Multi-track timeline editor, AI transcription, voice synthesis, and 4K export — all running directly in your browser. No installs, no subscriptions.
Watch the full demo reel — from audio import to 4K export in under 3 minutes.
From real-time visualizers to AI-powered voice tools — Spectrum Studio Pro has it all, right inside Chrome.
Drop in your audio and watch it come alive. Spectrum Studio renders stunning real-time visualizations synced perfectly to every beat, bass hit, and frequency.
Add beautiful overlay cards to your timeline with titles, descriptions, and avatars. Then bring them to life with one-click AI voice narration using ElevenLabs.
Place character avatars and speech-bubble callouts anywhere on the canvas. Perfect for explainer videos, IVR simulations, and dialogue-driven content.
Add smooth, eased camera zoom movements to any moment in your timeline. Guide the viewer's eye with precision — no video editing experience required.
Tilt, rotate, and warp the canvas in 3D space — like a cinematic camera operator on a rig. Animate pitch, depth of field, and focus point over time.
Set the mood with stunning animated backgrounds that pulse and flow behind all your content layers. From minimal gradients to full particle systems.
Import audio and let the AI build your entire production for you. Cards, callouts, waveforms, and avatars — all created automatically from your audio in seconds.
Transcribe any audio entirely inside your browser using open-source Whisper models — no internet required, no API key, no cost. Your audio never leaves your device.
Replace or transform voices in your audio using ElevenLabs. Keep the timing and emotion — swap the voice entirely. Perfect for dubbing, character voices, and demos.
Type text on any card or callout and instantly generate a natural-sounding voice-over. Choose from hundreds of AI voices via ElevenLabs.
Start free. Upgrade once. Own it forever.
Yes. Spectrum Studio Pro is a Chrome extension and runs on any operating system that supports Google Chrome.
No. All audio processing, AI transcription (Whisper), and rendering happens entirely within your browser. Your files never leave your device.
Free gives you the full editing experience including AI transcription, all visual effects, and 1080p export. Pro unlocks 4K/60fps/HDR10 export, Zoom & 3D Perspective export, and ElevenLabs voice features.
Only if you want to use the AI voice features. You supply your own API key — we never store it on any server. AI transcription with Whisper is fully free and requires no third-party account.
No — it's a one-time purchase of $4.99 USD. Pay once, use forever. No recurring charges.
Default export is H.264 MP4. With HDR10 enabled (Pro), it exports HEVC (H.265) MP4 with BT.2020/PQ for HDR displays. Multiple aspect ratios supported including 16:9, 9:16, 1:1, and ultrawide.
Your data stays with you. Here's exactly how Spectrum Studio Pro handles your information.
Spectrum Studio Pro ("the Extension") is a browser-based audio visualizer, multi-track timeline editor, and video production tool. We are committed to protecting your privacy.
Spectrum Studio Pro does not collect, transmit, or share any personal information.
The Extension uses chrome.storage and localStorage solely to save your project settings, preferences, and API keys locally on your device. This data never leaves your browser.
Audio and video files you import are processed entirely within your browser using the Web Audio API and WebCodecs API. Your media files are never uploaded to any external server.
The optional AI transcription feature uses the open-source Whisper model loaded from jsDelivr CDN (cdn.jsdelivr.net). The model runs entirely in your browser — your audio is never sent to an external server.
If you activate a Pro license, your license key is sent to Polar.sh (api.polar.sh) to verify validity. No other personal data is transmitted. See Polar.sh privacy policy.
These integrations are entirely optional, require your own API keys, and are only triggered by explicit user action:
| Service | Domain | Purpose |
|---|---|---|
| ElevenLabs | api.elevenlabs.io | AI text-to-speech and voice replacement (Pro) |
| jsDelivr CDN | cdn.jsdelivr.net | Loads Whisper AI model for local transcription |
| Google Fonts | fonts.googleapis.com | UI typography — no personal data transmitted |
We may update this Privacy Policy from time to time. Changes will be reflected on this page with an updated date.
Questions? Contact us via the Chrome Web Store listing.