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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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL 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 ><> ALGOL 68 ArkScript 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 APL 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 101st nwellnhof 🇩🇪 825 391 56ms 9 Jul 2022 102nd Steffan153 🇫🇮 824 154 444ms 11 Aug 2024 103rd kg583 🇺🇸 824 246 42ms 17 Dec 2025 104th MeWhenI 🇻🇦 818 145 406ms 19 Jun 2025 105th MeWhenI 🇻🇦 816 146 5ms 28 Feb 2024 106th MeWhenI 🇻🇦 815 148 776ms 15 Sep 2025 107th MeWhenI 🇻🇦 815 364 25ms 30 Sep 2021 108th emplv 🇱🇻 814 150 10ms 29 Apr 2022 109th MeWhenI 🇻🇦 814 251 6ms 28 Feb 2024 110th Steffan153 🇫🇮 813 160 18ms 31 Jul 2024 110th Lv0Sys 🇵🇱 813 160 11ms 28 Feb 2026 112th UnderKoen 🇳🇱 812 608 4ms 11 Nov 2024 113th MeWhenI 🇻🇦 810 165 536ms 7 Nov 2025 114th edsrzf 🇳🇿 810 185 124ms 12 days ago 115th kg583 🇺🇸 809 285 84ms 34 hours ago 116th Steffan153 🇫🇮 808 147 138ms 11 Feb 2026 117th Steffan153 🇫🇮 808 148 598ms 31 Jul 2024 118th MeWhenI 🇻🇦 808 204 147ms 28 Feb 2024 119th MeWhenI 🇻🇦 808 290 31ms 6 Jun 2023 120th jared-hughes 807 134 2ms 30 Jan 2023 121st nwellnhof 🇩🇪 807 193 345ms 24 Sep 2021 122nd MeWhenI 🇻🇦 804 99 43ms 28 Feb 2024 123rd sean-niemann 🇺🇸 803 148 147ms 29 Oct 2024 124th Irratix 🇳🇱 803 152 10ms 6 May 2022 124th MeWhenI 🇻🇦 803 152 12ms 28 Feb 2024 124th vlpx 🇫🇮 803 152 10ms 1 Aug 2024 127th annaproxy 802 347 118ms 18 Sep 2023 128th primo-ppcg 🇹🇭 802 531 10ms 20 Jun 2025 129th sean-niemann 🇺🇸 801 148 418ms 11 Aug 2024 129th Steffan153 🇫🇮 801 148 431ms 11 Aug 2024 131st jared-hughes 799 158 65ms 30 Jan 2023 132nd vang1ong7ang 799 219 169ms 10 hours ago 133rd lifthrasiir 🇰🇷 798 84 2ms 6 Dec 2024 134th ryyyn 🇺🇸 798 163 19ms 9 Dec 2025 135th namelessiw 796 168 532ms 15 Nov 2025 135th Steffan153 🇫🇮 796 168 529ms 11 Feb 2026 137th stefangimmillaro 796 221 40ms 31 Jul 2023 138th GolfingSuccess 🇬🇷 793 164 18ms 18 Sep 2021 138th 5cw 🇺🇸 793 164 10ms 8 May 2024 140th MeWhenI 🇻🇦 792 223 3ms 28 Feb 2024 141st emgordon154 792 398 1,208ms 4 Oct 2025 142nd pardouin 🇫🇷 791 126 1,486ms 14 Aug 2025 143rd namelessiw 791 150 436ms 11 Aug 2024 144th sean-niemann 🇺🇸 791 169 569ms 24 Sep 2025 145th lynn 790 241 121ms 3 Feb 2023 146th Natanaelel 🇸🇪 788 85 2ms 12 Jan 2025 147th