⚡ Offline Exact KB Workspace

Compress Image to Exact KB Online

Compress JPG, JPEG, PNG, and WEBP images to a specific file size in KB. Enter your required size, optimize the image, verify the actual output size, and download instantly.

Quick Presets:

Drag & Drop Image Here

Supports JPG, JPEG, PNG, WEBP · Up to 50 MB

🎯 Exact KB Target Settings

Target: Exact 50 KB
Required Reduction: approx 90%

Maximum Size mode ensures output is strictly under requested KB (ideal for government forms).

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100% Private Client-Side Tool

Your images are processed directly inside your browser. No files are uploaded to ReducerImage or any external server.

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Popular Targets

Popular KB Targets

Select your required target file size for quick one-click compression.

20 KB

Ideal for exam signatures & thumb impressions.

30 KB

Common for online job portals & certificates.

50 KB

Required for SSC, NEET, & UPSC candidate photos.

100 KB

Standard maximum size for admission & visa forms.

200 KB

Perfect for PDF attachments & official documents.

500 KB

High quality limit for email uploads & web graphics.

Engine Mechanics

How Exact KB Compression Works

Learn how browser-based binary search compression hits target file sizes cleanly.

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1. Multi-Pass Quality Search

Image algorithms cannot guess file size beforehand. Our engine uses a bounded binary search, running up to 14 encoding passes to converge on your target file size.

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2. Dimension Fallback

When quality compression alone cannot reach very small targets (like 20 KB), the engine scales pixel dimensions proportionally while protecting visual sharpness.

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3. Blob Size Verification

Every candidate is measured against actual binary Blob size in browser memory. You get verified output size reporting before downloading.

Application Portals

Government & Exam Use Cases

Engineered specifically to satisfy strict file size boundaries for online forms.

📋 SSC & UPSC Exams

Requires photograph between 20 KB and 50 KB, and signature between 10 KB and 20 KB.

🩺 NEET & JEE Portals

Demands candidate photo under 100 KB and postcard photo under 200 KB.

🛂 Passport & Visa Forms

Strict maximum size of 100 KB or 200 KB for passport photo uploads.

🪪 Aadhaar & PAN Cards

ID proof and signature documents restricted to maximum 50 KB or 100 KB.

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❓ Help Center

Frequently Asked Questions

Everything you need to know about exact KB image compression.

Can I compress an image to an exact KB size?
Yes! Simply upload your JPG, PNG, or WEBP photo above, enter your target size in KB (e.g. 20, 50, 100, 200), and click Compress. Our algorithm automatically optimizes quality and dimensions to hit your target.
The tool supports configurable tolerance ranges of ±0.5 KB, ±1 KB, ±2 KB, or ±5 KB. You can also select Maximum Size mode to ensure the output file size is strictly under your requested limit.
Exact KB mode attempts to match your target file size within a tight tolerance (e.g., 99KB to 101KB for a 100KB target). Maximum KB mode ensures your image file size is strictly at or below your target limit (e.g., ≤ 100KB), which is ideal for government and exam application portals.
Yes. Upload your photo, type 50 in the target input box, select 50 KB, and click Compress. The verification card will confirm the actual output size.
Very large high-resolution photos may require reducing pixel dimensions as well as image quality to reach targets like 20 KB or 30 KB. If quality floor settings prevent further compression, the tool transparently offers dimension reduction options.
No. All compression processing occurs 100% locally inside your web browser using HTML5 Canvas and Blob APIs. Your files never leave your device.
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