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 tayloia 🇬🇧 666 183 9ms 4 May 2023 227th MeWhenI 🇻🇦 666 418 14ms 17 Nov 2021 228th stefangimmillaro 662 202 437ms 6 Oct 2025 229th MarcMush 🇫🇷 660 168 612ms 14 Jan 2024 230th duckyluuk 🇳🇱 660 197 17ms 23 Jun 2024 231st rucin93 🇵🇱 659 185 9ms 19 Jul 2024 232nd lifthrasiir 🇰🇷 657 182 348ms 2 Dec 2024 233rd nullie 656 198 9ms 14 Jun 2022 233rd emgordon154 656 198 10ms 16 Oct 2025 235th stefangimmillaro 655 181 354ms 6 Oct 2025 236th snoozingnewt 🇨🇦 653 199 15ms 11 days ago 237th Salutations45 652 187 9ms 15 Oct 2025 238th MeWhenI 🇻🇦 652 191 2ms 28 Feb 2024 239th stefangimmillaro 648 147 40ms 12 May 2024 240th emgordon154 648 241 6ms 29 Jun 2025 241st stefangimmillaro 647 255 160ms 24 Jul 2023 242nd duckyluuk 🇳🇱 646 185 1,189ms 23 Jun 2024 243rd MostParsingVex 646 459 26ms 16 Jan 2025 244th snoozingnewt 🇨🇦 645 253 99ms 12 days ago 245th error256 645 329 7ms 29 Jul 2024 246th stefangimmillaro 644 227 99ms 3 Oct 2023 247th emgordon154 643 186 602ms 12 Apr 2025 248th lynn 642 249 1,329ms 25 Oct 2021 249th SirBogman 🇺🇸 640 149 40ms 31 Jan 2024 249th tatzyr 🇯🇵 640 149 44ms 10 Mar 2025 251st blaztoma 🇱🇹 639 153 3ms 3 days ago 252nd stefangimmillaro 639 273 160ms 17 Nov 2023 253rd orthoplex 🇨🇽 637 204 16ms 13 Oct 2021 254th dcgjb 634 181 765ms 30 Jan 2024 255th jakobkordez 🇸🇮 634 205 17ms 30 Oct 2022 256th MeWhenI 🇻🇦 631 176 126ms 4 Sep 2024 257th AdrienHache 🇫🇷 631 188 386ms 25 Jul 2025 258th annaproxy 628 207 10ms 6 May 2022 259th stefangimmillaro 627 159 1,164ms 20 Oct 2023 260th snoozingnewt 🇨🇦 626 191 637ms 11 days ago 261st StefanHabel 🇨🇦 625 208 11ms 8 Apr 2024 262nd DialFrost 🇸🇬 616 180 792ms 18 Jan 2024 263rd OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 264th annaproxy 616 309 129ms 4 Sep 2022 265th postie77 614 193 325ms 24 Mar 2023 266th stefangimmillaro 614 195 4,006ms 12 Nov 2024 267th Artemis21 🇬🇧 613 212 16ms 3 Jan 2025 268th bac0id 607 208 499ms 25 Jun 2024 269th InigoK 🇺🇸 607 214 16ms 22 Sep 2025 270th mathisfun271 605 215 9ms 12 Feb 2024 270th anter69 🇭🇺 605 215 16ms 7 Jul 2025 272nd rucin93 🇵🇱 604 196 141ms 5 Jan 2025 273rd TFeld00 🇩🇰 602 216 16ms 19 May 2022 273rd andrewjc2000 602 216 27ms 15 May 2025 273rd CornerMercury 🇬🇧 602 216 18ms 16 days ago 276th weliveinhell 🇭🇹 600 203 9ms 19 Jul 2024 276th helbling 🇨🇭 600 203 9ms 6 Sep 2024 278th neel11235813 595 201 1,061ms 1 Apr 2024 279th ndren 593 219 25ms 22 Nov 2023 279th neel11235813 593 219 19ms 1 Apr 2024 281st DialFrost 🇸🇬 591 201 5ms 18 Jan 2024 282nd voytxt 🇨🇿 591 206 9ms 15 Aug 2025 283rd DialFrost 🇸🇬 588 221 18ms 18 Jan 2024 283rd BREMAUCY 🇫🇷 588 221 16ms 22 Aug 2025 285th MeWhenI 🇻🇦 588 272 1,266ms 14 Jun 2023 286th scpchicken 🇵🇼 587 324 121ms 17 Mar 2023 287th KatieLG 🇬🇧 585 222 9ms 7 Jul 2024 288th bac0id 584 185 1ms 25 Jun 2024 289th blaztoma 🇱🇹 581 281 114ms 19 days ago 290th dmrichwa 🇺🇸 577 211 9ms 17 Jun 2023 291st jared-hughes 576 135 33ms 25 May 2022 292nd lynn 576 303 154ms 31 Mar 2022 293rd guilhem-roy 🇫🇷 573 227 11ms 3 Mar 2022 294th bac0id 570 208 334ms 25 Jun 2024 295th antimon2 🇯🇵 569 195 1,732ms 8 Mar 2024 296th scpchicken 🇵🇼 568 229 19ms 13 Oct 2023 297th janbehrens 🇩🇪 559 218 9ms 4 Dec 2024 298th stu303 558 233 10ms 20 Jul 2022 299th CaedenHarper 🇨🇦 553 218 846ms 2 Oct 2025 300th davecame 551 236 16ms 19 Mar 2024 First Prev 226–300 of 463 Next Last