QR Decoder in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 300th janbehrens 🇩🇪 526 247 11ms 4 Dec 2024 302nd CaedenHarper 🇨🇦 524 228 744ms 19 Jan 2025 302nd commandblockguy 🇺🇸 524 228 974ms 1 Sep 2025 304th albanian-laundromat 524 230 934ms 12 Sep 2025 305th Natanaelel 🇸🇪 524 363 172ms 16 Jun 2025 306th Natanaelel 🇸🇪 521 183 32ms 18 Feb 2024 307th rucin93 🇵🇱 520 250 21ms 21 Jan 2024 308th bac0id 519 257 399ms 25 Jun 2024 309th coreynash 516 236 10ms 13 Feb 2024 309th CaedenHarper 🇨🇦 516 236 11ms 29 Aug 2025 311th dokutan 515 232 1,083ms 9 Sep 2025 312th DialFrost 🇸🇬 511 367 4ms 27 Sep 2024 313th rucin93 🇵🇱 510 234 979ms 21 Jan 2024 314th cros107 🇦🇺 509 255 11ms 28 Jan 2024 314th RaBa21 🇭🇺 509 255 23ms 31 Jul 2025 316th jerrandolph 506 306 246ms 25 Sep 2025 317th CedricGebistorf 505 257 18ms 3 Mar 2022 318th andersk 🇺🇸 504 346 257ms 1 Nov 2022 319th uttumuttu 🇫🇮 503 242 9ms 9 Apr 2022 320th scpchicken 🇵🇼 501 224 157ms 25 Feb 2023 321st Waffle3z 500 249 2ms 18 Sep 2021 322nd snoozingnewt 🇺🇸 500 284 97ms 14 Oct 2023 323rd janbehrens 🇩🇪 499 238 7ms 4 Dec 2024 324th MarcMush 🇫🇷 498 261 17ms 14 Jan 2024 324th blaztoma 🇱🇹 498 261 22ms 20 Sep 2025 326th emgordon154 497 245 9ms 4 Aug 2024 327th RYNO8 496 262 19ms 4 Sep 2023 328th CatsAreFluffy 494 263 22ms 17 Feb 2024 329th albanian-laundromat 494 319 3ms 16 Jul 2025 330th wh3n3v3r 🇨🇿 492 264 17ms 14 Nov 2024 331st SB-945 490 265 14ms 14 Mar 2024 332nd Waffle3z 489 249 10ms 18 Sep 2021 333rd mossiegoat 488 266 17ms 27 Aug 2025 334th olleicua 🇺🇸 487 250 9ms 21 Feb 2024 335th ridingqwerty 🇺🇸 486 267 17ms 14 Feb 2024 335th te-chnical 486 267 29ms 3 May 2025 337th albanian-laundromat 485 268 18ms 28 Jun 2025 337th FortuiteMan 🇫🇷 485 268 21ms 7 Jul 2025 339th p-vf 🇨🇭 481 246 354ms 21 Nov 2021 340th alemelis 480 249 941ms 23 Aug 2024 341st KatieLG 🇬🇧 479 254 9ms 26 Oct 2022 342nd snoozingnewt 🇺🇸 478 272 18ms 24 days ago 343rd janbehrens 🇩🇪 477 286 20ms 13 Sep 2022 344th scpchicken 🇵🇼 474 206 3ms 24 Feb 2023 345th MeWhenI 🇻🇦 473 268 489ms 4 Mar 2022 346th Waffle3z 472 202 39ms 23 Sep 2021 347th janbehrens 🇩🇪 466 254 373ms 4 Dec 2024 348th janbehrens 🇩🇪 462 240 638ms 4 Dec 2024 349th adamnielson42 🇺🇸 454 286 20ms 29 Nov 2023 350th elgan65536 451 387 177ms 10 Apr 2024 351st emgordon154 447 265 178ms 5 Jan 2025 352nd CaedenHarper 🇨🇦 446 299 475ms 17 days ago 353rd janbehrens 🇩🇪 443 301 437ms 4 Dec 2024 354th snoozingnewt 🇺🇸 441 271 800ms 11 Feb 2024 355th MeWhenI 🇻🇦 441 480 316ms 18 Mar 2024 356th CaedenHarper 🇨🇦 440 269 407ms 7 days ago 357th knutae 🇳🇴 439 296 10ms 29 Oct 2021 358th Natanaelel 🇸🇪 438 737 24ms 19 Feb 2024 359th qpwoeirut 434 299 20ms 2 days ago 360th BambooleanLogic 🇸🇪 433 281 9ms 13 Jul 2023 361st IISResetMe 422 272 244ms 14 Jun 2024 362nd msbranicky 419 310 18ms 12 Aug 2023 363rd pschmid0 🇺🇸 414 287 6ms 23 Oct 2022 364th janbehrens 🇩🇪 411 307 2,375ms 20 Nov 2022 365th raspofabs 407 319 21ms 12 Nov 2023 366th MeWhenI 🇻🇦 406 506 6ms 19 Mar 2024 367th janbehrens 🇩🇪 404 314 457ms 13 Sep 2022 368th yzhs 🇩🇪 392 331 10ms 4 Jun 2022 369th LeeCamp 387 336 18ms 9 Dec 2021 370th msbranicky 384 311 994ms 16 Jan 2024 371st yuchuehw 384 338 17ms 5 Jan 2024 372nd annaproxy 383 309 335ms 20 Mar 2022 373rd mbittner20 383 339 10ms 3 Jul 2023 374th CatsAreFluffy 380 201 62ms 27 Jan 2023 375th Indivicivet 380 342 12ms 19 Oct 2021 First Prev 301–375 of 442 Next Last