Free Online Productivity Tools
Tools that save time, reduce friction, and help you focus. Use the Pomodoro timer for deep work, the age calculator for date math, and the percentage calculator for quick calculations. Looking to split a bill? See our calculator tools.
Tools That Actually Save Time
The best productivity tools are the ones you can use in under 5 seconds. No sign-in, no setup, no waiting. Click, use, done. Our productivity tools are designed with this principle — open a tool, get your answer, move on. Whether you are timing a focus session, splitting a dinner bill, or doing quick date math, these tools are always available and always instant.
The Pomodoro Technique Explained
The Pomodoro Technique, developed by Francesco Cirillo, uses timed intervals (typically 25 minutes) of focused work followed by short breaks (typically 5 minutes). After four sessions, you take a longer break of 15–30 minutes. Research on the technique shows that it reduces mental fatigue, improves focus, and makes large tasks feel more manageable by breaking them into time-limited chunks. Our Pomodoro timer implements the full technique with customizable session lengths and browser notifications.
Percentage Calculator Modes
X% of Y
Most common. Calculate 20% of 85, or 15% tip on a $47 bill. Quick for everyday percentage calculations.
X is what % of Y?
Calculate what percentage one number is of another. Example: 23 is what % of 150? Answer: 15.3%
Percentage change
Calculate the percentage increase or decrease from one value to another. Useful for tracking price changes, traffic growth, and performance metrics.
Increase / Decrease by %
Increase a price by 12% for markup, or decrease by 30% for a sale discount. Get the exact resulting value instantly.
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Frequently Asked Questions
Do these productivity tools require an account?
No. Every productivity tool works instantly with no sign-up, no setup, and no limits. Open a tool, get your result, and move on.
Does the Pomodoro timer keep running if I switch tabs?
The timer keeps counting in the background, though browsers throttle background tabs, so the countdown may update less smoothly. A browser notification alerts you when a session ends. For best results, keep the tab open and enable notifications.
Is my data saved or private?
Everything runs in your browser. Your timer settings, calculations, and bill amounts are never sent to a server or stored remotely — the tools are completely private.
Can I customize the Pomodoro intervals?
Yes. You can adjust the focus session length, short break length, long break length, and how many sessions occur before a long break, so the technique fits how you actually work.