Habit Tracker
Build lasting habits with daily tracking, streak counting, and visual progress heatmaps. All data stored locally in your browser.
How It Works
- Add habits you want to build or maintain
- Check them off each day as you complete them
- Watch your streaks grow on the heatmap
- Use weekly view to spot patterns in your routine
Features
- Unlimited habits with custom colors
- Automatic streak counting
- Visual heatmap (past 16 weeks)
- Weekly completion overview
- Per-habit frequency settings
- Export data as JSON backup
- All data stored in your browser
- Navigate to past/future dates
- Edit or delete habits anytime
What is Habit Tracker?
Habit Tracker is a free online habit tracking tool that helps you build daily routines by logging completions, counting streaks, and visualizing your consistency over time. It runs entirely in your browser with no account required, no data uploaded, and no limits on how many habits you can track.
Whether you are trying to exercise daily, read more, meditate, or build any repeating behavior, this tool gives you the visual feedback loop that keeps you motivated. It solves the problem of losing track of progress by showing exactly how consistent you have been over weeks and months.
How to Use This Tool
Follow these steps to track your habits with this free online habit tracker:
- Add a habit - Click the "New Habit" button, type a name (like "Morning run" or "Read 30 minutes"), pick a color, and choose which days of the week it applies to. Leave all days selected for daily habits.
- Check off daily - Each day, tap the checkbox next to each habit you completed. The streak counter updates instantly and the checkmark animates to confirm.
- Review your week - Switch to Week view to see a 7-day grid showing how many habits you completed each day as a fraction and percentage fill.
- Track long-term progress - Switch to Heatmap view to see a 16-week color-coded grid (like GitHub contributions) that reveals your consistency patterns at a glance.
- Export your data - Click "Export JSON" to download a backup of all your habits and completion history. Useful for safekeeping or transferring to another device.
Key Features
- Automatic streak counting - Tracks your current streak and longest-ever streak for each habit, updating in real time as you check off completions.
- 16-week heatmap - A color-intensity grid showing daily completion rates over the past 112 days, making it easy to spot gaps or improvements in your routine.
- Custom frequency per habit - Set each habit to specific days of the week (e.g., gym on Mon/Wed/Fri only) so your daily list only shows what is relevant.
- Statistics dashboard - Four live metrics at the top: best active streak, longest streak ever, 30-day completion rate, and total lifetime check-ins.
- JSON data export - Download your complete habit data and history as a structured JSON file for backup, analysis, or migrating to another browser.
- 100% private, local storage - All data stays in your browser localStorage. Nothing is sent to any server. Works offline after the first page load.
Common Use Cases
Students use this habit tracker to build study routines and track daily revision sessions across subjects. Fitness enthusiasts track workout days, stretching, and hydration goals with separate color-coded habits. Professionals use it to maintain productive morning routines like journaling, planning, and inbox-zero practices. People building mindfulness habits track meditation streaks and see their consistency improve week over week on the heatmap. The frequency feature is particularly useful for habits that are not daily: tracking three gym sessions per week, weekend meal prep, or biweekly deep cleaning.
Frequently Asked Questions
Is my habit data private? Where is it stored?
Yes, completely private. All your habit data and completion history are stored in your browser's localStorage. Nothing is ever sent to a server. This means your data stays on your device and is never visible to anyone else, but it also means clearing your browser data will erase your history.
Can I track habits that are not daily (like 3 times a week)?
Yes. When creating or editing a habit, you can select specific days of the week. For example, if you only go to the gym Monday, Wednesday, and Friday, select those three days. The habit will only appear in your daily checklist on those days, and your streak and completion rate will be calculated accordingly.
How does the streak counter work?
The streak counts consecutive days (going backwards from today) where you checked off a habit. If you miss a day, the streak resets to zero. The tool also tracks your longest-ever streak so you always have a personal record to beat. If today is not yet checked off, it looks back from yesterday to avoid breaking your streak mid-day.
Can I mark a past day as completed if I forgot to check in?
Yes. Use the left arrow button next to the date to navigate to any past day, then check off habits you completed on that date. Your streaks and heatmap will update retroactively. You can also navigate forward if you want to pre-plan, though only past completions affect your streak count.
Does this habit tracker work offline?
Yes. After the page loads once, all functionality works without an internet connection because the entire app runs client-side in JavaScript. Your data is read from and written to localStorage, which does not require network access. You can bookmark the page and use it on a plane, in a subway, or anywhere without connectivity.
How can I back up my habit data or move it to another device?
Click the "Export JSON" button in the toolbar to download a complete backup of your habits and completion history as a JSON file. This file contains all your habit definitions, colors, frequencies, and every daily check-in record. You can save this file to cloud storage or email it to yourself for safekeeping.
What happens if I miss a day? Does it ruin my progress?
Missing a day resets your current streak to zero, but it does not erase your history. Your longest-ever streak, total check-ins, and 30-day completion rate remain intact. The heatmap still shows all your past completions, so you can see that one missed day in the context of weeks of consistency. Many habit researchers recommend focusing on the overall rate rather than a single perfect streak.