DCPIXEL
すべてのツール

Exact KB Compressor

Reduce your image to exactly the KB size required by any form or upload system. 6 presets or custom KB input. Instant, browser-based.

3 free tries left for this tool todayStart free 3-day trial →

1. Upload Image

2. Target Size

Custom target100 KB

Upload an image and set a target size in KB

Whether your target is 50KB for a visa photo, 100KB for a government job portal, or 200KB for an academic admission form — DCPIXEL's smart compressor uses binary search to achieve the closest possible size below your target, maximizing image quality at that file size.

よくある質問 (FAQ)

How accurate is the file size target?
The tool uses a binary search algorithm that iterates compression quality until the output is within 1-2KB of your target. Accuracy is typically within 1KB for JPG and WebP formats.
Can I compress to any custom KB value?
Yes. Besides the preset options (20KB, 50KB, 100KB, 200KB, 500KB), you can type any custom target value in the input field.
What formats support exact-size compression?
JPG and WebP support precise size targeting via quality adjustment. PNG uses lossless compression so file size cannot be controlled as precisely — we convert it to optimized JPG for exact-size output.
Why do government portals require images under 100KB?
Online application portals (visa applications, college forms, tax submissions) have upload limits to reduce server storage costs and bandwidth. Our tool compresses while maintaining the minimum quality required for official document submission.

その他のツールも順次翻訳対応中です — 英語カタログにて全ツールをご利用いただけます。

すべてのツール →