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Resize Image to Specific KB or MB Online

Reduce image file size to a target KB or MB using adjustable JPEG compression and automatic dimension reduction when necessary. Compare the original and compressed image, check the achieved file size, dimensions, and quality, and download the optimized image.

📂 Drag & Drop or Click to Upload Image

Supports JPG, PNG, WEBP (Maximum file size: 20MB)
15 KB
20 KB
30 KB
50 KB
100 KB
150 KB
200 KB
500 KB
1 MB
2 MB
Original File 0 KB
Target Limit 100 KB
Final Weight 0 KB
Final Dimensions -
Quality Applied -

Original Upload (-)

Original uploaded image

Compressed Result (-)

Compressed image preview

Notice: The requested file size operates as a maximum threshold. To reliably compress high-resolution images down to small targets (such as 20KB or 50KB), the tool preserves original dimensions where possible and automatically downscales canvas resolution if quality reduction alone is insufficient. Output is exported as standard JPEG.

Download Resized Image

Related Image Utilities

Image Size Reducer (KB/MB) vs. Image Resizer (Pixels)

Salaried job portals, public service exams (UPSC, SSC, State PSC), and visa portals enforce strict file size caps—such as "Upload photograph between 20 KB and 50 KB". Understanding how file weight relates to pixel resolution is crucial for successful submission:

  • Target-Size Reducer (This Tool): Adjusts internal JPEG compression tables and progressively scales pixel dimensions until the file weighs less than or equal to your specified KB or MB target.
  • Pixel Dimension Resizer: Changes width and height to explicit values (e.g., 600×600 px or 6cm×2cm) regardless of what the final file weight becomes.
  • Quality Compressor: Applies a fixed lossy compression slider without targeting a specific numeric KB cap.

Supported Formats & Technical Considerations

  • Supported Inputs: JPG, JPEG, PNG, and modern WEBP images up to 20MB.
  • Output Format: All outputs are generated as standard JPEGs. If you upload a transparent PNG, the transparent areas will be drawn onto a clean white background, ensuring compatibility with strict government document portals.
  • Client-Side Execution: All canvas operations, binary quality searches, and dimension scaling run directly inside your web browser. No photos are uploaded to our servers, protecting the privacy of personal ID cards and signatures.

Frequently Asked Questions (FAQ)

1. How do I resize an image to 20KB or 50KB?

Upload your image, click the 20 KB or 50 KB preset chip (or enter your custom value), and click Resize to Target. The algorithm iteratively balances JPEG quality and dimension scaling to generate a compliant image below your cap.

2. Why did my image dimensions decrease?

High-resolution photos from modern smartphones (often 12–48 megapixels) carry so much raw data that reducing JPEG quality to minimum still produces a file exceeding 30–50 KB. When this floor is reached, our tool automatically downscales dimensions proportionately to guarantee that the final file fits your target.

3. Can I compress pictures without losing quality?

Targeting severe file reductions (e.g., shrinking a 4MB picture to 50KB) is inherently lossy. However, because our tool optimizes JPEG quantization tables and scales dimensions cleanly, the image remains sharp and legible for screen display and government documents.