Tap along to any song to detect exact Beats Per Minute (BPM) with audio metronome and music production delay sync.

Calculate required video and audio bitrates to compress video files to a target size (Discord 25MB, YouTube, DVD).

Detect Beats Per Minute (BPM) by tapping any key and practice timing with an interactive visual metronome.

Calculate Exposure Value (EV 100), lux illumination, and equivalent shutter speed, aperture, and ISO combinations.

Calculate 35mm full-frame equivalent focal length, field of view (FOV), and equivalent depth of field across camera sensors.

Calculate compressed MP3/AAC and uncompressed WAV/FLAC audio file sizes from track duration and sample rate.

Calculate sound pressure level attenuation over distance using inverse-square acoustic laws and combine multiple sources.

Calculate letterbox/pillarbox padding pixels and copy ready-to-run FFmpeg scale/pad filter commands.

Calculate proportional pixel dimensions for 16:9, 4:3, 9:16, 21:9, and custom aspect ratios.

Synchronize delayed or advanced movie subtitles by shifting SRT and VTT timestamps in milliseconds.

Trim, cut, and slice MP3, WAV, AAC, and OGG audio files entirely in your browser.

Normalize peak volume, remove clipping, and amplify quiet audio tracks client-side.

Speed up or slow down audio playback from 0.25x to 4.0x with real-time browser preview.

Record high-quality voice notes and microphone audio directly in your browser.

Inspect technical audio specifications including duration, sample rate, channels, and bitrate.

Generate pure sine, square, sawtooth, and triangle audio frequencies in real time.

Merge multiple audio clips (MP3, WAV, AAC, OGG) sequentially into a unified audio file with 100% client-side privacy.

Detect and trim dead silence from audio recordings automatically based on customizable decibel thresholds.