Many government, banking, and academic portal systems restrict file uploads for scanned marks cards, certificates, and ID documents to a maximum size of 300KB.
Compressing text-heavy documents can be tricky. Standard compression tools often decrease file size by applying a uniform blur, rendering small text impossible to read.
The Challenge of Document Legibility
When validation software reviews your certificate scans, it checks for clarity. Blurry text or distorted stamps can lead to automatic application rejections. To avoid this:
- Keep aspect ratios intact: Distorting height or width makes text unreadable.
- Reduce resolution first: Scaling a huge 4000px wide scan down to a web-friendly width (like 1200px or 1500px) reduces file size by 80% without introducing artifacts.
- Optimize JPEG quality: Compress with sub-sampling headers that prioritize text sharpness.
How to Use OptiKit for 300KB Compression
- 1
Open: Head to the OptiKit 300KB Resizer.
- 2
Select Document: Import your PNG, JPG, or PDF scan.
- 3
Compress: The tool uses browser canvas rendering to resample and compress the file safely below 300KB.
Secure Client-Side processing
Uploading sensitive academic records or certificates to standard converters is risky. OptiKit is fully client-side: the processing occurs right inside your browser window. No information is uploaded to a remote database, ensuring 100% privacy for your records.