Mark it. Show it.
A lightning-fast, dark-first PDF annotator that disappears until you need it—and plugs straight into OBS, Stream Deck, vMix, or any WebSocket-friendly workflow.
- Stays invisible until you need it
- True dark-mode with neon highlights
- Direct OBS/Stream Deck integration
- <10 MB install, <80 MB RAM usage
Watch 2-minute demo
See Streamslate in action
Built for Creators
Every feature designed with streaming and content creation in mind
Annotations
Highlight, underline, free-ink, shapes, and call-outs
✅Dark-First UI
True inversion, neon palette that pops on camera
✅Presenter Mode
Borderless, transparent BG for clean streaming
✅OBS & Stream Deck
Hotkeys + WebSocket control for seamless workflow
✅Plug & Stream
Designed to work seamlessly with your existing streaming setup
OBS Studio
Add as Browser Source with auto-generated URL
Stream Deck
Control annotations with physical buttons
WebSocket API
Full control via local REST/WebSocket
Quick Start
$ streamslate MyDeck.pdf
Then add Browser Source in OBS:
http://localhost:11451/presenter
Ready to level up your streams?
Join thousands of creators using StreamSlate to engage their audience with crystal-clear annotations.