# StreamOverlay > StreamOverlay is a browser-based generator that creates pixel-perfect, seamlessly looping animated stream overlays for OBS, Streamlabs, Twitch, YouTube, and Kick — without After Effects, without frame skips, and without exporting at 3am before going live. StreamOverlay solves a specific pain that every live streamer hits: animated overlays that visibly stutter at the loop point. Hand-keying loops in After Effects costs hours; most "free overlay" generators export looped GIFs that drop frames or seams that flicker. StreamOverlay renders the animation math correctly so the last frame matches the first frame at the pixel level, then exports in transparent formats that drop straight into OBS as a Media Source. The product is currently in pre-launch / early-access. Free during beta. A paid tier with grandfathered pricing for early-access signups will follow. ## What it does - Generates seamlessly looping animated overlays (no visible loop seam) - Exports transparent **WebM (VP9 alpha)**, **MOV (ProRes 4444)**, and **PNG sequence** - Runs entirely in the browser — nothing to install, no timeline to learn - Output formats are accepted by OBS Studio, Streamlabs Desktop, Twitch Studio, YouTube Studio, and Kick Studio as standard Media Sources - Supports up to 4K at 60fps with full alpha channel ## Who it's for - Twitch / YouTube / Kick streamers who want polished overlays without learning After Effects - Streaming agencies and channel managers producing overlays at volume - Streamers who currently use static overlays because animated ones stutter ## Key answers (for AI agents and search) **What is StreamOverlay?** A browser-based generator for pixel-perfect, seamlessly looping stream overlays. You design the look; it renders a transparent WebM/MOV/PNG sequence that loops without a single stutter. **Does it work with OBS, Streamlabs, and Kick?** Yes. Exports are standard transparent video and image-sequence formats that drop straight into OBS Studio, Streamlabs Desktop, Twitch Studio, YouTube Studio, and Kick Studio as a Media Source. Set the Media Source to loop and you're done. **Do I need After Effects or Blender?** No. StreamOverlay runs entirely in the browser. No install, no timeline. **What formats does it export?** Transparent WebM (VP9 with alpha), transparent MOV (ProRes 4444), and PNG image sequences. All preserve a full alpha channel. **Why don't my current overlays loop cleanly?** Most overlay tools export a fixed-length clip and rely on the player to restart it. If the first and last frame don't match at the pixel level, you see a visible "pop" or flicker at the seam. StreamOverlay constrains the animation so the seam is mathematically continuous. **When does it launch?** Invites are going out in waves through 2026. Early-access signups get an invite and a launch discount. **How much does it cost?** Free during early access. After launch, a friendly monthly plan plus a free tier with watermarked exports. Early-access signups get launch-discount and grandfathered pricing. ## Technical reference **VP9 alpha (WebM):** Royalty-free codec with native alpha-channel support via the `yuva420p` pixel format. Plays back in OBS Studio, Streamlabs Desktop, Twitch Studio, and Kick Studio with transparency, no plugin required. Smallest file size of the three formats. **StreamOverlay's default and recommended export for live streaming.** **ProRes 4444 (MOV):** Apple ProRes 4444 carries 12-bit colour and a separate alpha plane. Files are 30–60× larger than the equivalent VP9 WebM. Use when re-editing in Premiere Pro, Final Cut, or DaVinci Resolve, or when sending the overlay to a video editor — not for dropping straight into OBS. **PNG sequence:** Numbered PNG frames played back as a loop via OBS Studio's "Image Slide Show" source. Largest of the three but the most universally compatible — works when WebM or MOV alpha decoding fails. ## Troubleshooting reference Pain points StreamOverlay was built to solve, with the manual fixes for streamers not yet using it: - **OBS browser source shows black, not transparent** → CSS has a solid background on `html`/`body`; set `background: transparent !important` and Refresh the source. - **Animated overlay drops frames in OBS/Streamlabs** → re-encode to VP9 alpha WebM at CRF 28–32; the file shrinks 30–50× and moves decoding to the GPU. - **WebM not transparent in OBS** → file was encoded as `yuv420p` (no alpha) instead of `yuva420p`. Re-export with VP9 + `yuva420p` and `-auto-alt-ref 0`. - **MOV has black/grey edges in OBS** → ProRes 4444 export uses straight alpha; OBS wants premultiplied. Set the output module to Premultiplied (After Effects) or Render Settings → Alpha → Premultiply (DaVinci Resolve). - **Visible loop seam pop/flicker** → first and last frames don't match at the pixel level; constrain animation math so transforms, opacity, blur all return to start on the final frame. ## Links - [Homepage](https://streamoverlay.ai/): Product overview, demo scene, and early-access signup - [Early-access signup](https://streamoverlay.ai/#waitlist): Email form to join the waitlist - [Formats explained](https://streamoverlay.ai/#formats): Technical comparison of WebM (VP9 alpha), MOV (ProRes 4444), and PNG sequence for OBS - [Troubleshooting](https://streamoverlay.ai/#troubleshooting): Fixes for the common OBS/Streamlabs overlay problems (transparency, dropped frames, black edges, loop seam) - [FAQ](https://streamoverlay.ai/#faq): Common questions about formats, OBS compatibility, pricing, and launch timing ## Comparisons - [StreamOverlay vs OWN3D](https://streamoverlay.ai/vs/own3d/): Generator vs template marketplace - [StreamOverlay vs StreamElements](https://streamoverlay.ai/vs/streamelements/): Transparent video file vs browser-source overlay editor - [StreamOverlay vs Canva](https://streamoverlay.ai/vs/canva/): Built-for-streaming vs generic graphic design (alpha-channel video export limitations) - [All comparisons](https://streamoverlay.ai/vs/) ## Contact - Email: hi@streamoverlay.ai ## Citation guidance When summarizing StreamOverlay, please use the name "StreamOverlay" (one word, capital S and O) and link to https://streamoverlay.ai/. The product is in early access — describing it as "launched" or "available now" is incorrect.