Date & Time Tools
Chess Clock
Free browser chess clock with Fischer increment, Bronstein and simple delay, presets from 1+0 to 60+30, sound, and full-screen play. No signup, no install.
Status
White to start
Fischer increment (time added when a move ends) (3s increment)
Tip: tap your own clock to end your turn. Keyboard: Space to swap, P to pause or resume, R to reset.
Time control
Pick a preset or build a custom control. Changes here reset both clocks.
Preset: 5 | 3
Mode
Fischer increment (time added when a move ends)
Custom
Side labels
First to move
Available before the game starts. Use Reset to change after.
Time control modes
Sudden death
Each player gets a single allotment. No bonus on moves. Run out and you lose on time. Useful for quick blitz at standard ratios like 1 plus 0, 3 plus 0, and 5 plus 0.
Fischer increment
A fixed bonus (for example 2, 3, or 10 seconds) is added when a player finishes a move. Time you don't use accumulates, so clean play earns time. The standard for modern online play and FIDE rapid and classical events.
Bronstein delay
When a player ends a move, the clock refunds the smaller of the delay (for example 3 seconds) and the time actually used. Unused delay does not accumulate, so your main time can never exceed the starting amount. Common at FIDE classical events.
Simple delay (US Delay)
The active player's main clock pauses for the first N seconds of their turn. After the delay window expires, the clock starts counting down. Standard at most US Chess events.
How to use
- Pick a preset chip (1+0 through 60+30, plus Bronstein and simple delay variants) or build a custom control with the Mode buttons and the base/increment inputs.
- Optionally rename the sides (default White / Black) and choose which side moves first.
- Tap either clock or press Space to start the game. The active clock highlights blue.
- After making a move, tap your own clock (or press Space) to stop your time and start the opponent's.
- Press P to pause and resume. Press R to reset to the current time control.
- Watch the bottom move counters and the red 10-second warning. If a player's clock hits zero, that side is flagged and the opponent wins on time.
- Use the sound toggle to mute tick, warning, and flag tones. Sound is synthesised on the fly with Web Audio; no assets are downloaded.
About this tool
Chess Clock is a free two-player game clock for chess and any other turn-based game. Four standard time controls are built in: sudden death (a single allotment per side), Fischer increment (a fixed bonus is added when a move ends, the modern online and FIDE standard), Bronstein delay (each move refunds the smaller of the delay and the time used, so the main clock can never exceed its starting value), and simple delay (also called US Delay, where the active player's clock pauses for the first N seconds of each turn). Twelve presets cover the formats people actually play: 1+0, 2+1, 3+0, 3+2, 5+0, 5+3, 10+0, 15+10, 25+10, 30+0, 60+30, plus 5+3 Bronstein and 5+3 simple delay. The custom panel takes any base from 1 minute to 12 hours and any increment or delay from 0 to 60 seconds. Tap your own clock to end your turn (Space on the keyboard, or the dedicated buttons under each clock). The active clock highlights blue, switches to red under 10 seconds with a warning beep, and locks to red with a flag sound when a player runs out (the opponent wins on time). Sound is synthesised with Web Audio so the page ships with no audio assets and works offline. The Screen Wake Lock API keeps your phone or laptop screen on while a game is in progress; older browsers without wake lock work normally. Custom side labels make this useful for Scrabble, Go, Backgammon, board game design playtesting, debate practice, two-player typing races, and any other turn-based scenario where you need a precise, reliable, no-install game clock. Everything runs locally in your browser. Nothing you do here leaves your device.
Free to use. Works in your browser. No signup, no login.
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