Free Online Image Compressor & MB to KB Photo Size Converter
Compress image size in KB or convert MB to KB instantly without losing quality. Lock exact KB targets, width & height in pixels for exam forms, passport photos & web uploads.
Choose Image or Drop Here
Supports JPG, PNG & WebP · 100% Private Browser Processing
Popular KB Photo Size Converters
Direct access to the 12 most-used photo size converters for exam & government portals.
15KB Photo & Signature Reducer
140×60 px JPG for SSC, IBPS & Government Exam Forms
20KB Exam Photo & Signature Compressor
SSC CGL, SBI, IBPS PO & UPSC Form Uploads
150KB NEET & JEE Photo Converter
Postcard Photos (4×6 in) & Document Scans in JPG
10KB Photo & Thumb Impression Reducer
Exact 10KB JPG with Pixel Clarity for Thumb Scans
50KB Passport Photo Reducer
200×230 px (3.5×4.5 cm) for Visa & Official Portals
100KB Document & Form Compressor
Certificates, Marksheets & ID Photo Scans under 100KB
30KB Online Photo Reducer
Banking KYC, College Admissions & Application Photos
25KB Exam Photo Reducer
Sharper Skin Tones & Clear Text for Online Applications
5KB Low-Bandwidth Photo Reducer
Aggressive Compression for Ultra-Strict Upload Limits
180KB Application Photo Resizer
Preserve High Resolution Detail under 180KB Limit
PAN Card Photo Resizer
Exact 213×213 px 300 DPI Photo & Signature for NSDL/UTIITSL
WebP Image Compressor
Compress WebP Files with 30% Smaller Size than JPEG
MB to KB Converter & File Size Reducer Online
Modern smartphone cameras and digital DSLRs produce high-resolution photos that weigh between 2 MB and 10 MB. However, virtually every Indian competitive exam portal (SSC, IBPS, SBI, UPSC, NEET, JEE), government visa application, and job portal strictly rejects photos larger than 15 KB, 20 KB, 50 KB, or 100 KB.
Our free MB to KB converter solves this friction immediately. Instead of guessing quality sliders in complex photo editing software, you simply type your desired kilobyte number or click a preset chip. Our algorithm analyzes image dimensions and color gradients to reduce file size up to 95% while preserving crisp facial features, signatures, and document text.
1. MB to Exact KB
Transform a 4MB smartphone photo into an exact 15KB or 20KB JPG in less than 2 seconds.
2. Pixel & Dimension Lock
Specify exact width & height in pixels (e.g., 140×60 px for signatures or 200×230 px for photos).
3. 100% Device Privacy
Your private identification documents and photos are processed in memory and never uploaded to remote servers.
Common Exam & Application Size Conversion Thresholds
| Application / Portal | Target Size | Dimensions (px) | Dedicated Tool |
|---|---|---|---|
| SSC CGL / CHSL / MTS Signature | 10 KB – 20 KB | 140 × 60 px | 20KB Reducer → |
| IBPS / Bank Exam Signature | 10 KB – 20 KB | 140 × 60 px | 15KB Reducer → |
| Left Thumb Impression | 10 KB – 20 KB | 240 × 240 px | 10KB Reducer → |
| Passport Photograph (Bank/Govt) | 20 KB – 50 KB | 200 × 230 px | 50KB Reducer → |
| NEET / JEE Postcard Photo | 50 KB – 150 KB | 400 × 600 px (4" × 6") | 150KB Reducer → |
| PAN Card Photo & Signature | Under 50 KB | 213 × 213 px | PAN Card Resizer → |
Why Choose CompressImg for Photo Size Reduction
Instant Local Processing
Zero network latency. Files are compressed locally on your smartphone or PC utilizing hardware-accelerated HTML5 Canvas.
Guaranteed Privacy
Your sensitive Aadhaar, passport, and exam photos are never uploaded or stored on any server.
Precise Dimension Control
Set custom width and height in pixels along with target KB to satisfy strict government form validators.
Frequently Asked Questions
Common questions about online image compression, MB to KB conversion, and form photo requirements.
How to convert MB to KB photo size online?
Upload your photo (e.g., 2MB to 10MB JPG/PNG) to CompressImg, set your required size (like 15KB, 20KB, 50KB, or 100KB), and click compress. The tool optimizes color and resolution in under a second.
How do I resize signature to 10 to 20 KB in JPG?
For SSC, IBPS, and SBI exams, click our '10–20KB Exam Signature' preset. It automatically locks dimensions to 140×60 px and compresses your signature to between 10 KB and 20 KB JPG.
What is 15KB photo size width and height in pixels?
Exam portals commonly specify 15KB signatures at 140 × 60 pixels (4 cm × 2 cm) and 15KB applicant photos at 200 × 230 pixels (3.5 cm × 4.5 cm). You can input both pixel dimensions directly into our tool.
Will compression make my photo blurry or unreadable?
No. Our algorithm uses intelligent step-down quality optimization that preserves crisp contrast on text and facial features while discarding unneeded metadata.
Can I use CompressImg on Android and iPhone without an app?
Yes! CompressImg is 100% mobile-friendly and operates directly in Chrome, Safari, and other mobile browsers without installing any application.