Resize Image to KB

Automatically resize images to a specific file size in KB or MB

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Upload Image

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Drag & Drop Image

or click to select

Original Size: -
Dimensions: -
Target Size: -

Preview

Image preview will appear here

Target File Size

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Tip: Set a target size and the tool will automatically adjust quality and optionally dimensions to reach it.

About Resize to KB Tool

This tool automatically resizes images to reach a specific file size target. It adjusts quality and optionally dimensions to achieve the target size.

How to Use

  1. Upload an image by dragging and dropping or clicking the upload area
  2. Set your target file size (e.g., 500 KB or 2 MB)
  3. Choose output format (JPEG recommended for best compression)
  4. Enable "Allow Dimension Resize" if you want dimensions adjusted
  5. Click "Download Resized Image" to save

Use Cases

  • Email Attachments: Resize to 2-5 MB for email
  • Social Media: Resize to 500 KB - 2 MB for uploads
  • Website Hosting: Resize to specific limits
  • Cloud Storage: Optimize for storage quotas
  • Mobile Apps: Resize for app requirements

How It Works

  • First, it tries to reach target size by adjusting quality
  • If quality alone isn't enough, it resizes dimensions (if enabled)
  • JPEG format provides best compression for photos
  • Result may be slightly above or below target size

FAQ

Will the image look bad at small file sizes?
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Very small target sizes (under 100 KB) may result in visible quality loss. For best results, use 300 KB - 2 MB as target size.

What if the original is already smaller than target?
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The tool will keep the original file size. It only reduces, not enlarges.

Should I enable dimension resize?
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Enable it if you want to reach the target size even if it requires smaller dimensions. Disable it to keep original dimensions.

What's the best format for small file sizes?
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JPEG provides the best compression for photos. WebP is also good. PNG is larger but preserves transparency.