How accurate is the target file size?

The tool uses binary search with up to 20 iterations to find the JPEG quality that produces a file size within 1% of your target. In most cases, the result is within a few KB of the target.

What image formats are supported?

You can upload JPG, PNG, and WebP images. The compressed output is always in JPEG format since JPEG allows quality-based compression for precise file size control.

Why is the output always JPEG?

JPEG compression allows fine-grained quality control (1-100%), making it possible to target a specific file size. PNG uses lossless compression and does not support quality-based size targeting.

What if my target size is too small?

If the target is very small (e.g., 5 KB for a large image), the tool will compress to the lowest possible quality. The result may be visually degraded but will be as close to the target as possible.

Are my images uploaded to a server?

No. All compression happens in your browser using the Canvas API. Your images never leave your device, ensuring complete privacy.

Compress Image to KB

Compress any image to an exact target file size in KB — 50 KB, 100 KB, 200 KB, or any custom size.

Drag & drop your image here or browse

JPG, PNG, WebP — max 25 MB

How Compress Image to Exact KB Works

This tool lets you compress any image to an exact target file size in KB. Whether you need to compress an image to 50 KB, 100 KB, or 200 KB for form uploads, email attachments, or website requirements, this tool finds the precise JPEG quality setting to match your target.

How it works: The tool uses a binary search algorithm on the JPEG quality parameter (ranging from 1% to 100%). It draws your image on an HTML5 Canvas and repeatedly exports it with different quality values, narrowing down in up to 20 iterations to find the quality that produces a file size closest to your target KB.

Privacy: All processing happens entirely in your browser. Your images are never uploaded to any server.

Compress Image to KB का उपयोग कैसे करें

1
Upload an image by dragging and dropping or clicking the upload area.
2
Enter your desired target file size in KB (e.g., 50, 100, 200).
3
Click "Compress" to start the binary search compression.
4
View the result: compressed size, quality used, reduction percentage, and iterations.
5
Download the compressed image with one click.

Compress Image to KB के बारे में

Compress any image to an exact target file size in KB with our free online tool. Need to compress an image to exactly 50 KB, 100 KB, or 200 KB for a form upload, email attachment, or website requirement? This tool uses a smart binary search algorithm to find the perfect JPEG quality setting that produces a file as close as possible to your target size.

Upload your JPG, PNG, or WebP image, enter your desired file size in KB, and the tool automatically iterates through quality levels (up to 20 iterations) to find the closest match. You get full details: the resulting file size, JPEG quality used, compression percentage, and iteration count.

All processing happens entirely in your browser using the HTML5 Canvas API — your images are never uploaded to any server. No watermarks, no signup, no limits. Perfect for government form uploads, job applications, passport photo submissions, and any scenario where exact file size matters.