100KB Extension v1.1.1: Compress & resize files in 0ms directly in Google Chrome
Increase image size in KB online. Inflate JPEG and PNG photos to exact minimum KB limits securely. Optimized to to 300KB.
Using the Increase Image Size to 300KB to increase your file to exactly 300KB is a requirement for many platforms. This is a standard mid-range requirement for high-resolution passport photos, ID cards, and single-page scanned certificates. Our engine guarantees your final file will be processed to exactly 307,200 bytes while preserving legibility. Uploads falling below this 0.29 MB threshold will automatically be rejected by strict databases. While most portals enforce maximum file size limits, certain strict visa and public service commission portals enforce minimum file size limits (for example, requiring uploaded candidate photos to be at least 50KB or 100KB).
If your smartphone photo or scan is only 15KB or 25KB, uploading it will trigger an automated rejection. Our Increase Image Size tool applies non-destructive pixel padding and JPEG quality scale inflation to expand your image payload to your required minimum threshold without blurring or pixelating your face.
| Format | Quantization Engine | Color Space & Subsampling | Target Size Ceiling | Portal Acceptance |
|---|---|---|---|---|
| JPEG / JPG | Lossy 8x8 DCT Frequency Quantization | YCbCr (4:2:0 Subsampling) | 20KB – 500KB | 100% (Universal Exam & Visa Portals) |
| PNG | Lossless Deflate / LZ77 Filtering | RGB + 8-bit Alpha Channel | 100KB – 2MB | E-commerce, Logos & Digital Design |
| WEBP | VP8 Intra-frame Prediction | YCbCr 4:2:0 / Lossless | 15KB – 300KB | Modern Web Apps & Mobile Display |
Follow these simple steps to safely increase your file to 300KB.
Select the photo that is below the minimum size limit.
Type your required minimum file size (e.g. 50KB, 100KB). Increase 300KB.
Our engine adjusts quantization parameters to meet the target threshold.
Answers to common questions about increasing to 300KB.
Lead WebAssembly Systems Engineer at 100KB Tools. Technical specifications researched and cross-verified against official ICAO Doc 9303 Part 9 standards, ISO/IEC 10918-1 JPEG specifications, and PDF/A ISO 19005 guidelines.
Reduce image file size in KB or MB online. Compress JPG, PNG, and WebP files securely without changing dimensions.
Resize image dimensions in pixels, mm, cm, or inches online. Crop photos in circle, square, or rounded corner shapes.
Convert PNG and WebP images to JPG format online instantly. Compress file size to target KB limits for form uploads.