Free for artists

Solar Heavy Tools

Free browser tools for singers, producers and independent artists. Nothing to install.

Sample flipper

Recycler

Drop in your own sample and roll new chopped, pitched and filtered versions. Download the WAV.

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Mix Check

Trimline: Master Prep

Check your mix and stems for clipping, true peak, loudness, phase and format, then export -3 or -6 dB headroom WAVs.

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Live pitch

Vocal Tuner

Sing a note and see how close you are, live in your browser. No upload, no sign-up.

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Streaming payouts

Royalty Calculator

Estimate what your streams pay across Spotify, Apple Music and more, split with collaborators.

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Loudness

LUFS Meter

Measure integrated LUFS, loudness range and true peak, and see what Spotify, Apple Music and YouTube will do to your master.

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Levels

dB Meter

Drop in a track for sample peak, true peak and RMS, or check the level in your room with your mic.

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Timing

Delay & Reverb Calculator

Turn any BPM into delay times in ms and Hz, dotted and triplet, plus reverb pre-delay and decay.

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Tempo

Metronome

Tap tempo, time signatures, accents and subdivisions, timed on the audio clock so it stays steady.

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Songwriting

Chord Progression Generator

Pick a key, mode and mood, hear the chords played back, and download a MIDI file for any DAW.

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Ears

Hearing Test

A 20 Hz to 20 kHz sweep shows the highest frequency you can hear, compared with data for your age.

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Analysis

BPM & Key Finder

Drop in an audio file to detect its tempo and musical key with a confidence rating. Nothing is uploaded.

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Ideas

Name Generator

Song titles, artist names and playlist names by genre and mood. Star your favorites and copy them in one click.

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Theory

Key & Scale Finder

Tap the notes of your melody or chords and see which key they are in, with close alternatives.

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Tuning

Tone Generator

An online tuning fork: A440, A432, middle C or any frequency, with a safe volume cap.

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Reference

Pitch to Hz & MIDI Converter

Convert note names, frequencies and MIDI numbers both ways, with cents and a full chart.

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Mixing

EQ Frequency Chart

Interactive EQ cheat sheet by instrument: where mud, boom, presence and air live, with a starting move for each band.

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Analysis

Stereo & Phase Checker

Check mono compatibility: correlation, mono-sum loss, side/mid and width over time. Your file never leaves your device.

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Reference

Audio File Size Calculator

WAV, AIFF, FLAC and MP3 sizes per minute or per song, for any sample rate, bit depth and channel count.

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Focus

Pomodoro Timer

Focus sessions with short and long breaks, a soft chime and a session counter. Accurate in background tabs.

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Calculator

Song Length & Release Cost Calculator

Add up track times, check single, EP or album, and plan your release budget with per-track cost and break-even streams.

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Songwriting

Rhyme Finder

Perfect and near rhymes with syllable counts, plus a syllable counter for your lyric lines. Built-in dictionary.

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Theory

Chord & Scale Reference

Notes, intervals, piano keys and guitar shapes for any chord or scale in any key, with MIDI download.

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Planning

Release Checklist Builder

A printable release to-do list from master to post-release. Tick items, add your own, saved in your browser.

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