---
title: "About Mellow Harbor | Mellow Harbor"
description: "Mellow Harbor is a small set of free breathing and calm-down tools that run entirely in your browser, with no account, no recordings and no ads."
url: https://mellowharbor.cyou/about/
---

# About Mellow Harbor

A quiet corner of the web for a few minutes of slower breathing.

## What it is

Mellow Harbor has five free tools: a [box breathing timer](https://mellowharbor.cyou/), a [4-7-8 breathing timer](https://mellowharbor.cyou/4-7-8-breathing/), a [guided breathing pacer](https://mellowharbor.cyou/breathing-patterns/) with several rhythms, a step-by-step [5-4-3-2-1 grounding exercise](https://mellowharbor.cyou/5-4-3-2-1-grounding/) and a [calm-down timer](https://mellowharbor.cyou/calm-down-timer/). They are built for the moments when you need to slow down and do not want to sign up for anything first.

## How it works

Every tool runs in your browser. Timing comes from your device's clock, the tones are made on your device with the Web Audio API, and nothing you type or choose is sent to a server. Once a page has loaded it keeps working offline. Your settings and colour theme are remembered in your browser's local storage, and you can clear them at any time.

## What it is not

These are everyday relaxation exercises, not medical advice or a treatment. The pages that mention research link to the studies so you can read them yourself. If anxiety, panic or sleeplessness is affecting your life, please talk to a doctor or therapist, and if you are in crisis, call your local emergency number.

## Sources

The 4-7-8 instructions follow Dr Andrew Weil's description of the exercise. Notes on slow breathing and cyclic sighing cite the published papers on each page.