Free, open-source tools for bridge players and teachers. Every one runs in your browser with nothing to install — and every one is also a command-line program, if you would rather have it on your own machine.

♣♦♥♠NT
N791168
S791168
E64274
W64274
bridge-solver
Fast double-dummy solver with par scoring, cardplay analysis and a claim checker. Also for Python (pip install bridge-solver) and C.
v2.1.0Runs offline
# strong NT opener
condition
  hcp(north) >= 15 and
  shape(north, any 4333)
produce 24
generated 24 in 0.4s
dealer3
Rust rebuild of the classic dealer.exe hand generator — runs its scripts, accepts its command line.
v1.0.0Runs offline
Board 1Dealer N · None vul
NORTH
♠ AK7
♥ Q104
♦ KJ3
♣ 8642
SOUTH
♠ QJ52
♥ AK9
♦ A874
♣ K9
PBN to PDF
Turn a PBN file into printable hand diagrams, declarer’s-plan worksheets and bidding sheets.
v0.18.0Runs offline
♠ KQ75
♥ A92
♦ K84
♣ QJ3
→
NESW
1NTPass2♣Pass
2♠Pass4♠Pass
PassPass
rusty-bidding-bot
Rule-based bidding engine that bids all four hands and shows why it made each call.
v0.1.0-rc1Mostly offline
1♣1♦1♥1♠1N
2♣2♦2♥2♠2N
3♣3♦3♥3♠3N
PassDblRdblBID BOX
SWNE
1♣P1♠P
1NP3N
BidBase
Nelson Ford’s CardShark BidBase: 16,000 bidding rules, with his Bidding Practice program ported from Visual Basic.
v0.1.1Runs offline
NOTRUMP OPENING BIDS
1NT 15 to 17
✓2♣ Stayman ✓2♦/2♥ Transfer
✓Smolen Puppet
DEFENSE VS NOTRUMP
vs strong DONT vs weak X = pen
Convention card
Build and edit your partnership’s convention card. Import BBO, Bridgodex and BBA cards; print the ACBL card.
v0.4.0No account

Not a tool you can open — a component the tools build on.

♠ 7→SECOND_HAND_LOW
♥ K→COVER_AN_HONOUR
♣ 4→DUCK_TO_KEEP_ENTRY
bridge-rulebot
Deterministic rule-based cardplay bot with teachable reason codes — it says why it played the card.
No web UINo release yet