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
Phone-scanned worksheets blow past Blackboard’s common ~10 MB limit. This page locks a grayscale Screen preset so typical Ultra submissions go through without sending your work to a public compress site.
Drop your PDF files here
or click to browse · Up to 20 files at once
Graded work belongs in Blackboard, not on a third-party compress server. This page prepares a smaller PDF on your computer with a homework preset (grayscale Screen) aimed at the ~10 MB ceiling many Ultra courses still use.
Stylus markups and camera scans never leave your device during the shrink. You download, then submit into Blackboard yourself.
That browser-only path keeps student work out of unknown compress SaaS logs while you chase the course quota.
Tablet markups and phone photos inflate PDFs faster than students expect. Blackboard Learn / Ultra courses frequently sit near a 10 MB assignment cap — larger than Canvas’s harsh 5 MB default, still small for color photo packets.
Apple Pencil layers and annotation streams add invisible bloat on top of the page images. Removing that stream while converting to grayscale is usually what clears the upload dialog.
Admins can change quotas per course, so treat 10 MB as a common real-world target, not a universal Blackboard law.
| Problem it solves | Blackboard upload limit / file exceeds maximum |
|---|---|
| Size check | 10 MB typical Ultra-style quota |
| Preset | Screen + grayscale for phone scans |
| Stylus markups | Annotation data stripped to cut bloat |
| Privacy | Local compress → you upload to Blackboard |
| Sister pages | Canvas (5 MB) · Moodle (color kept) |
We force grayscale here because most rejected Blackboard homework is readable in gray. Annotation streams from stylus apps get stripped so the file stops carrying unused markup weight.
Need color schematics for an engineering course? Prefer Moodle mode on this site (color kept) or unlocked Compress PDF after you confirm a higher course limit — fighting color through a 10 MB gray-biased checker is the wrong fight.
Ultra courses frequently sit near a 10 MB assignment cap — larger than Canvas’s harsh 5 MB default, still small for color photo packets packed with stylus layers.
We force grayscale here because most rejected Blackboard homework is readable in gray. Need color schematics? Prefer Moodle mode (color kept) or unlocked Compress PDF after you confirm a higher course limit.
Canvas users with a stricter cap should use Compress PDF for Canvas. Giant multi-lab PDFs belong in Split PDF before a second compress.
After you clear the size gate, other helpers on PDF tools can reorder pages if your instructor wants a specific packet order.
I keep this page because PDF attachment limits for Blackboard 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.