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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 241st snoozingnewt 🇨🇦 653 199 17ms 6 Dec 2025 242nd Salutations45 652 187 9ms 15 Oct 2025 243rd MeWhenI 🇻🇦 652 191 1ms 28 Feb 2024 244th stefangimmillaro 649 147 36ms 12 May 2024 245th emgordon154 648 241 6ms 29 Jun 2025 246th stefangimmillaro 647 255 173ms 24 Jul 2023 247th duckyluuk 🇳🇱 646 185 617ms 23 Jun 2024 248th MostParsingVex 646 459 26ms 16 Jan 2025 249th error256 645 329 7ms 29 Jul 2024 250th stefangimmillaro 644 227 109ms 3 Oct 2023 251st emgordon154 643 186 561ms 12 Apr 2025 252nd lynn 642 249 1,444ms 25 Oct 2021 253rd SirBogman 🇺🇸 640 149 39ms 31 Jan 2024 253rd tatzyr 🇯🇵 640 149 35ms 10 Mar 2025 255th blaztoma 🇱🇹 639 153 3ms 14 Dec 2025 256th stefangimmillaro 639 273 160ms 17 Nov 2023 257th orthoplex 🇨🇽 637 204 17ms 13 Oct 2021 258th dcgjb 634 181 773ms 30 Jan 2024 259th jakobkordez 🇸🇮 634 205 17ms 30 Oct 2022 260th MeWhenI 🇻🇦 631 176 142ms 4 Sep 2024 261st AdrienHache 🇫🇷 631 188 438ms 25 Jul 2025 262nd annaproxy 628 207 10ms 6 May 2022 263rd stefangimmillaro 627 159 1,268ms 20 Oct 2023 264th snoozingnewt 🇨🇦 626 191 523ms 6 Dec 2025 265th StefanHabel 🇨🇦 625 208 10ms 8 Apr 2024 266th DialFrost 🇸🇬 616 180 636ms 18 Jan 2024 267th OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 268th annaproxy 616 309 129ms 4 Sep 2022 269th postie77 614 193 406ms 24 Mar 2023 270th stefangimmillaro 614 195 2,511ms 12 Nov 2024 271st Artemis21 🇬🇧 613 212 16ms 3 Jan 2025 272nd Lv0Sys 🇵🇱 613 254 268ms 21 hours ago 273rd InigoK 🇺🇸 608 214 18ms 22 Sep 2025 274th alexsave 607 201 9ms 3 Jan 2026 275th bac0id 607 208 424ms 25 Jun 2024 276th rucin93 🇵🇱 606 196 150ms 5 Jan 2025 277th mathisfun271 605 215 10ms 12 Feb 2024 277th anter69 🇭🇺 605 215 16ms 7 Jul 2025 279th TFeld00 🇩🇰 602 216 16ms 19 May 2022 279th andrewjc2000 602 216 28ms 15 May 2025 279th CornerMercury 🇬🇧 602 216 16ms 1 Dec 2025 282nd weliveinhell 🇭🇹 601 203 9ms 19 Jul 2024 282nd helbling 🇨🇭 601 203 9ms 6 Sep 2024 284th neel11235813 595 201 670ms 1 Apr 2024 285th ndren 594 219 26ms 22 Nov 2023 285th neel11235813 594 219 19ms 1 Apr 2024 287th voytxt 🇨🇿 592 206 9ms 15 Aug 2025 288th DialFrost 🇸🇬 591 201 4ms 18 Jan 2024 289th DialFrost 🇸🇬 588 221 18ms 18 Jan 2024 289th BREMAUCY 🇫🇷 588 221 17ms 22 Aug 2025 291st MeWhenI 🇻🇦 588 272 1,356ms 14 Jun 2023 292nd scpchicken 🇵🇼 587 324 121ms 17 Mar 2023 293rd KatieLG 🇬🇧 586 222 10ms 7 Jul 2024 293rd Flekay 🇩🇪 586 222 10ms 13 days ago 295th bac0id 584 185 1ms 25 Jun 2024 296th blaztoma 🇱🇹 581 281 129ms 28 Nov 2025 297th dmrichwa 🇺🇸 578 211 9ms 17 Jun 2023 298th jared-hughes 576 135 33ms 25 May 2022 299th lynn 576 303 154ms 31 Mar 2022 300th guilhem-roy 🇫🇷 573 227 10ms 3 Mar 2022 301st bac0id 570 208 368ms 25 Jun 2024 302nd antimon2 🇯🇵 569 195 1,191ms 8 Mar 2024 303rd scpchicken 🇵🇼 568 229 17ms 13 Oct 2023 304th janbehrens 🇩🇪 560 218 11ms 4 Dec 2024 305th stu303 558 233 9ms 20 Jul 2022 306th CaedenHarper 🇨🇦 553 218 1,344ms 2 Oct 2025 307th davecame 551 236 17ms 19 Mar 2024 308th JOrE20 549 222 9ms 5 days ago 309th m42km 546 238 19ms 12 Nov 2023 310th snoozingnewt 🇨🇦 546 302 136ms 20 Nov 2025 311th CaedenHarper 🇨🇦 542 240 10ms 10 Aug 2025 312th DialFrost 🇸🇬 541 221 1ms 29 Jan 2024 313th KatieLG 🇬🇧 539 222 582ms 27 Oct 2024 314th MichalMarsalek 🇨🇿 538 266 410ms 12 Oct 2023 315th commandz0 🇺🇸 537 242 10ms 27 Sep 2023 316th dokutan 535 243 17ms 9 Sep 2025 317th olleicua 🇺🇸 533 179 37ms 20 Feb 2025 318th bac0id 532 275 123ms 25 Jun 2024 319th alemelis 531 245 16ms 27 Aug 2024 319th AstroOrbis 531 245 18ms 6 days ago First Prev 241–320 of 472 Next Last