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 snoozingnewt 🇨🇦 667 195 19ms 10 days ago 242nd stefangimmillaro 663 202 451ms 6 Oct 2025 243rd MarcMush 🇫🇷 662 168 594ms 14 Jan 2024 244th duckyluuk 🇳🇱 660 197 21ms 23 Jun 2024 245th MeWhenI 🇻🇦 659 170 133ms 21 days ago 246th lifthrasiir 🇰🇷 658 182 512ms 2 Dec 2024 247th nullie 657 198 10ms 14 Jun 2022 247th emgordon154 657 198 10ms 16 Oct 2025 249th stefangimmillaro 656 181 404ms 6 Oct 2025 250th MeWhenI 🇻🇦 656 191 1ms 28 Feb 2024 251st MostParsingVex 656 459 26ms 16 Jan 2025 252nd Salutations45 653 187 9ms 15 Oct 2025 253rd emgordon154 653 241 6ms 29 Jun 2025 254th stefangimmillaro 650 255 138ms 24 Jul 2023 255th stefangimmillaro 649 147 38ms 12 May 2024 256th stefangimmillaro 648 227 107ms 3 Oct 2023 257th duckyluuk 🇳🇱 647 185 647ms 23 Jun 2024 257th snoozingnewt 🇨🇦 647 185 659ms 10 days ago 257th jusaka 647 185 464ms 29 hours ago 260th emgordon154 644 186 531ms 12 Apr 2025 261st stefangimmillaro 643 273 164ms 17 Nov 2023 262nd SirBogman 🇺🇸 641 149 38ms 31 Jan 2024 262nd tatzyr 🇯🇵 641 149 37ms 10 Mar 2025 264th blaztoma 🇱🇹 640 153 3ms 14 Dec 2025 265th orthoplex 🇨🇽 638 204 18ms 13 Oct 2021 266th dcgjb 635 181 788ms 30 Jan 2024 267th jakobkordez 🇸🇮 635 205 18ms 30 Oct 2022 268th AdrienHache 🇫🇷 631 188 485ms 25 Jul 2025 269th stefangimmillaro 628 159 1,493ms 20 Oct 2023 270th annaproxy 628 207 11ms 6 May 2022 270th StefanHabel 🇨🇦 628 207 11ms 9 Mar 2026 272nd error256 627 329 7ms 29 Jul 2024 273rd stefangimmillaro 622 195 2,634ms 12 Nov 2024 274th flekAI 621 193 514ms 4 days ago 275th targrik 619 193 5ms 9 days ago 276th scpchicken 🇵🇼 619 210 19ms 8 days ago 277th annaproxy 619 309 129ms 4 Sep 2022 278th DialFrost 🇸🇬 618 180 639ms 18 Jan 2024 279th OllieBoyne 🇬🇧 617 211 10ms 19 Aug 2022 280th jusaka 615 109 3ms 2 days ago 281st postie77 615 193 406ms 24 Mar 2023 282nd Lv0Sys 🇵🇱 615 254 343ms 28 Feb 2026 283rd voytxt 🇨🇿 614 199 10ms 15 days ago 284th Artemis21 🇬🇧 614 212 16ms 3 Jan 2025 285th rucin93 🇵🇱 608 196 166ms 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 293rd CornerMercury 🇬🇧 602 216 17ms 1 Dec 2025 296th neel11235813 596 201 671ms 1 Apr 2024 297th DialFrost 🇸🇬 595 201 6ms 18 Jan 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 1,437ms 14 Jun 2023 303rd KatieLG 🇬🇧 586 222 11ms 7 Jul 2024 304th bac0id 585 185 1ms 25 Jun 2024 305th jusaka 580 297 16ms 23 hours 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 29 hours ago 310th guilhem-roy 🇫🇷 573 227 10ms 3 Mar 2022 311th bac0id 571 208 390ms 25 Jun 2024 312th antimon2 🇯🇵 570 195 1,350ms 8 Mar 2024 313th jusaka 566 214 826ms 29 hours ago 314th jusaka 566 497 16ms 28 hours ago 315th janbehrens 🇩🇪 560 218 10ms 4 Dec 2024 316th jusaka 559 256 89ms 28 hours ago 317th stu303 558 233 11ms 20 Jul 2022 318th janAkali 🇷🇺 558 259 380ms 24 days ago 319th CaedenHarper 🇨🇦 556 218 1,265ms 2 Oct 2025 320th davecame 551 236 18ms 19 Mar 2024 First Prev 241–320 of 532 Next Last