Toolbox Corner

A small collection of utilities I keep reaching for: network engineering, automation, and music practice. Everything here runs in your browser.

Music tools Network tools NAF Discovery Tool Professional profile

Music Practice

MUSIC

Web Audio starts only after you press a button (browser policy). The tuner needs microphone permission.

Metronome

TEMPO

Tap tempo, subdivisions, swing, and a downbeat accent.

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Tempo Ramp

SPEED

Ramp from a start BPM to an end BPM in steps every N bars.

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Rhythm Trainer

TIME

Tap along and measure early/late timing in milliseconds.

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Drone

INTONATION

A sustained pitch for intonation work (note + octave, waveform, and A4 tuning).

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Practice Timer

FOCUS

Build a practice session out of timed blocks. Beeps on transitions.

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Practice Log

LOCAL

Local-only practice logging with export/import. No accounts.

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Setlist Mode

FLOW

Build a practice setlist that links out to tool presets.

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Interval Ear Trainer

EAR

Melodic or harmonic intervals, with selectable interval sets and stats.

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Chord Looper

HARMONY

Loop common progressions in any key with a simple synth + optional click.

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Scale Randomizer

PROMPT

Random practice prompts for scales, arpeggios, and patterns.

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Tuner

MIC

Microphone-based pitch detection with cents deviation. Headphones recommended.

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Network Engineering

NETWORK

CIDR planning, BGP communities, and quick config diffs. Everything runs locally in your browser.

IPv4 Subnet Planner

CIDR

Paste a CIDR, get the mask/network/broadcast/host range. Split a supernet into child prefixes safely.

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BGP Community Decoder

BGP

Decode standard and large communities. Recognizes well-known values like no-export and no-advertise.

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Config Diff Viewer

DIFF

Paste before/after configs and get a readable line diff. Optional whitespace and blank-line normalization.

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