Image Resizer

Resize images to exactly 250 KB or any target file size with quality and dimension controls

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5,336+

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 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 online image resizer tool allows you to resize any image to a specific target file size (default 250 KB). Upload your image, set your desired target file size, adjust quality if needed, and the tool will automatically calculate the optimal dimensions to achieve that file size while maintaining the original aspect ratio. Perfect for optimizing images for web, email, or social media where file size limits apply.

Save your calculation history with a free account

How to Use

Upload an image using the file upload area or drag-and-drop
Set your target file size in KB (default is 250 KB)
Adjust the quality slider if needed (higher quality = larger file)
Click 'Resize Image' to process
Download your resized image from the results section

Frequently Asked Questions

Find Quick Answers

What image formats are supported?

The tool supports JPEG, PNG, WebP, and GIF images. Output is always in JPEG format for optimal compression.

Will the aspect ratio be maintained?

Yes, the tool automatically maintains the original aspect ratio when resizing to prevent distortion.

What is the maximum image size I can upload?

You can upload images up to 10 MB. For larger images, consider using a desktop image editor first.

How accurate is the file size targeting?

The tool uses binary search algorithm to get within 1-2% of your target file size, though exact matches depend on image complexity.

Can I resize to sizes other than 250 KB?

Yes, you can set any target file size between 10 KB and 5 MB using the input field.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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