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 tayloia 🇬🇧 667 183 10ms 4 May 2023 242nd snoozingnewt 🇨🇦 667 195 19ms 12 days ago 243rd stefangimmillaro 663 202 451ms 6 Oct 2025 244th MarcMush 🇫🇷 662 168 594ms 14 Jan 2024 245th duckyluuk 🇳🇱 660 197 21ms 23 Jun 2024 246th MeWhenI 🇻🇦 659 170 133ms 24 days ago 247th lifthrasiir 🇰🇷 658 182 512ms 2 Dec 2024 248th nullie 657 198 10ms 14 Jun 2022 248th emgordon154 657 198 10ms 16 Oct 2025 250th stefangimmillaro 656 181 404ms 6 Oct 2025 251st MeWhenI 🇻🇦 656 191 1ms 28 Feb 2024 252nd CornerMercury 🇬🇧 654 199 16ms 13 hours ago 253rd Salutations45 653 187 9ms 15 Oct 2025 254th emgordon154 653 241 6ms 29 Jun 2025 255th stefangimmillaro 650 255 138ms 24 Jul 2023 256th stefangimmillaro 649 147 38ms 12 May 2024 257th stefangimmillaro 648 227 107ms 3 Oct 2023 258th duckyluuk 🇳🇱 647 185 647ms 23 Jun 2024 258th snoozingnewt 🇨🇦 647 185 659ms 12 days ago 258th jusaka 647 185 464ms 4 days ago 261st emgordon154 643 186 531ms 12 Apr 2025 262nd stefangimmillaro 643 273 164ms 17 Nov 2023 263rd SirBogman 🇺🇸 641 149 38ms 31 Jan 2024 263rd tatzyr 🇯🇵 641 149 37ms 10 Mar 2025 265th blaztoma 🇱🇹 640 153 3ms 14 Dec 2025 266th orthoplex 🇨🇽 638 204 18ms 13 Oct 2021 267th dcgjb 635 181 788ms 30 Jan 2024 268th jakobkordez 🇸🇮 635 205 18ms 30 Oct 2022 269th AdrienHache 🇫🇷 631 188 485ms 25 Jul 2025 270th stefangimmillaro 628 159 1,493ms 20 Oct 2023 271st annaproxy 628 207 11ms 6 May 2022 271st StefanHabel 🇨🇦 628 207 11ms 9 Mar 2026 273rd error256 627 329 7ms 29 Jul 2024 274th stefangimmillaro 622 195 2,634ms 12 Nov 2024 275th targrik 619 193 5ms 11 days ago 276th scpchicken 🇵🇼 619 210 19ms 11 days ago 277th annaproxy 619 309 129ms 4 Sep 2022 278th DialFrost 🇸🇬 618 180 639ms 18 Jan 2024 279th OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 280th jusaka 615 109 3ms 5 days ago 281st postie77 615 193 406ms 24 Mar 2023 282nd Lv0Sys 🇵🇱 615 254 343ms 28 Feb 2026 283rd voytxt 🇨🇿 614 199 10ms 18 days ago 284th Artemis21 🇬🇧 614 212 16ms 3 Jan 2025 285th rucin93 🇵🇱 608 196 155ms 5 Jan 2025 286th alexsave 608 201 11ms 3 Jan 2026 287th bac0id 608 208 447ms 25 Jun 2024 288th InigoK 🇺🇸 608 214 18ms 22 Sep 2025 289th mathisfun271 605 215 10ms 12 Feb 2024 289th anter69 🇭🇺 605 215 18ms 7 Jul 2025 291st weliveinhell 🇭🇹 602 203 9ms 19 Jul 2024 291st helbling 🇨🇭 602 203 10ms 6 Sep 2024 293rd TFeld00 🇩🇰 602 216 17ms 19 May 2022 293rd andrewjc2000 602 216 29ms 15 May 2025 295th DialFrost 🇸🇬 595 201 6ms 18 Jan 2024 295th neel11235813 595 201 671ms 1 Apr 2024 297th ndren 594 219 28ms 22 Nov 2023 297th neel11235813 594 219 21ms 1 Apr 2024 299th DialFrost 🇸🇬 589 221 18ms 18 Jan 2024 299th BREMAUCY 🇫🇷 589 221 19ms 22 Aug 2025 301st MeWhenI 🇻🇦 588 272 1,437ms 14 Jun 2023 302nd KatieLG 🇬🇧 586 222 11ms 7 Jul 2024 303rd bac0id 585 185 1ms 25 Jun 2024 304th jusaka 580 297 16ms 3 days ago 305th dmrichwa 🇺🇸 579 211 10ms 17 Jun 2023 306th lynn 579 303 162ms 31 Mar 2022 307th jared-hughes 576 135 33ms 25 May 2022 308th jusaka 576 212 10ms 4 days ago 309th guilhem-roy 🇫🇷 573 227 10ms 3 Mar 2022 310th bac0id 571 208 390ms 25 Jun 2024 311th antimon2 🇯🇵 570 195 1,350ms 8 Mar 2024 312th jusaka 566 214 826ms 4 days ago 313th jusaka 566 497 16ms 4 days ago 314th janbehrens 🇩🇪 560 218 10ms 4 Dec 2024 315th jusaka 559 256 89ms 4 days ago 316th stu303 558 233 11ms 20 Jul 2022 317th janAkali 🇷🇺 558 259 380ms 26 days ago 318th CaedenHarper 🇨🇦 556 218 1,265ms 2 Oct 2025 319th davecame 551 236 18ms 19 Mar 2024 320th JOrE20 550 222 13ms 23 Feb 2026 First Prev 241–320 of 531 Next Last