Audio, Video & Media

BPM tap tempo, pitch shift, audio/video bitrate calculators, frame rate duration, and SRT subtitle tools.

BPM Tap Tempo & Metronome Tool

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

audio-music

Audio & Video Bitrate Calculator

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

video-encoding

BPM Tap Tempo & Visual Metronome

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

audio

Camera Exposure Value (EV) & Equivalent Settings Calculator

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

photography

Focal Length & Crop Factor Multiplier Converter

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

photography

Audio Bitrate, Duration & File Size Calculator

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

audio

Decibel Sound Pressure Level (dB SPL) & Distance Calculator

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

acoustics

Video Aspect Ratio Padding & FFmpeg Letterbox Calculator

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

video

Aspect Ratio Resizer & Calculator

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

multimedia

Subtitle Time Shifter (SRT / VTT)

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

multimedia

Online Audio Cutter & Ringtone Trimmer

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

audio-editing

Audio Volume Normalizer & Peak Gain Maximizer

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

audio-editing

Audio Speed & Playback Rate Controller

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

audio-playback

Microphone Voice Recorder & WAV Audio Capture

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

audio-recording

Audio Header & Metadata Technical Inspector

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

audio-inspection

Pure Tone & Audio Frequency Sound Generator

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

audio-synthesis

Audio Joiner & Sequence Merger – Combine Audio Online

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

audio

Audio Silence Detector & Trimmer – Strip Dead Air

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

audio