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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 226th MarcMush 🇫🇷 660 168 535ms 14 Jan 2024 227th duckyluuk 🇳🇱 660 197 17ms 23 Jun 2024 228th rucin93 🇵🇱 659 185 9ms 19 Jul 2024 229th lifthrasiir 🇰🇷 657 182 348ms 2 Dec 2024 230th nullie 656 198 9ms 14 Jun 2022 230th emgordon154 656 198 10ms 16 Oct 2025 232nd stefangimmillaro 654 181 354ms 6 Oct 2025 233rd snoozingnewt 🇨🇦 653 199 15ms 7 days ago 234th Salutations45 652 187 9ms 15 Oct 2025 235th MeWhenI 🇻🇦 652 191 2ms 28 Feb 2024 236th stefangimmillaro 648 147 34ms 12 May 2024 237th emgordon154 648 241 6ms 29 Jun 2025 238th stefangimmillaro 647 255 160ms 24 Jul 2023 239th duckyluuk 🇳🇱 646 185 1,189ms 23 Jun 2024 240th MostParsingVex 646 459 26ms 16 Jan 2025 241st snoozingnewt 🇨🇦 645 253 99ms 8 days ago 242nd error256 645 329 7ms 29 Jul 2024 243rd stefangimmillaro 644 227 99ms 3 Oct 2023 244th emgordon154 643 186 602ms 12 Apr 2025 245th lynn 642 249 1,329ms 25 Oct 2021 246th SirBogman 🇺🇸 640 149 37ms 31 Jan 2024 246th tatzyr 🇯🇵 640 149 32ms 10 Mar 2025 248th stefangimmillaro 639 273 160ms 17 Nov 2023 249th orthoplex 🇨🇽 637 204 16ms 13 Oct 2021 250th dcgjb 634 181 765ms 30 Jan 2024 251st jakobkordez 🇸🇮 634 205 17ms 30 Oct 2022 252nd MeWhenI 🇻🇦 631 176 126ms 4 Sep 2024 253rd AdrienHache 🇫🇷 630 188 386ms 25 Jul 2025 254th annaproxy 628 207 10ms 6 May 2022 255th stefangimmillaro 627 159 1,164ms 20 Oct 2023 256th snoozingnewt 🇨🇦 626 191 637ms 7 days ago 257th StefanHabel 🇨🇦 625 208 11ms 8 Apr 2024 258th DialFrost 🇸🇬 616 180 625ms 18 Jan 2024 259th OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 260th annaproxy 616 309 129ms 4 Sep 2022 261st postie77 614 193 325ms 24 Mar 2023 262nd stefangimmillaro 614 195 2,875ms 12 Nov 2024 263rd Artemis21 🇬🇧 613 212 16ms 3 Jan 2025 264th bac0id 607 208 381ms 25 Jun 2024 265th InigoK 🇺🇸 607 214 16ms 22 Sep 2025 265th blaztoma 🇱🇹 607 214 16ms 25 days ago 267th mathisfun271 605 215 9ms 12 Feb 2024 267th anter69 🇭🇺 605 215 16ms 7 Jul 2025 269th rucin93 🇵🇱 604 196 141ms 5 Jan 2025 270th TFeld00 🇩🇰 602 216 16ms 19 May 2022 270th andrewjc2000 602 216 27ms 15 May 2025 270th CornerMercury 🇬🇧 602 216 18ms 12 days ago 273rd weliveinhell 🇭🇹 600 203 9ms 19 Jul 2024 273rd helbling 🇨🇭 600 203 9ms 6 Sep 2024 275th neel11235813 595 201 1,061ms 1 Apr 2024 276th ndren 593 219 25ms 22 Nov 2023 276th neel11235813 593 219 19ms 1 Apr 2024 278th DialFrost 🇸🇬 591 201 5ms 18 Jan 2024 279th voytxt 🇨🇿 591 206 9ms 15 Aug 2025 280th DialFrost 🇸🇬 588 221 18ms 18 Jan 2024 280th BREMAUCY 🇫🇷 588 221 16ms 22 Aug 2025 282nd MeWhenI 🇻🇦 588 272 1,266ms 14 Jun 2023 283rd scpchicken 🇵🇼 587 324 121ms 17 Mar 2023 284th KatieLG 🇬🇧 585 222 9ms 7 Jul 2024 285th bac0id 584 185 1ms 25 Jun 2024 286th blaztoma 🇱🇹 581 281 114ms 15 days ago 287th dmrichwa 🇺🇸 577 211 9ms 17 Jun 2023 288th jared-hughes 576 135 33ms 25 May 2022 289th lynn 576 303 154ms 31 Mar 2022 290th guilhem-roy 🇫🇷 573 227 11ms 3 Mar 2022 291st antimon2 🇯🇵 569 195 1,206ms 8 Mar 2024 292nd bac0id 569 208 334ms 25 Jun 2024 293rd scpchicken 🇵🇼 568 229 19ms 13 Oct 2023 294th janbehrens 🇩🇪 559 218 9ms 4 Dec 2024 295th stu303 558 233 10ms 20 Jul 2022 296th CaedenHarper 🇨🇦 553 218 846ms 2 Oct 2025 297th davecame 551 236 16ms 19 Mar 2024 298th m42km 546 238 18ms 12 Nov 2023 299th snoozingnewt 🇨🇦 546 302 115ms 23 days ago 300th CaedenHarper 🇨🇦 542 240 11ms 10 Aug 2025 First Prev 226–300 of 460 Next Last