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 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 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 duckyluuk 🇳🇱 660 197 16ms 23 Jun 2024 227th rucin93 🇵🇱 659 185 9ms 19 Jul 2024 228th lifthrasiir 🇰🇷 657 182 436ms 2 Dec 2024 229th nullie 656 198 10ms 14 Jun 2022 229th emgordon154 656 198 10ms 16 Oct 2025 231st stefangimmillaro 654 181 328ms 6 Oct 2025 232nd snoozingnewt 🇨🇦 653 199 16ms 28 mins ago 233rd Salutations45 652 187 9ms 15 Oct 2025 234th MeWhenI 🇻🇦 652 191 2ms 28 Feb 2024 235th stefangimmillaro 648 147 41ms 12 May 2024 236th emgordon154 648 241 6ms 29 Jun 2025 237th stefangimmillaro 647 255 164ms 24 Jul 2023 238th duckyluuk 🇳🇱 646 185 1,301ms 23 Jun 2024 239th MostParsingVex 646 459 28ms 16 Jan 2025 240th snoozingnewt 🇨🇦 645 253 98ms 24 hours ago 241st error256 645 329 6ms 29 Jul 2024 242nd stefangimmillaro 644 227 98ms 3 Oct 2023 243rd emgordon154 643 186 616ms 12 Apr 2025 244th lynn 642 249 1,355ms 25 Oct 2021 245th SirBogman 🇺🇸 640 149 38ms 31 Jan 2024 245th tatzyr 🇯🇵 640 149 34ms 10 Mar 2025 247th stefangimmillaro 639 273 158ms 17 Nov 2023 248th orthoplex 🇨🇽 637 204 17ms 13 Oct 2021 249th dcgjb 634 181 744ms 30 Jan 2024 250th jakobkordez 🇸🇮 634 205 16ms 30 Oct 2022 251st MeWhenI 🇻🇦 631 176 139ms 4 Sep 2024 252nd AdrienHache 🇫🇷 630 188 387ms 25 Jul 2025 253rd annaproxy 628 207 10ms 6 May 2022 254th stefangimmillaro 627 159 1,169ms 20 Oct 2023 255th snoozingnewt 🇨🇦 626 191 632ms 28 mins ago 256th StefanHabel 🇨🇦 625 208 11ms 8 Apr 2024 257th DialFrost 🇸🇬 616 180 625ms 18 Jan 2024 258th OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 259th annaproxy 616 309 146ms 4 Sep 2022 260th postie77 614 193 331ms 24 Mar 2023 261st stefangimmillaro 614 195 2,931ms 12 Nov 2024 262nd Artemis21 🇬🇧 613 212 17ms 3 Jan 2025 263rd bac0id 607 208 389ms 25 Jun 2024 264th InigoK 🇺🇸 607 214 15ms 22 Sep 2025 264th blaztoma 🇱🇹 607 214 17ms 18 days ago 266th mathisfun271 605 215 10ms 12 Feb 2024 266th anter69 🇭🇺 605 215 15ms 7 Jul 2025 268th rucin93 🇵🇱 604 196 143ms 5 Jan 2025 269th TFeld00 🇩🇰 602 216 16ms 19 May 2022 269th andrewjc2000 602 216 26ms 15 May 2025 269th CornerMercury 🇬🇧 602 216 23ms 5 days ago 272nd weliveinhell 🇭🇹 600 203 9ms 19 Jul 2024 272nd helbling 🇨🇭 600 203 9ms 6 Sep 2024 274th neel11235813 595 201 1,185ms 1 Apr 2024 275th ndren 593 219 25ms 22 Nov 2023 275th neel11235813 593 219 21ms 1 Apr 2024 277th DialFrost 🇸🇬 591 201 4ms 18 Jan 2024 278th voytxt 🇨🇿 591 206 9ms 15 Aug 2025 279th DialFrost 🇸🇬 588 221 16ms 18 Jan 2024 279th BREMAUCY 🇫🇷 588 221 17ms 22 Aug 2025 281st MeWhenI 🇻🇦 588 272 1,257ms 14 Jun 2023 282nd scpchicken 🇵🇼 587 324 149ms 17 Mar 2023 283rd KatieLG 🇬🇧 585 222 9ms 7 Jul 2024 284th bac0id 584 185 2ms 25 Jun 2024 285th blaztoma 🇱🇹 581 281 107ms 8 days ago 286th dmrichwa 🇺🇸 577 211 9ms 17 Jun 2023 287th jared-hughes 576 135 40ms 25 May 2022 288th lynn 576 303 152ms 31 Mar 2022 289th guilhem-roy 🇫🇷 573 227 9ms 3 Mar 2022 290th antimon2 🇯🇵 569 195 1,207ms 8 Mar 2024 291st bac0id 569 208 341ms 25 Jun 2024 292nd scpchicken 🇵🇼 568 229 17ms 13 Oct 2023 293rd janbehrens 🇩🇪 559 218 9ms 4 Dec 2024 294th stu303 558 233 9ms 20 Jul 2022 295th CaedenHarper 🇨🇦 553 218 867ms 2 Oct 2025 296th davecame 551 236 18ms 19 Mar 2024 297th m42km 546 238 19ms 12 Nov 2023 298th snoozingnewt 🇨🇦 546 302 121ms 15 days ago 299th CaedenHarper 🇨🇦 542 240 10ms 10 Aug 2025 300th DialFrost 🇸🇬 541 221 1ms 29 Jan 2024 First Prev 226–300 of 459 Next Last