1. The Challenge of Strict Size Limits on Official Portals
When applying for government services, exams, or jobs, users are met with rigid document upload guidelines. Usually, the upload size must be kept under 200KB or 300KB. Typical scanner setups scan documents in high-resolution color, producing files of 5MB or larger. These are rejected by the servers. This guide explains how to resolve this issue easily.
1.1 Deciding on Compression Strategies
Standard compression programs often make files small by lowering image resolutions, which can make crucial data like birth dates, registration numbers, or stamps unreadable. Rejection rates for blurry documents are high. You need to compress the file size while preserving high legibility.
1.1.1 Legibility Requirements for OCR Engines
Many modern portals use automated Optical Character Recognition (OCR) systems to screen documents. If numbers are fuzzy, OCR fails, leading to instant rejections. Keep contrast high and boundaries sharp.
2. Processing Local Files Safely in the Browser
Privacy is key. Traditional online PDF tools upload your files to their cloud servers, which exposes your private details. Our browser-based compressor runs entirely locally using HTML5 canvas rendering and local WebAssembly. Your transcripts and identity papers never cross the internet.
2.1 Dynamic DPI Downscaling Method
Instead of degrading the image quality, our tool scales document resolutions down to a standardized 150 DPI. This maintains print readability while reducing the overall file size.
3. Step-by-Step Document Optimization Guide
Follow these steps to compress your files under the required limits:
3.1 Scanning and Compressing the Files
- Scan documents in black-and-white or grayscale mode to reduce data size from the start.
- Upload the PDF to our tool and select the target output size limit (e.g. \"Under 200KB\").
- Download the compressed file and inspect the quality before uploading to portals.
3.1.1 Double Checking Numbers and Seals
Before submission, zoom into the PDF at 100%. Check that official stamps, seals, and dates are legible to prevent rejection by verify agents.