DerinBirNefes - Breathwork & Mindfulness by MentalCrafts

A calm breathing coach for your browser. Follow box breathing, 4-7-8, the physiological sigh or your own custom rhythm, guided by an animated pacer. Track streaks and mindful minutes on a private dashboard. No account, no tracking, all data local.

Open it as a toolbar popup, keep it in the sidebar while you work, or expand it to a full browser tab for the roomy dashboard view.

FIVE TECHNIQUES

• Physiological Sigh — a double inhale and long exhale, the quickest way to settle after a stressful moment
• Box Breathing — the equal 4-4-4-4 rhythm used for steady focus under pressure
• 4-7-8 — a slow, extended exhale pattern that supports winding down before sleep
• Coherent 5.5s — balanced timing aimed at heart rate variability
• Awakening 4-2-4 — a light, energizing pattern for a mid-day reset

Prefer your own rhythm? Build a custom routine with your own inhale, hold, exhale and rest durations and target cycle count, then save it as a one-tap preset.

A PACER THAT'S PLEASANT TO FOLLOW

A softly glowing orb expands and contracts in time with each phase, with an outer ring tracking your progress through the whole session. Optional gentle chimes mark phase changes, and a quiet ambient tone can play in the background.

SEE YOUR PRACTICE ADD UP

The dashboard gives you a consistency heatmap, a 14-day trend of mindful minutes, a breakdown of which techniques you use most, and a full session log — each entry optionally tagged with how you felt afterward, plus a short note.

GENUINELY PRIVATE

Every session, mood entry and setting is stored locally through the browser's own extension storage. Nothing is transmitted anywhere. The add-on requests a single permission — storage — and nothing else: no host access, no network requests, no analytics. Export your full history to a JSON file anytime and import it back whenever you like.

MAKE IT YOURS

Five visual themes — Deep Ocean, Sunset Glow, Midnight Slate, Soft Lotus and Forest Breath — plus Turkish and English, detected automatically from your browser language.

Whether you need sixty seconds to reset between meetings or a longer wind-down before bed, DerinBirNefes gives you a clear rhythm to follow and a private record of showing up for yourself.