T2Tool2Do

25 tools

Audio Tools

Estimate, time, tune, and practice audio and music tasks in your browser.

Tool2Do audio tools combine lightweight music calculators with browser-side conversion, trimming, compression, and editing workflows. Files stay on your device where local processing is supported, while planning calculators remain fast and instant.

Popular tools

Common starting points in this category.

Audio · Calculator

Tap BPM

Tap a button or keyboard key to estimate tempo from recent taps.

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Audio · Audio

Metronome

Run a simple browser metronome with BPM, tap tempo, and accent options.

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Browse by task

Convert

Convert supported audio files locally with FFmpeg WASM.

2 tools

MP3 Converter

Convert supported audio files to MP3 in your browser with FFmpeg.

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Audio Converter

Convert supported audio files between MP3, WAV, OGG, and M4A.

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Edit

Trim, reverse, speed, volume, and channel tools for small browser-side audio edits.

5 tools

Audio Trimmer

Trim a selected section from supported audio files using FFmpeg in the browser.

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Reverse Audio

Reverse supported audio files locally in your browser.

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Audio Speed Changer

Speed up or slow down audio between 0.5x and 2x.

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Audio Volume Changer

Adjust audio volume percentage using FFmpeg in the browser.

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Stereo to Mono

Convert supported stereo audio files to mono.

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Optimize

Reduce audio size or plan output settings.

3 tools

Audio Compressor

Reduce audio file size by re-encoding to MP3 at a lower bitrate.

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Audio File Size Calculator

Estimate audio file size from duration and bitrate.

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Audio Bitrate Calculator

Estimate bitrate from file size and duration, or file size from bitrate.

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File Estimates

Estimate audio file sizes, duration, PCM WAV size, and average bitrates without loading media engines.

4 tools

Audio File Size Calculator

Estimate audio file size from duration and bitrate.

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Audio Bitrate Calculator

Estimate bitrate from file size and duration, or file size from bitrate.

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Audio Duration Calculator

Estimate audio duration from file size and bitrate.

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WAV File Size Calculator

Estimate uncompressed PCM WAV size from sample rate, bit depth, channels, and duration.

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Music & Timing

Calculate BPM, delay times, bars-to-time, and tempo-based reverb references.

6 tools

BPM Calculator

Calculate tempo from a number of beats over time.

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Tap BPM

Tap a button or keyboard key to estimate tempo from recent taps.

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BPM to Milliseconds

Convert BPM to milliseconds or milliseconds back to BPM for music timing.

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Delay Time Calculator

Calculate musical delay times from BPM.

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Beats to Time Calculator

Convert bars and beats into seconds at a chosen BPM.

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Reverb Pre-Delay Calculator

Find tempo-related pre-delay reference values.

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Notes & Pitch

Convert notes, frequencies, MIDI note numbers, intervals, and key relationships.

6 tools

Note Frequency Calculator

Calculate a musical note frequency using equal temperament.

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Frequency to Note

Find the nearest musical note for a frequency in Hz.

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MIDI Note to Frequency

Convert MIDI note numbers into note names and frequencies.

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Music Interval Calculator

Find the interval and semitone distance between two notes.

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Music Transposition Calculator

Calculate the semitone difference between two keys.

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Capo Calculator

Find capo positions and chord shapes for a desired sounding key.

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All audio tools

25 tools in this category.

Audio · Audio

Audio Trimmer

Trim a selected section from supported audio files using FFmpeg in the browser.

Use tool

Audio · Calculator

Tap BPM

Tap a button or keyboard key to estimate tempo from recent taps.

Use tool

Audio · Audio

Metronome

Run a simple browser metronome with BPM, tap tempo, and accent options.

Use tool

Related categories

Creator ToolsTools for creators, makers, and independent projects.Developer ToolsFormat, compare, decode, and inspect technical data locally where possible.Convert ToolsUnit, format, and measurement converters.