sean-niemann 🇺🇸 788 165 17ms 9 Mar 2025 148th snoozingnewt 🇨🇦 788 180 80ms 6 days ago 149th MeWhenI 🇻🇦 787 152 491ms 24 May 2024 150th MeWhenI 🇻🇦 784 138 1ms 5 Jul 2024 151st AlephSquirrel 784 166 13ms 10 Jun 2023 151st bricknellj 784 166 18ms 3 Apr 2025 153rd pardouin 🇫🇷 782 122 37ms 22 Aug 2025 154th sean-niemann 🇺🇸 782 153 507ms 9 Mar 2025 155th MeWhenI 🇻🇦 782 187 121ms 28 Feb 2024 156th AlephSquirrel 782 247 6ms 27 Jan 2025 157th MeWhenI 🇻🇦 781 147 285ms 28 Feb 2024 158th Yax42 🇫🇷 780 152 395ms 24 Nov 2025 159th MeWhenI 🇻🇦 780 202 2ms 28 Feb 2024 160th MeWhenI 🇻🇦 779 128 1,366ms 14 Nov 2022 161st emplv 🇱🇻 779 153 5ms 10 Jan 2023 162nd lynn 779 167 10ms 13 Feb 2023 163rd adyache 🇺🇸 779 216 61ms 28 Aug 2023 164th MeWhenI 🇻🇦 779 223 3ms 20 Jul 2023 165th hallvabo 🇳🇴 774 168 29ms 8 Feb 2022 166th Yax42 🇫🇷 773 173 756ms 17 Dec 2025 167th edsrzf 🇳🇿 773 210 4ms 16 Dec 2025 168th ovs-code 🇩🇪 772 140 1ms 10 Jul 2024 169th GolfingSuccess 🇬🇷 772 155 552ms 5 Aug 2025 170th rak1507 🇬🇧 770 87 2ms 31 Jan 2022 171st Steffan153 🇫🇮 769 124 38ms 31 Jul 2024 172nd ovs-code 🇩🇪 769 164 440ms 10 Jul 2024 173rd MeWhenI 🇻🇦 769 188 390ms 28 Feb 2024 174th scpchicken 🇵🇼 767 248 119ms 13 days ago 175th MeWhenI 🇻🇦 765 165 441ms 28 Feb 2024 176th Seek64 🇩🇪 765 170 13ms 27 Nov 2025 177th rotary-o 🇯🇵 764 175 405ms 8 May 2023 178th acotis 764 229 183ms 31 May 2025 179th edsrzf 🇳🇿 761 171 27ms 16 Dec 2025 180th lynn 757 158 524ms 17 Feb 2024 180th AlephSquirrel 757 158 454ms 12 Jan 2025 180th kg583 🇺🇸 757 158 604ms 28 Feb 2026 183rd MeWhenI 🇻🇦 757 256 64ms 28 Feb 2024 184th SirBogman 🇺🇸 756 172 17ms 31 Jan 2024 185th MeWhenI 🇻🇦 755 233 40ms 13 May 2023 186th MeWhenI 🇻🇦 754 181 23ms 28 Feb 2024 187th Irratix 🇳🇱 752 173 20ms 6 May 2022 188th SirBogman 🇺🇸 751 168 426ms 2 Jan 2022 189th SirBogman 🇺🇸 749 150 143ms 31 Jan 2024 190th MeWhenI 🇻🇦 748 157 1ms 28 Feb 2024 191st SirBogman 🇺🇸 747 104 32ms 28 Nov 2023 192nd SirBogman 🇺🇸 746 145 2ms 24 Nov 2021 192nd KasperKivimaeki 🇫🇮 746 145 863ms 14 Nov 2025 194th sean-niemann 🇺🇸 744 134 1,556ms 14 Aug 2025 195th MeWhenI 🇻🇦 744 149 412ms 28 Feb 2024 196th jared-hughes 744 164 9ms 9 Apr 2022 197th sean-niemann 🇺🇸 743 212 2ms 23 Jun 2025 198th Natanaelel 🇸🇪 740 105 34ms 20 Feb 2024 199th rucin93 🇵🇱 740 165 10ms 9 days ago 200th MeWhenI 🇻🇦 739 192 103ms 28 Feb 2024 First Prev 101–200 of 482 Next Last