Exact KB Image Compressor & Dimension Resizer

Binary search compression engine guarantees exact target file sizes in KB with crystal-clear facial sharpness and zero cloud upload.

Core Features

  • Exact KB Binary Search: Our engine iterates 12+ compression levels in RAM to achieve ±1KB precision.
  • Custom Dimension Units: Resize freely in Pixels (px), Centimeters (cm), Millimeters (mm), or Inches (in).
  • Side-by-Side Dual View: Compare original vs compressed output in real-time to ensure zero facial blur.
  • DPI Metadata Preservation: Embeds clean 200 DPI or 300 DPI metadata for strict portal validators.

How to use the Image Resize & Compress Tool

  1. Upload Your Image File

    Select any high-resolution photo from your phone, camera, or scanner.

  2. Set Target File Size (KB)

    Choose a quick preset (20KB, 50KB, 100KB, 200KB) or enter any custom KB.

  3. Adjust Width & Height (Optional)

    Lock aspect ratio or enter exact pixel/cm dimensions.

  4. Download Optimized Image

    Save your compressed image ready for instant portal upload.

Official Specifications

Supported Input
JPG, JPEG, PNG, WEBP, HEIC, BMP
Supported Output
JPG, PNG, WEBP
KB Precision
±1 KB exact convergence
Processing Speed
< 250 milliseconds in RAM

Frequently Asked Questions

How does this tool compress images to an exact KB size without making them blurry?

Standard compression tools use a simple quality slider (like 50% or 80%), which is guess-work and often results in either a file that is too large or severely pixelated. Our tool uses a real-time binary search algorithm that tests different quality coefficients inside your browser to hit your target file size (like exactly 48 KB for a 20–50 KB limit) while keeping facial edges and text crisp.

What is the difference between resizing dimensions (cm/px) and compressing file size (KB)?

Resizing changes the visual width and height of the image (for example, converting a large phone photo to 3.5 cm × 4.5 cm). Compressing reduces the storage file size in Kilobytes (KB) so it complies with portal upload restrictions. For exam portals, you usually need to do both: set the correct dimensions and ensure the file size falls within the mandated KB range.

Can I compress multiple photos at once?

Yes! Switch to "Batch Mode" at the top of the studio to upload up to 50 photos simultaneously, apply uniform dimensions or KB limits, and download all compressed files in a single zip archive.