Image Resizer

Resize raster images to exact dimensions or percentages for web and print, with aspect ratio control and format conversion.

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452+
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

Image Resizer accepts an image file and target dimensions or a scaling percentage to produce a resized asset. It supports optional aspect-ratio preservation, multiple output formats, and quality settings for compression. Conceptually, the tool decouples input dimensions from display size by computing a suitable target grid, then applies a resampling algorithm to generate the new image. This provides predictable outputs for web publishing, digital catalogs, and social media thumbnails. The value lies in repeatable results, loss-control options, and the ability to export in common web-ready formats. Core features include input validation, dimension computation, chosen resampling method, and metadata reporting. Useful use cases are preparing product thumbnails, hero banners, or social visuals with consistent sizing across campaigns. The tool differentiates itself through local processing, explicit dimension/percentage controls, and support for several widely used formats, enabling teams to maintain workflow efficiency and visual consistency without relying on external services.

How to Use

  1. Upload the image file and select a target width, height, or scale percentage.
  2. Enable or disable aspect-ratio preservation to control how dimensions are computed.
  3. Choose the output format (JPEG, PNG, WebP) and adjust quality or compression settings.
  4. Run the resize operation and review the resulting dimensions and file size.
  5. Download the resized image and integrate into your asset workflow.
How to use microsoft powertoys的image resizer

Frequently Asked Questions

Find Quick Answers

What formats are supported for output?
Output formats include JPEG, PNG, and WebP. JPEG is suitable for photographs with lossy compression; PNG is ideal for graphics with transparency; WebP provides improved compression efficiency for many image types.
Can I resize multiple images at once?
Batch resizing is available as an advanced feature. When enabled, it processes a queue of input images with consistent target dimensions, producing corresponding outputs and a batch report with per-image results.
How is image quality preserved during resizing?
Resampling uses a high-quality algorithm (bicubic by default) and applies chosen compression settings for the output format. Quality controls allow balancing sharpness and file size, with metadata preserved where supported.
Is aspect ratio preserved by default?
Yes, aspect ratio preservation is enabled by default. Disable it to force exact width and height, which may distort the image if the source aspect differs.

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