Compress PDF assignments for Moodle
Can't submit your assignment because it exceeds the Moodle size limit? Compress your heavy PDF report fast before the deadline.
Quick Answer
If your university limits assignment file sizes on Moodle, use a PDF compressor to shrink your files. Background imagery and chart resolutions are automatically optimized, making the PDF tiny enough to be uploaded successfully without changing the written text.
Drop your PDF here
or click to select a file
Latest update : March 24, 2026
How does it work?
Select your final PDF assignment or thesis file.
It gets compressed immediately without ruining text quality.
Submit the lighter file on your Moodle course page.
Optimization Guide
How does PDF compression work?
PDF compression uses WebAssembly technology to process your files directly in the browser. The algorithm reduces embedded image weight, removes unnecessary metadata, and optimizes the internal PDF structure.
Compression Quality Levels
Light
20-40% reduction. Ideal for documents with few images. Quality nearly identical to original.
Medium
40-60% reduction. Good balance between size and quality. Recommended for most uses.
Maximum
60-90% reduction. Perfect for email or messaging attachments. Images are more compressed.
Privacy & Security
Your files never leave your device. Processing happens entirely in your browser using WebAssembly. This is the ideal solution for sensitive documents.
Why compress your PDFs?
Up to 90% size reduction
Total privacy (local processing)
Visual quality preserved
Free without file limits
Frequently Asked Questions
Will the compressed PDF be compatible everywhere?
Yes, compressed PDFs remain in standard PDF format and open in all PDF readers (Adobe Reader, browsers, mobile apps, etc.).
How does PDF compression work?
Our tool uses advanced algorithms to optimize images, remove unnecessary metadata, and reorganize the internal PDF structure for minimal size while preserving visual quality.
Can I compress scanned PDFs?
Yes! Scanned PDFs are often very large and benefit greatly from compression. You can typically reduce their size by 50-80%.
Is this PDF compressor free?
Yes, our PDF compressor is completely free. No hidden fees, no registration required, and no file size limits.