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) Taxicab Numbers 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 Huffman Encoder 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 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) Taxicab Numbers 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 Huffman Encoder 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 Turtle Tutorial # Golfer Points Bytes Time Submitted 201st MeWhenI 🇻🇦 739 192 91ms 28 Feb 2024 202nd dvargas46 🇺🇸 737 185 24ms 7 Apr 2023 203rd NewDefectus 🇮🇱 731 167 10ms 21 Sep 2021 204th emplv 🇱🇻 729 163 148ms 28 Mar 2025 205th SirBogman 🇺🇸 729 164 571ms 31 Jan 2024 206th primo-ppcg 🇹🇭 728 131 36ms 28 Sep 2021 207th codereport 🇨🇦 727 107 36ms 72 mins ago 208th prplz 🇦🇺 727 179 10ms 13 Jan 2024 209th ovs-code 🇩🇪 725 153 800ms 10 Mar 2024 210th jared-hughes 723 180 17ms 9 Apr 2022 210th kg583 🇺🇸 723 180 18ms 28 Feb 2026 212th GrayJoKing 🇦🇺 720 156 150ms 2 Oct 2021 213th MeWhenI 🇻🇦 719 272 1,759ms 15 days ago 214th edsrzf 🇳🇿 715 218 335ms 16 Dec 2025 215th MeWhenI 🇻🇦 713 219 5ms 13 Aug 2024 216th MostParsingVex 713 416 30ms 11 days ago 217th MeWhenI 🇻🇦 709 138 3ms 28 Feb 2024 218th inventshah 709 178 445ms 12 Nov 2022 219th MeWhenI 🇻🇦 708 220 333ms 28 Feb 2024 220th SirBogman 🇺🇸 704 163 279ms 31 Jan 2024 221st vang1ong7ang 🇦🇶 703 185 9ms 6 days ago 222nd plcc0 699 186 17ms 20 Feb 2026 223rd inventshah 698 155 1ms 12 Nov 2022 224th jared-hughes 692 180 1ms 9 Apr 2022 225th MeWhenI 🇻🇦 691 172 136ms 5 Jan 2025 226th pardouin 🇫🇷 687 176 2,589ms 20 May 2025 227th inventshah 685 190 17ms 12 Nov 2022 227th stefangimmillaro 685 190 27ms 8 Aug 2023 227th lifthrasiir 🇰🇷 685 190 18ms 16 Nov 2024 230th MeWhenI 🇻🇦 684 623 13ms 27 Jan 2025 231st CLOStrophobic 🇮🇹 683 283 6ms 3 Mar 2025 232nd stefangimmillaro 680 229 328ms 18 Oct 2023 233rd MeWhenI 🇻🇦 679 176 2ms 28 Feb 2024 234th primo-ppcg 🇹🇭 679 201 14ms 24 Jan 2022 235th NewDefectus 🇮🇱 676 160 1ms 28 Dec 2021 236th inventshah 675 174 1ms 12 Nov 2022 237th Flekay 🇩🇪 674 193 10ms 27 Mar 2026 238th KrausRaus 🇺🇸 671 182 12ms 30 Jun 2024 238th Lv0Sys 🇵🇱 671 182 10ms 28 Feb 2026 240th jared-hughes 667 143 36ms 10 Sep 2022 241st tayloia 🇬🇧 667 183 10ms 4 May 2023 242nd snoozingnewt 🇨🇦 667 195 19ms 23 days ago 243rd MeWhenI 🇻🇦 666 418 14ms 17 Nov 2021 244th stefangimmillaro 662 202 465ms 6 Oct 2025 245th MarcMush 🇫🇷 660 168 594ms 14 Jan 2024 246th duckyluuk 🇳🇱 660 197 21ms 23 Jun 2024 247th lifthrasiir 🇰🇷 657 182 512ms 2 Dec 2024 248th nullie 657 198 10ms 14 Jun 2022 248th emgordon154 657 198 10ms 16 Oct 2025 250th stefangimmillaro 655 181 395ms 6 Oct 2025 251st CornerMercury 🇬🇧 654 199 16ms 11 days ago 252nd MeWhenI 🇻🇦 653 170 133ms 27 Mar 2026 253rd Salutations45 653 187 10ms 15 Oct 2025 254th MeWhenI 🇻🇦 652 191 1ms 28 Feb 2024 255th stefangimmillaro 649 147 39ms 12 May 2024 256th emgordon154 648 241 6ms 29 Jun 2025 257th stefangimmillaro 647 255 138ms 24 Jul 2023 258th duckyluuk 🇳🇱 646 185 647ms 23 Jun 2024 258th snoozingnewt 🇨🇦 646 185 659ms 23 days ago 260th stefangimmillaro 644 227 107ms 3 Oct 2023 261st emgordon154 643 186 531ms 12 Apr 2025 262nd stefangimmillaro 641 273 164ms 17 Nov 2023 263rd SirBogman 🇺🇸 640 149 41ms 31 Jan 2024 263rd tatzyr 🇯🇵 640 149 37ms 10 Mar 2025 265th blaztoma 🇱🇹 639 153 3ms 14 Dec 2025 266th orthoplex 🇨🇽 638 204 18ms 13 Oct 2021 267th jakobkordez 🇸🇮 635 205 18ms 30 Oct 2022 268th dcgjb 634 181 782ms 30 Jan 2024 269th AdrienHache 🇫🇷 631 188 500ms 25 Jul 2025 270th annaproxy 628 207 11ms 6 May 2022 270th StefanHabel 🇨🇦 628 207 11ms 9 Mar 2026 272nd stefangimmillaro 627 159 1,279ms 20 Oct 2023 273rd targrik 621 192 5ms 11 days ago 274th error256 621 329 7ms 29 Jul 2024 275th stefangimmillaro 620 195 2,497ms 12 Nov 2024 276th scpchicken 🇵🇼 619 210 19ms 22 days ago 277th DialFrost 🇸🇬 616 180 639ms 18 Jan 2024 278th voytxt 🇨🇿 616 198 10ms 46 hours ago 279th OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 280th annaproxy 616 309 129ms 4 Sep 2022 281st postie77 614 193 409ms 24 Mar 2023 282nd Artemis21 🇬🇧 614 212 16ms 3 Jan 2025 283rd Lv0Sys 🇵🇱 613 254 343ms 28 Feb 2026 284th InigoK 🇺🇸 608 214 18ms 22 Sep 2025 285th alexsave 607 201 9ms 3 Jan 2026 286th bac0id 607 208 456ms 25 Jun 2024 287th rucin93 🇵🇱 606 196 147ms 5 Jan 2025 288th mathisfun271 605 215 10ms 12 Feb 2024 288th anter69 🇭🇺 605 215 18ms 7 Jul 2025 290th TFeld00 🇩🇰 602 216 17ms 19 May 2022 290th andrewjc2000 602 216 29ms 15 May 2025 292nd weliveinhell 🇭🇹 601 203 11ms 19 Jul 2024 292nd helbling 🇨🇭 601 203 10ms 6 Sep 2024 294th neel11235813 595 201 671ms 1 Apr 2024 295th ndren 594 219 28ms 22 Nov 2023 295th neel11235813 594 219 21ms 1 Apr 2024 297th DialFrost 🇸🇬 593 201 6ms 18 Jan 2024 298th DialFrost 🇸🇬 589 221 18ms 18 Jan 2024 298th BREMAUCY 🇫🇷 589 221 19ms 22 Aug 2025 300th KatieLG 🇬🇧 586 222 10ms 7 Jul 2024 First Prev 201–300 of 485 Next Last