How to Compress a PDF for Assignment Submission — Free
Learning systems (Canvas, Moodle, Blackboard) reject oversized PDFs right before the deadline. Here is how to shrink yours free.
Quick answer: compress on “Balanced” and confirm under your LMS cap (often 5–10MB). Files never leave your browser.
Real-world use — what we verified
A 14MB lab report with photos dropped to ~4MB on Balanced and uploaded to a 5MB Moodle cap. Honest note: image-heavy reports need High; text essays shrink on Balanced alone.
Common size limits
| Scenario | Stated limit | Safe target |
|---|---|---|
| Typical LMS cap | 5MB–20MB | under 5MB |
| Strict course settings | 2MB–5MB | under 2MB |
| Safe target | < 5MB | passes most |
Step-by-step
- Compress on “Balanced”.
- Check the size — aim under 5MB.
- Over a tight cap? Target 2MB.
- Submit before the deadline.
AdSense slot — configure js/ads.js
FAQ
What is the LMS file size limit?
Varies by course setting — commonly 5–20MB on Canvas/Moodle, sometimes 2–5MB. The assignment page shows it.
Will my figures stay readable?
On Balanced yes; if you must hit a 2MB cap with photos, use High and check the figures on screen.
PDF or DOCX for submission?
PDF locks your formatting. If the LMS accepts DOCX and your PDF will not fit, DOCX is often smaller.