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 Minesweeper 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 Binary Lambda Calculus Calendar Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi 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 Minesweeper 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 Binary Lambda Calculus Calendar Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 226th lifthrasiir 🇰🇷 657 182 445ms 2 Dec 2024 227th nullie 656 198 9ms 14 Jun 2022 227th emgordon154 656 198 10ms 16 Oct 2025 229th stefangimmillaro 653 181 336ms 6 Oct 2025 230th MeWhenI 🇻🇦 652 191 2ms 28 Feb 2024 231st Salutations45 651 187 9ms 15 Oct 2025 232nd stefangimmillaro 648 147 41ms 12 May 2024 233rd emgordon154 648 241 6ms 29 Jun 2025 234th duckyluuk 🇳🇱 646 185 1,333ms 23 Jun 2024 235th MostParsingVex 646 459 28ms 16 Jan 2025 236th error256 645 329 8ms 29 Jul 2024 237th stefangimmillaro 644 227 106ms 3 Oct 2023 238th emgordon154 642 186 880ms 12 Apr 2025 239th lynn 642 249 1,387ms 25 Oct 2021 240th stefangimmillaro 642 255 176ms 24 Jul 2023 241st SirBogman 🇺🇸 640 149 38ms 31 Jan 2024 241st tatzyr 🇯🇵 640 149 34ms 10 Mar 2025 243rd stefangimmillaro 639 273 158ms 17 Nov 2023 244th orthoplex 🇨🇽 637 204 16ms 13 Oct 2021 245th dcgjb 634 181 849ms 30 Jan 2024 246th jakobkordez 🇸🇮 634 205 16ms 30 Oct 2022 247th MeWhenI 🇻🇦 631 176 139ms 4 Sep 2024 248th AdrienHache 🇫🇷 629 188 362ms 25 Jul 2025 249th annaproxy 628 207 10ms 6 May 2022 250th stefangimmillaro 627 159 1,169ms 20 Oct 2023 251st StefanHabel 🇨🇦 625 208 10ms 8 Apr 2024 252nd DialFrost 🇸🇬 616 180 661ms 18 Jan 2024 253rd OllieBoyne 🇬🇧 616 211 9ms 19 Aug 2022 254th annaproxy 616 309 146ms 4 Sep 2022 255th stefangimmillaro 614 195 3,461ms 12 Nov 2024 256th postie77 613 193 362ms 24 Mar 2023 257th Artemis21 🇬🇧 613 212 15ms 3 Jan 2025 258th bac0id 607 208 370ms 25 Jun 2024 259th InigoK 🇺🇸 607 214 16ms 22 Sep 2025 260th rucin93 🇵🇱 604 196 154ms 5 Jan 2025 261st mathisfun271 604 215 10ms 12 Feb 2024 261st anter69 🇭🇺 604 215 15ms 7 Jul 2025 263rd TFeld00 🇩🇰 601 216 15ms 19 May 2022 263rd andrewjc2000 601 216 28ms 15 May 2025 265th weliveinhell 🇭🇹 600 203 10ms 19 Jul 2024 265th helbling 🇨🇭 600 203 10ms 6 Sep 2024 267th neel11235813 595 201 1,219ms 1 Apr 2024 268th ndren 593 219 25ms 22 Nov 2023 268th neel11235813 593 219 18ms 1 Apr 2024 270th DialFrost 🇸🇬 591 201 4ms 18 Jan 2024 271st voytxt 🇨🇿 591 206 9ms 15 Aug 2025 272nd DialFrost 🇸🇬 588 221 17ms 18 Jan 2024 272nd BREMAUCY 🇫🇷 588 221 17ms 22 Aug 2025 274th MeWhenI 🇻🇦 588 272 1,275ms 14 Jun 2023 275th scpchicken 🇵🇼 587 324 149ms 17 Mar 2023 276th KatieLG 🇬🇧 585 222 9ms 7 Jul 2024 277th bac0id 584 185 2ms 25 Jun 2024 278th dmrichwa 🇺🇸 577 211 9ms 17 Jun 2023 279th jared-hughes 576 135 40ms 25 May 2022 280th lynn 576 303 152ms 31 Mar 2022 281st guilhem-roy 🇫🇷 572 227 10ms 3 Mar 2022 282nd antimon2 🇯🇵 569 195 1,274ms 8 Mar 2024 283rd bac0id 569 208 361ms 25 Jun 2024 284th scpchicken 🇵🇼 567 229 16ms 13 Oct 2023 285th janbehrens 🇩🇪 559 218 8ms 4 Dec 2024 286th stu303 558 233 9ms 20 Jul 2022 287th CaedenHarper 🇨🇦 553 218 914ms 2 Oct 2025 288th davecame 550 236 16ms 19 Mar 2024 289th DialFrost 🇸🇬 548 221 1ms 29 Jan 2024 290th m42km 546 238 18ms 12 Nov 2023 291st CaedenHarper 🇨🇦 541 240 10ms 10 Aug 2025 292nd KatieLG 🇬🇧 538 222 796ms 27 Oct 2024 293rd MichalMarsalek 🇨🇿 538 266 351ms 12 Oct 2023 294th commandblockguy 🇺🇸 537 242 10ms 27 Sep 2023 295th dokutan 535 243 17ms 9 Sep 2025 296th olleicua 🇺🇸 532 179 41ms 20 Feb 2025 297th bac0id 532 275 115ms 25 Jun 2024 298th alemelis 530 245 16ms 27 Aug 2024 298th CornerMercury 🇬🇧 530 245 16ms 2 Mar 2025 300th m42km 529 226 1,094ms 4 Feb 2024 First Prev 226–300 of 448 Next Last