Compress a PDF for Canvas

Stay under Canvas file-upload and course-storage limits by compressing your PDF before you post it.

Free · No signup · Files never leave your device

Canvas caps individual uploads and counts every file against your course storage quota. A folder of scanned readings or slide decks fills that quota fast. Compressing each PDF first keeps you under the limit and makes pages load quickly for students on any device.

How to do it

1

Open the compressor

Click the button above — the ClassPDF compress tool runs right in your browser.
2

Add your PDF

Choose the file. It is processed locally on your machine, never sent to a server.
3

Upload to Canvas

Download the smaller PDF and add it to your Canvas module, assignment, or Files.

Compress my PDF

Why teachers use ClassPDF

Private by design. Every file is processed in your browser and never uploaded — the right default for documents with student names or grades.
Fast and free. No signup, no watermarks, no file limits — just open the tool and go.
Built for the classroom. Made for real teacher workflows — worksheets, packets, scans, and LMS uploads.

Frequently asked questions

What is the Canvas file upload limit?

Limits vary by institution, but individual files are commonly capped (often around 500 MB) and everything counts toward your course storage. Compressing keeps large scans and slide exports well under both.

Does this work for Canvas assignments and modules?

Yes — a compressed PDF works anywhere Canvas accepts a file: assignments, modules, pages, and course files.

Do I need an account?

No. ClassPDF is free with no signup, and your file never leaves your device — useful for graded work and anything with student data.

Ready to try it?