QR Decoder in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Knight 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 F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 226th emgordon154 642 186 12 Apr 2025 227th lynn 642 249 25 Oct 2021 228th stefangimmillaro 642 255 24 Jul 2023 229th SirBogman 🇺🇸 640 149 31 Jan 2024 229th tatzyr 🇯🇵 640 149 10 Mar 2025 231st stefangimmillaro 639 273 17 Nov 2023 232nd orthoplex 🇨🇽 636 204 13 Oct 2021 233rd dcgjb 633 181 30 Jan 2024 234th jakobkordez 🇸🇮 633 205 30 Oct 2022 235th MeWhenI 🇻🇦 631 176 4 Sep 2024 236th AdrienHache 🇫🇷 628 188 25 Jul 2025 237th stefangimmillaro 627 159 20 Oct 2023 238th annaproxy 627 207 6 May 2022 239th StefanHabel 🇨🇦 624 208 8 Apr 2024 240th DialFrost 🇸🇬 616 180 18 Jan 2024 241st bac0id 616 257 25 Jun 2024 242nd annaproxy 616 309 4 Sep 2022 243rd OllieBoyne 🇬🇧 615 211 19 Aug 2022 244th stefangimmillaro 614 195 12 Nov 2024 245th postie77 612 193 24 Mar 2023 246th Artemis21 🇬🇧 612 212 3 Jan 2025 247th bac0id 607 208 25 Jun 2024 248th rucin93 🇵🇱 604 196 5 Jan 2025 249th mathisfun271 604 215 12 Feb 2024 249th anter69 🇭🇺 604 215 7 Jul 2025 251st TFeld00 🇩🇰 601 216 19 May 2022 251st andrewjc2000 601 216 15 May 2025 251st edsrzf 🇳🇿 601 216 6 Jul 2025 254th weliveinhell 🇭🇹 599 203 19 Jul 2024 254th helbling 🇨🇭 599 203 6 Sep 2024 256th neel11235813 594 201 1 Apr 2024 257th ndren 593 219 22 Nov 2023 257th neel11235813 593 219 1 Apr 2024 259th DialFrost 🇸🇬 591 201 18 Jan 2024 260th voytxt 🇨🇿 590 206 6 days ago 261st MeWhenI 🇻🇦 588 272 14 Jun 2023 262nd DialFrost 🇸🇬 587 221 18 Jan 2024 263rd scpchicken 🇵🇼 587 324 17 Mar 2023 264th KatieLG 🇬🇧 585 222 7 Jul 2024 265th bac0id 584 185 25 Jun 2024 266th edsrzf 🇳🇿 582 265 22 Jun 2025 267th jared-hughes 576 135 25 May 2022 268th dmrichwa 🇺🇸 576 211 17 Jun 2023 269th lynn 576 303 31 Mar 2022 270th guilhem-roy 🇫🇷 572 227 3 Mar 2022 271st antimon2 🇯🇵 569 195 8 Mar 2024 272nd bac0id 568 208 25 Jun 2024 273rd scpchicken 🇵🇼 567 229 13 Oct 2023 273rd ryyyn 🇺🇸 567 229 23 Jul 2025 275th janbehrens 🇩🇪 558 218 4 Dec 2024 276th stu303 557 233 20 Jul 2022 277th davecame 550 236 19 Mar 2024 278th DialFrost 🇸🇬 548 221 29 Jan 2024 279th m42km 545 238 12 Nov 2023 280th InigoK 🇺🇸 541 240 11 Jun 2023 280th CaedenHarper 🇨🇦 541 240 11 days ago 282nd KatieLG 🇬🇧 538 222 27 Oct 2024 283rd MichalMarsalek 🇨🇿 538 266 12 Oct 2023 284th commandblockguy 🇺🇸 536 242 27 Sep 2023 285th olleicua 🇺🇸 532 179 20 Feb 2025 286th bac0id 532 275 25 Jun 2024 287th alemelis 530 245 27 Aug 2024 287th CornerMercury 🇬🇧 530 245 2 Mar 2025 289th m42km 528 226 4 Feb 2024 290th dokutan 528 246 24 Feb 2025 291st retrohun 527 259 23 Nov 2022 292nd FlorianCassayre 🇫🇷 526 247 21 Oct 2023 292nd janbehrens 🇩🇪 526 247 4 Dec 2024 294th janbehrens 🇩🇪 526 301 4 Dec 2024 295th CaedenHarper 🇨🇦 524 228 19 Jan 2025 296th Natanaelel 🇸🇪 524 363 16 Jun 2025 297th Natanaelel 🇸🇪 521 183 18 Feb 2024 298th rucin93 🇵🇱 519 250 21 Jan 2024 299th coreynash 515 236 13 Feb 2024 300th DialFrost 🇸🇬 511 367 27 Sep 2024 Prev 226–300 of 425 Next