JPG, PNG, WebP) and resize it to exactly 20KB or any target file size you specify. The tool uses client-side processing with the HTML5 Canvas API to maintain privacy - your images never leave your browser. You can adjust the quality and dimensions to achieve the perfect balance between file size and visual quality. The tool is completely free with no upload limits and works directly in your browser.

Save your calculation history with a free account

How to Use

Upload an image using the file upload area or click to browse
Set your target file size (default is 20KB)
Choose your output format (JPG, PNG, or WebP)
Click the 'Resize Image' button to process
Download your resized image from the results page
If needed, adjust the target size and try again

Frequently Asked Questions

Find Quick Answers

How does this tool resize images to exactly 20KB?

The tool uses an iterative compression algorithm that adjusts the image quality and dimensions until the file size matches your target. It starts with high quality and gradually reduces it until the desired size is achieved.

Are my images uploaded to a server?

No, all processing happens locally in your browser using JavaScript and the Canvas API. Your images never leave your computer, ensuring complete privacy.

What image formats are supported?

The tool supports JPG, PNG, and WebP formats for both input and output. You can convert between formats during the resizing process.

Is there a file size limit for uploads?

No, there are no artificial limits. However, very large images may take longer to process depending on your device's capabilities.

Can I resize to sizes other than 20KB?

Yes, you can set any target file size in kilobytes. The default is 20KB but you can change it to any value you need.

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