QR Decoder in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Calendar 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 Multitap Input 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 Tower of Hanoi 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 Connect Four Continued Fractions 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Erlang 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 ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar 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 Multitap Input 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 Tower of Hanoi 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 Connect Four Continued Fractions 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 81st error256 839 231 824ms 29 Jul 2024 82nd Steffan153 🇫🇮 837 129 1ms 11 Aug 2024 83rd edsrzf 🇳🇿 834 243 53ms 17 Dec 2025 84th MeWhenI 🇻🇦 833 156 9ms 30 Jul 2024 85th MeWhenI 🇻🇦 833 203 1,021ms 28 Feb 2024 86th Shanethegamer 🇺🇸 833 254 112ms 2 Apr 2025 87th canissimia 🇦🇶 833 316 18ms 2 May 2022 88th kg583 🇺🇸 832 236 6ms 16 Dec 2025 89th sean-niemann 🇺🇸 831 130 2ms 11 Aug 2024 90th Steffan153 🇫🇮 831 176 127ms 11 Aug 2024 91st IanUtley 831 335 21ms 20 Dec 2022 92nd sean-niemann 🇺🇸 830 152 390ms 17 Jul 2025 93rd lynn 829 96 39ms 3 Apr 2023 94th saito-ta 🇯🇵 829 118 2ms 13 Feb 2023 95th blaztoma 🇱🇹 828 157 16ms 28 Dec 2025 96th MeWhenI 🇻🇦 828 216 15ms 7 Jan 2025 97th MeWhenI 🇻🇦 828 277 6ms 17 Oct 2021 98th Steffan153 🇫🇮 825 153 64ms 11 Aug 2024 99th nwellnhof 🇩🇪 825 391 56ms 9 Jul 2022 100th Steffan153 🇫🇮 824 154 417ms 11 Aug 2024 101st kg583 🇺🇸 824 246 45ms 17 Dec 2025 102nd MeWhenI 🇻🇦 818 145 399ms 19 Jun 2025 103rd MeWhenI 🇻🇦 815 148 1,074ms 15 Sep 2025 104th MeWhenI 🇻🇦 815 364 25ms 30 Sep 2021 105th MeWhenI 🇻🇦 814 146 5ms 28 Feb 2024 106th emplv 🇱🇻 813 150 9ms 29 Apr 2022 107th Steffan153 🇫🇮 812 160 16ms 31 Jul 2024 108th UnderKoen 🇳🇱 812 608 4ms 11 Nov 2024 109th MeWhenI 🇻🇦 810 165 471ms 7 Nov 2025 110th Steffan153 🇫🇮 808 147 146ms 4 hours ago 111th Steffan153 🇫🇮 808 148 582ms 31 Jul 2024 112th MeWhenI 🇻🇦 808 204 132ms 28 Feb 2024 113th MeWhenI 🇻🇦 808 290 30ms 6 Jun 2023 114th jared-hughes 806 134 2ms 30 Jan 2023 115th nwellnhof 🇩🇪 805 193 304ms 24 Sep 2021 116th MeWhenI 🇻🇦 804 99 39ms 28 Feb 2024 117th sean-niemann 🇺🇸 803 148 142ms 29 Oct 2024 118th kg583 🇺🇸 803 264 6ms 24 Oct 2025 119th Irratix 🇳🇱 802 152 10ms 6 May 2022 119th MeWhenI 🇻🇦 802 152 9ms 28 Feb 2024 119th vlpx 🇫🇮 802 152 9ms 1 Aug 2024 122nd annaproxy 802 347 117ms 18 Sep 2023 123rd primo-ppcg 🇹🇭 802 531 10ms 20 Jun 2025 124th sean-niemann 🇺🇸 801 148 408ms 11 Aug 2024 124th Steffan153 🇫🇮 801 148 371ms 11 Aug 2024 126th jared-hughes 799 158 63ms 30 Jan 2023 127th lifthrasiir 🇰🇷 798 84 3ms 6 Dec 2024 128th ryyyn 🇺🇸 798 163 18ms 9 Dec 2025 129th namelessiw 796 168 475ms 15 Nov 2025 129th Steffan153 🇫🇮 796 168 377ms 20 hours ago 131st kg583 🇺🇸 796 204 4ms 16 Dec 2025 132nd stefangimmillaro 796 221 40ms 31 Jul 2023 133rd AlephSquirrel 795 247 5ms 27 Jan 2025 134th GolfingSuccess 🇬🇷 793 164 16ms 18 Sep 2021 134th 5cw 🇺🇸 793 164 10ms 8 May 2024 136th MeWhenI 🇻🇦 792 223 3ms 28 Feb 2024 137th emgordon154 792 398 1,422ms 4 Oct 2025 138th pardouin 🇫🇷 791 126 1,305ms 14 Aug 2025 139th namelessiw 791 150 399ms 11 Aug 2024 140th sean-niemann 🇺🇸 791 169 664ms 24 Sep 2025 141st lynn 790 241 121ms 3 Feb 2023 142nd Natanaelel 🇸🇪 788 85 2ms 12 Jan 2025 143rd sean-niemann 🇺🇸 788 165 19ms 9 Mar 2025 144th MeWhenI 🇻🇦 787 152 580ms 24 May 2024 145th MeWhenI 🇻🇦 783 138 1ms 5 Jul 2024 146th AlephSquirrel 783 166 16ms 10 Jun 2023 146th bricknellj 783 166 19ms 3 Apr 2025 148th pardouin 🇫🇷 782 122 35ms 22 Aug 2025 149th sean-niemann 🇺🇸 782 153 453ms 9 Mar 2025 150th MeWhenI 🇻🇦 782 187 138ms 28 Feb 2024 151st MeWhenI 🇻🇦 781 147 246ms 28 Feb 2024 152nd Yax42 🇫🇷 780 152 377ms 24 Nov 2025 153rd MeWhenI 🇻🇦 780 202 2ms 28 Feb 2024 154th MeWhenI 🇻🇦 779 128 1,266ms 14 Nov 2022 155th adyache 🇺🇸 779 216 56ms 28 Aug 2023 156th MeWhenI 🇻🇦 779 223 3ms 20 Jul 2023 157th lynn 778 167 10ms 13 Feb 2023 158th emplv 🇱🇻 777 153 4ms 10 Jan 2023 159th hallvabo 🇳🇴 774 168 25ms 8 Feb 2022 160th Yax42 🇫🇷 773 173 429ms 17 Dec 2025 First Prev 81–160 of 469 Next Last