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 duckyluuk 🇳🇱 660 197 17ms 23 Jun 2024 242nd lifthrasiir 🇰🇷 657 182 431ms 2 Dec 2024 243rd nullie 657 198 10ms 14 Jun 2022 243rd emgordon154 657 198 9ms 16 Oct 2025 245th stefangimmillaro 655 181 384ms 6 Oct 2025 246th MeWhenI 🇻🇦 653 170 133ms 12 days ago 247th Salutations45 653 187 9ms 15 Oct 2025 248th MeWhenI 🇻🇦 652 191 1ms 28 Feb 2024 249th stefangimmillaro 649 147 38ms 12 May 2024 250th emgordon154 648 241 6ms 29 Jun 2025 251st stefangimmillaro 647 255 135ms 24 Jul 2023 252nd duckyluuk 🇳🇱 646 185 617ms 23 Jun 2024 252nd snoozingnewt 🇨🇦 646 185 659ms 32 hours ago 254th MostParsingVex 646 459 26ms 16 Jan 2025 255th stefangimmillaro 644 227 113ms 3 Oct 2023 256th emgordon154 643 186 561ms 12 Apr 2025 257th lynn 642 249 1,351ms 25 Oct 2021 258th stefangimmillaro 641 273 162ms 17 Nov 2023 259th SirBogman 🇺🇸 640 149 38ms 31 Jan 2024 259th tatzyr 🇯🇵 640 149 37ms 10 Mar 2025 261st blaztoma 🇱🇹 639 153 3ms 14 Dec 2025 262nd orthoplex 🇨🇽 638 204 17ms 13 Oct 2021 263rd jakobkordez 🇸🇮 635 205 17ms 30 Oct 2022 264th dcgjb 634 181 862ms 30 Jan 2024 265th AdrienHache 🇫🇷 631 188 398ms 25 Jul 2025 266th annaproxy 628 207 10ms 6 May 2022 266th StefanHabel 🇨🇦 628 207 11ms 9 Mar 2026 268th stefangimmillaro 627 159 1,268ms 20 Oct 2023 269th error256 621 329 8ms 29 Jul 2024 270th stefangimmillaro 620 195 2,634ms 12 Nov 2024 271st targrik 618 193 5ms 10 hours ago 272nd DialFrost 🇸🇬 616 180 636ms 18 Jan 2024 273rd OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 274th annaproxy 616 309 129ms 4 Sep 2022 275th postie77 614 193 376ms 24 Mar 2023 276th Artemis21 🇬🇧 614 212 16ms 3 Jan 2025 277th voytxt 🇨🇿 613 199 10ms 7 days ago 278th Lv0Sys 🇵🇱 613 254 343ms 28 Feb 2026 279th scpchicken 🇵🇼 611 213 21ms 2 days ago 280th InigoK 🇺🇸 608 214 18ms 22 Sep 2025 281st alexsave 607 201 9ms 3 Jan 2026 282nd bac0id 607 208 422ms 25 Jun 2024 283rd rucin93 🇵🇱 606 196 154ms 5 Jan 2025 284th mathisfun271 605 215 10ms 12 Feb 2024 284th anter69 🇭🇺 605 215 16ms 7 Jul 2025 286th TFeld00 🇩🇰 602 216 16ms 19 May 2022 286th andrewjc2000 602 216 28ms 15 May 2025 286th CornerMercury 🇬🇧 602 216 16ms 1 Dec 2025 289th weliveinhell 🇭🇹 601 203 9ms 19 Jul 2024 289th helbling 🇨🇭 601 203 10ms 6 Sep 2024 291st neel11235813 595 201 670ms 1 Apr 2024 292nd ndren 594 219 26ms 22 Nov 2023 292nd neel11235813 594 219 19ms 1 Apr 2024 294th DialFrost 🇸🇬 593 201 4ms 18 Jan 2024 295th DialFrost 🇸🇬 589 221 18ms 18 Jan 2024 295th BREMAUCY 🇫🇷 589 221 17ms 22 Aug 2025 297th MeWhenI 🇻🇦 588 272 1,305ms 14 Jun 2023 298th KatieLG 🇬🇧 586 222 10ms 7 Jul 2024 298th jusaka 586 222 11ms 6 days ago 300th bac0id 585 185 1ms 25 Jun 2024 301st blaztoma 🇱🇹 581 281 122ms 28 Nov 2025 302nd dmrichwa 🇺🇸 578 211 12ms 17 Jun 2023 303rd lynn 578 303 153ms 31 Mar 2022 304th jared-hughes 576 135 33ms 25 May 2022 305th guilhem-roy 🇫🇷 573 227 10ms 3 Mar 2022 306th bac0id 570 208 395ms 25 Jun 2024 307th antimon2 🇯🇵 569 195 1,191ms 8 Mar 2024 308th janbehrens 🇩🇪 560 218 10ms 4 Dec 2024 309th stu303 558 233 9ms 20 Jul 2022 310th janAkali 🇷🇺 555 259 380ms 15 days ago 311th CaedenHarper 🇨🇦 553 218 1,265ms 2 Oct 2025 312th davecame 551 236 17ms 19 Mar 2024 313th JOrE20 550 222 9ms 23 Feb 2026 314th m42km 547 238 19ms 12 Nov 2023 314th firegene 🇮🇪 547 238 24ms 9 days ago 316th snoozingnewt 🇨🇦 546 302 125ms 20 Nov 2025 317th CaedenHarper 🇨🇦 542 240 10ms 10 Aug 2025 318th DialFrost 🇸🇬 541 221 1ms 29 Jan 2024 319th MichalMarsalek 🇨🇿 541 266 398ms 12 Oct 2023 320th KatieLG 🇬🇧 539 222 582ms 27 Oct 2024 First Prev 241–320 of 484 Next Last