Online Chess Clock

Two players, one device

5+0 Fischer

Time control

5+0 · Fischer

Black taps to start White’s clock.

Skin

Presets

Moves

# White Black

Free Online Chess Clock

This chess clock is for two people sharing one phone, tablet, or laptop — over the board, not against an engine. Open the page and you already have a 5+0 blitz control. Black taps Start White, then each player taps their own face after a move. When the game starts, the website tucks away so the two faces and the recessed plunger fill the screen.

Play like a physical clock

Table mode hides the header, dock, and article. On a phone in portrait, the top clock rotates 180° so the player across the table can read it — even if Flip was turned off on a desktop earlier. Landscape puts the faces left and right. Space or A / L ends the active player’s turn. Undo takes back one accidental press. Pause if someone knocks a piece; Reset starts the same time control again. Gear opens a centered settings sheet over a dim scrim; Escape or the scrim closes it without ending the game.

  • Primary presets 3+2, 5+0, and 15+10, plus bullet through 30+0
  • Fischer, Bronstein, delay, multi-stage (40/90+30), byo-yomi, and Canadian overtime
  • Handicap, names, undo, lock, four chassis skins (Teal, Walnut, Night, Arena)
  • Result card with remaining times, PGN of clock times, and a watch link for a second tab on this computer
  • Shareable #5+0 / #3+2b / #40/90+30s / #10+30y5 links

Which control to pick

3+2 is the usual online blitz: three minutes plus two seconds a move, so a long think does not empty the clock. 5+0 is sudden-death blitz — no increment, flags come fast. 15+10 is rapid, closer to a club evening. Classical games can use multi-stage #40/90+30s (40 moves in 90 minutes, then 30 more). Japanese byo-yomi and Canadian overtime sit behind Club controls on the same page. Under ten seconds the thinking face draws a thin bezel and switches to tenths.

Not a tournament DGT

Browsers can pause JavaScript when a tab is hidden. Keep the screen on for games that matter. A refresh restores an in-progress or flagged game from this tab’s session for six hours and returns you to the table. Need to count up instead? Use the stopwatch. A single duration with an alert is the timer. Coordinating time zones stays on the world clock. Shift length in clock hours is the hours calculator.

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Online chess clock help & questions

Black taps first — the Start White cue on that face. That starts White’s clock, the same ritual as a physical chess clock. After that, tap your own face (or press Space) when you finish a move. On a keyboard, A ends Black’s turn and L ends White’s.
The first number is minutes each player gets at the start. The second is extra seconds per move. Fischer adds the full increment after every move. Bronstein refunds up to the delay you actually used. Simple delay waits before the main clock starts, and unused delay is discarded. 5+0 is five minutes with no extra; 3+2 is three minutes plus two seconds per move; 15+10 is a common rapid control.
Open Club controls for these. Multi-stage (for example #40/90+30s) gives 90 minutes for 40 moves, then adds 30 minutes. Byo-yomi (#10+30y5) is 10 minutes then five 30-second periods; a move inside a period resets that period. Canadian overtime (#60+15c20) is 60 minutes, then repeating 15-minute periods in which you must make 20 moves.
Yes. Place the phone between you. In portrait the top clock flips 180° automatically so the player opposite you can read it, even if Flip was off on a wider screen. Landscape puts Black and White side by side. When the game starts, the website chrome hides so only the two faces and the plunger remain.
Space ends the move of whichever side is currently on the clock. A ends Black, L ends White. Keys do nothing while you are typing in a field or the command palette (Ctrl+K) is open.
Undo (or the U key) restores the previous turn once. Lock blocks the gear and reset so nobody ends the game by accident; the faces still work. During table play, the gear opens a centered settings sheet over a dim overlay — Escape or a tap on the dim area closes it without resetting.
An in-progress or flagged game in this browser tab is restored after refresh for six hours, and the table view comes back. Phones can still sleep; keep the page visible for serious games. This is a browser clock, not FIDE-certified tournament equipment.
Copy link uses a hash such as #5+0, #3+2b, #40/90+30s, or #10+30y5. After a flag, the result card shows remaining times on both faces. Copy watch link opens a second tab on this computer that follows the live clocks (no server, same browser). You can also download a PGN of the clock times.
Teal, Walnut, Night, and Arena recolor the chassis itself — the well, both modules, and the shuttle — not only the settings drawer. Pick one before you start or from the overlay during a pause.