Convert Video To Pdf
Extract Audio From A Video
Overlay music spectrum bars, oscilloscope lines, or radial circular visualizers directly onto video frames. Perfect for podcast clips, music videos, and social media audio posts.
Uses browser Web Audio API FFT analysis to extract precise frequency bins and time-domain PCM waveforms synchronized frame-by-frame with your video audio track.
Switch between vertical frequency spectrum bars, smooth waveform oscilloscope lines, and radial circular spectrums with customizable bar counts and positions.
Choose solid neon colors, rich gradients (Cyberpunk, Sunset Fire, Emerald Electric), or beat-reactive mode that pulses color intensity on bass beats.
Place waveform overlays at the bottom, top, center, or floating corners. Customize bar height, opacity, glow, rounded caps, and background container padding.
All video audio analysis, canvas waveform rendering, and video export take place entirely inside your web browser. No files are uploaded to any server.
Frequently Asked Questions
SafeVideoKit extracts audio PCM data using Web Audio API to decode frequency spectrums and amplitude time-domain buffers. It then synchronizes visualizer frame drawing with the video frame timestamps.
You can select from Vertical Bars (spectrum equalizer), Waveform Line (oscilloscope), and Circular Spectrum (radial music equalizer with central badge).
Beat-reactive mode detects bass energy spikes (20Hz–250Hz sub-bass range) in real time. When a beat drops, the visualizer brightens, expands, and dynamic color shifts occur.
No. All audio decoding, canvas rendering, and video rendering happen 100% locally in your web browser for complete privacy and speed.
| Security | 100% (No files are sent to server for processing) |
| File size limits | None (No limit on size of files) |
| Usage limits | None (Process as many files as you want) |
| Price | Free |
| User Information Captured | None (We do not request for user information such as email / phone number) |
| Ads | None (We provide complete ad free experience) |
Over 200k Users Rely on Our Video Editing Tools Monthly
Join a growing community of users who rely on SafeVideoKit.com for secure, efficient, and easy-to-use video editing and processing tools. Enjoy privacy-focused features with no data uploads required.
