Drop your PDF files here
or click to browse · Up to 20 files at once
PDFMax ~100MB per file
No upload · 100% private
All tools
Stuck on a Canvas assignment upload? Many courses cap files at 5 MB. This page starts in a homework-friendly Screen + grayscale preset and warns you before the LMS rejects the file.
Drop your PDF files here
or click to browse · Up to 20 files at once
Canvas upload errors are stressful enough without dropping a graded PDF on a random “free compressor.” Here your assignment stays on the device: we only change how pages are re-saved so a common 5 MB course limit has a fair chance of accepting it.
Student IDs and handwritten pages never transit through our servers — you download, then upload into Canvas yourself.
Close the tab when you finish. Nothing is retained on VeloTools because nothing was uploaded in the first place.
Many Canvas courses still ship with a default upload ceiling near 5 MB. That number feels generous until you photograph a worksheet in full color at twelve megapixels — one page can burn the entire quota.
Instructors rarely raise the limit mid-semester. Students then bounce between “file too large” banners and third-party compress sites that ask for an account. The safer path is a local grayscale Screen pass aimed at tonight’s deadline, not a portfolio print.
This page assumes that failure mode on purpose so SpeedGrader still receives something readable after you clear the size check.
| Problem it solves | Canvas file too large / assignment upload failed |
|---|---|
| Size check | 5 MB (common course default) |
| Preset | Screen quality for phone scans |
| Color | Grayscale (cuts size on worksheet photos) |
| Privacy | Local only — you upload to Canvas |
| When to switch | Color diagrams → main Compress PDF |
Homework scans rarely need color fidelity. Forcing grayscale and a Screen DPI target removes the bulk of camera JPEG waste while keeping pencil strokes legible when a TA zooms in SpeedGrader.
If your instructor explicitly wants color figures and raised the course cap, leave this page and use a milder unlocked preset elsewhere — do not fight a 5 MB checker with rainbow pages.
Students photograph worksheets in full color at 12 megapixels. Canvas courses often still use a small default upload cap near 5 MB. One photo page can burn the whole quota.
This URL assumes that failure mode on purpose: grayscale + lower resolution for “get it submitted tonight,” not for a printed portfolio. If your instructor raised the limit and you need color figures, use Compress PDF with a milder preset instead.
Need a smaller sibling for another LMS? See Blackboard or Moodle — each locks a different tradeoff. To break a giant scan into parts, open Split PDF.
More PDF helpers live under PDF tools if you need to reorder pages after shrinking for Canvas.
I keep this page because PDF attachment limits for Canvas kept failing with upload tools or generic presets. Here you pick the Screen/Web preset that fits the channel, compress locally, then attach. Limits and architecture are documented in Lab Notes — this URL is a micro-instrument for one job, not a keyword clone.