What Is a Stream Overlay?
Stream overlays are visual elements layered on your stream — alerts, webcam frames, subtitles, and more. Learn how they work.
Add a Subtitle Overlay →Last updated: March 20, 2026
Quick Answer
A stream overlay is a graphic, widget, or animated element that appears on top of your stream video in real time. Common overlays include webcam borders, follower alerts, donation tickers, and subtitle overlays. They're added to OBS or Streamlabs as browser sources or image files.
Types of Stream Overlays
- Alert overlays: Follower/sub/donation pop-ups (StreamElements, Streamlabs)
- Webcam frames: Decorative borders around your camera
- Info panels: Social handles, donation goals, stream info
- Subtitle overlays: Real-time captions and translations (StreamTranslate)
- Scoreboard overlays: Live game scores for esports
- Now Playing: Current music with album art
How Overlays Work in OBS
In OBS, overlays are sources within a scene. Common types:
- Browser Source: Loads a URL — used for dynamic overlays (alerts, subtitles)
- Image Source: Static PNG with transparency
- Video Capture: Webcam — often paired with a frame overlay
Sources higher in the list appear on top. Overlays sit above your game/camera.
Subtitle Overlays: Growing Category
Subtitle overlays update in real time based on speech. The global live streaming market is projected to reach $247 billion by 2027 (Grand View Research). As competition grows, subtitle overlays become differentiators.
Frequently Asked Questions
Do overlays affect stream performance?
Minimal impact. Browser source overlays use hardware acceleration. Static image overlays have near-zero CPU cost.
Do overlays work on Kick and YouTube too?
Yes. OBS overlays are part of your broadcast output — included in video sent to any platform.
How is a subtitle overlay different?
Subtitle overlays update dynamically based on speech. Unlike static graphics, they display real-time transcribed or translated text.
StreamTranslate Team
Published by the StreamTranslate team. We build real-time live stream translation tools for Twitch, Kick, and YouTube, X, and TikTok streamers.
Add a real-time subtitle overlay
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