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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator 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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator 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 241st jared-hughes 667 143 36ms 10 Sep 2022 242nd tayloia 🇬🇧 667 183 10ms 4 May 2023 243rd snoozingnewt 🇨🇦 667 195 19ms 15 days ago 244th stefangimmillaro 663 202 451ms 6 Oct 2025 245th MarcMush 🇫🇷 662 168 594ms 14 Jan 2024 246th duckyluuk 🇳🇱 660 197 21ms 23 Jun 2024 247th MeWhenI 🇻🇦 659 170 133ms 27 days ago 248th lifthrasiir 🇰🇷 658 182 512ms 2 Dec 2024 249th nullie 657 198 10ms 14 Jun 2022 249th emgordon154 657 198 10ms 16 Oct 2025 251st stefangimmillaro 656 181 395ms 6 Oct 2025 252nd MeWhenI 🇻🇦 656 191 1ms 28 Feb 2024 253rd CornerMercury 🇬🇧 654 199 16ms 3 days ago 254th Salutations45 653 187 9ms 15 Oct 2025 255th emgordon154 653 241 6ms 29 Jun 2025 256th stefangimmillaro 650 255 138ms 24 Jul 2023 257th stefangimmillaro 649 147 39ms 12 May 2024 258th stefangimmillaro 648 227 107ms 3 Oct 2023 259th duckyluuk 🇳🇱 647 185 647ms 23 Jun 2024 259th snoozingnewt 🇨🇦 647 185 659ms 15 days ago 259th jusaka 647 185 464ms 7 days ago 262nd emgordon154 643 186 531ms 12 Apr 2025 263rd stefangimmillaro 643 273 164ms 17 Nov 2023 264th SirBogman 🇺🇸 641 149 43ms 31 Jan 2024 264th tatzyr 🇯🇵 641 149 37ms 10 Mar 2025 266th blaztoma 🇱🇹 640 153 3ms 14 Dec 2025 267th orthoplex 🇨🇽 638 204 18ms 13 Oct 2021 268th dcgjb 635 181 782ms 30 Jan 2024 269th jakobkordez 🇸🇮 635 205 18ms 30 Oct 2022 270th AdrienHache 🇫🇷 631 188 500ms 25 Jul 2025 271st stefangimmillaro 628 159 1,493ms 20 Oct 2023 272nd annaproxy 628 207 11ms 6 May 2022 272nd StefanHabel 🇨🇦 628 207 11ms 9 Mar 2026 274th error256 627 329 7ms 29 Jul 2024 275th targrik 622 192 5ms 2 days ago 276th stefangimmillaro 622 195 2,634ms 12 Nov 2024 277th scpchicken 🇵🇼 619 210 19ms 14 days ago 278th annaproxy 619 309 129ms 4 Sep 2022 279th DialFrost 🇸🇬 618 180 639ms 18 Jan 2024 280th OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 281st jusaka 615 109 3ms 8 days ago 282nd postie77 615 193 409ms 24 Mar 2023 283rd Lv0Sys 🇵🇱 615 254 343ms 28 Feb 2026 284th voytxt 🇨🇿 614 199 10ms 21 days ago 285th Artemis21 🇬🇧 614 212 16ms 3 Jan 2025 286th rucin93 🇵🇱 608 196 147ms 5 Jan 2025 287th alexsave 608 201 11ms 3 Jan 2026 288th bac0id 608 208 456ms 25 Jun 2024 289th InigoK 🇺🇸 608 214 18ms 22 Sep 2025 290th mathisfun271 605 215 10ms 12 Feb 2024 290th anter69 🇭🇺 605 215 18ms 7 Jul 2025 292nd weliveinhell 🇭🇹 602 203 9ms 19 Jul 2024 292nd helbling 🇨🇭 602 203 10ms 6 Sep 2024 294th TFeld00 🇩🇰 602 216 17ms 19 May 2022 294th andrewjc2000 602 216 29ms 15 May 2025 296th DialFrost 🇸🇬 595 201 6ms 18 Jan 2024 296th neel11235813 595 201 671ms 1 Apr 2024 298th ndren 594 219 28ms 22 Nov 2023 298th neel11235813 594 219 21ms 1 Apr 2024 300th DialFrost 🇸🇬 589 221 18ms 18 Jan 2024 300th BREMAUCY 🇫🇷 589 221 19ms 22 Aug 2025 302nd MeWhenI 🇻🇦 588 272 1,582ms 14 Jun 2023 303rd KatieLG 🇬🇧 586 222 11ms 7 Jul 2024 304th bac0id 585 185 1ms 25 Jun 2024 305th jusaka 580 297 16ms 6 days ago 306th dmrichwa 🇺🇸 579 211 10ms 17 Jun 2023 307th lynn 579 303 162ms 31 Mar 2022 308th jared-hughes 576 135 33ms 25 May 2022 309th jusaka 576 212 10ms 7 days ago 310th guilhem-roy 🇫🇷 573 227 10ms 3 Mar 2022 311th bac0id 571 208 383ms 25 Jun 2024 312th antimon2 🇯🇵 570 195 1,350ms 8 Mar 2024 313th jusaka 566 214 826ms 7 days ago 314th jusaka 566 497 16ms 7 days ago 315th janbehrens 🇩🇪 560 218 10ms 4 Dec 2024 316th jusaka 559 256 89ms 7 days ago 317th stu303 558 233 11ms 20 Jul 2022 318th janAkali 🇷🇺 558 259 380ms 24 Mar 2026 319th CaedenHarper 🇨🇦 556 218 1,265ms 2 Oct 2025 320th davecame 551 236 18ms 19 Mar 2024 First Prev 241–320 of 531 Next Last