100 Second Timer - Free Online Countdown Timer

01:40

100 Second Timer

Customize Your Timer Experience

Ring Settings:

Outer Ring Color:

Inner Ring Color:

Progress Ring Color:

Progress Shadow Color:

Time Display Settings:

Time Display Color:

Time Display Size (px):

Time Display Shadow Color:

Background Customization

Choose Your Background

Key Features

Visual Progress Tracking

Beautiful circular progress ring that displays your countdown visually with customizable colors and effects.

Fully Customizable

Adjust timer duration, colors, backgrounds, text size, and more to create your perfect timer experience.

Fullscreen Mode

Focus on your task with distraction-free fullscreen mode, perfect for presentations or focused work sessions.

Session Counter

Track your completed sessions automatically to monitor your productivity and achievements.

Audio Notifications

Receive pleasant sound alerts when your timer completes, so you never miss a session end.

Works Everywhere

No installation needed. Works in any modern browser on desktop, tablet, or mobile devices.

How to Use the 100 Second Timer

1. Set Your Duration

Enter your desired time in the "Timer Settings" section. Use format HH:MM:SS or MM:SS (default is 100 seconds / 01:40).

2. Customize Appearance (Optional)

Choose your preferred colors for rings, progress indicator, and text. Select a background color or image from the presets.

3. Start Your Timer

Click the "START" button to begin the countdown. The progress ring will visually show your remaining time.

4. Use Controls

Pause/resume with the main button, reset to start over, or enter fullscreen mode for distraction-free timing.