Media

Bitrate Calculator Convert between duration, file size and bitrate for audio and video — in your browser. Aspect Ratio Calculator Simplify any width × height into its aspect ratio, or find the missing dimension — in your browser. Microphone Test Check your microphone with a live level meter in your browser — nothing is recorded. Headphone & Stereo Test Test left and right channels, balance and frequency response with tones generated in your browser. Webcam Test Preview your camera, see its real resolution and frame rate and take a photo — all in your browser. Social Media Video Specs Quick reference for video duration, aspect ratio, resolution and file size limits on Instagram, TikTok, YouTube, Facebook, LinkedIn, X and Pinterest. Musical Scale Generator Pick a root note and a scale type to see all the notes and the diatonic chords — major, minor, modes, pentatonic, blues and more. Voice Recorder Record audio from your microphone in the browser — playback and download, nothing uploaded. Tone Generator Generate a pure tone at any frequency from 20 Hz to 20 kHz — sine, square, triangle or sawtooth. Online Metronome Keep time with an adjustable metronome — 40 to 240 BPM, multiple time signatures, accent on beat one. Audio Trimmer Trim an audio file to a specific time range with waveform visualization — export as WAV, no upload. Instrument Tuner Tune any instrument with your microphone — real-time pitch detection shows the note and how many cents sharp or flat. Decibel Meter Measure the ambient sound level in decibels using your device microphone — no app needed. Speech to Text Dictate and see your words appear as text — using your browser's built-in speech recognition, no installation needed. BPM Tap Tempo Tap the button or press any key to the beat and see the BPM — stabilises after 4-5 taps. Delay & Reverb Time Calculator Type a BPM and see the delay times in milliseconds for every note value — quarter, eighth, dotted, triplet. Musical Note ↔ Frequency Converter Convert between musical notes and their frequency in Hz — with adjustable A4 tuning. Chord Transposer Paste chords or a chord chart and transpose up or down by any number of semitones. Audio Sample Rate & File Size Calculator See how sample rate, bit depth and channels affect file size and the Nyquist frequency limit. Depth of Field Calculator Calculate how much of the scene is in focus — near limit, far limit and hyperfocal distance — from focal length, aperture and distance. Rule of 500 / NPF for Astrophotography Find the maximum shutter speed for sharp stars — with the rule of 500, the stricter rule of 300 and the NPF formula. 35mm Equivalent Focal Length Convert any focal length to its 35mm equivalent using the crop factor of your sensor. Golden Hour Calculator Find the golden hour and blue hour times for any latitude and date — for photography planning. Streaming Royalties Calculator See how much plays pay on Spotify, Apple Music, YouTube Music and other platforms. Playlist Duration Calculator Paste track durations to get the total length and the end time if you press play now. Video to GIF Convert any video clip to an animated GIF — set start, end, FPS and width. Runs entirely in your browser via WebAssembly. Trim Video Cut a video to keep only the part you want — set start and end times. No upload, no server. Compress Video Reduce video file size by re-encoding at a lower quality — choose high, medium or low. 100% in your browser. Extract Audio from Video Pull the audio track out of any video file — save as MP3 or WAV. No upload, no server.