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 rucin93 🇵🇱 660 185 13ms 19 Jul 2024 242nd duckyluuk 🇳🇱 660 197 21ms 23 Jun 2024 243rd lifthrasiir 🇰🇷 657 182 512ms 2 Dec 2024 244th nullie 657 198 10ms 14 Jun 2022 244th emgordon154 657 198 10ms 16 Oct 2025 246th stefangimmillaro 655 181 372ms 6 Oct 2025 247th MeWhenI 🇻🇦 653 170 133ms 15 days ago 248th Salutations45 653 187 9ms 15 Oct 2025 249th MeWhenI 🇻🇦 652 191 1ms 28 Feb 2024 250th stefangimmillaro 649 147 38ms 12 May 2024 251st emgordon154 648 241 6ms 29 Jun 2025 252nd stefangimmillaro 647 255 135ms 24 Jul 2023 253rd duckyluuk 🇳🇱 646 185 647ms 23 Jun 2024 253rd snoozingnewt 🇨🇦 646 185 659ms 4 days ago 255th MostParsingVex 646 459 26ms 16 Jan 2025 256th stefangimmillaro 644 227 113ms 3 Oct 2023 257th emgordon154 643 186 531ms 12 Apr 2025 258th stefangimmillaro 643 273 162ms 17 Nov 2023 259th lynn 642 249 1,351ms 25 Oct 2021 260th SirBogman 🇺🇸 640 149 38ms 31 Jan 2024 260th tatzyr 🇯🇵 640 149 37ms 10 Mar 2025 262nd blaztoma 🇱🇹 639 153 3ms 14 Dec 2025 263rd orthoplex 🇨🇽 638 204 18ms 13 Oct 2021 263rd jusaka 638 204 10ms 13 hours ago 265th jakobkordez 🇸🇮 635 205 18ms 30 Oct 2022 266th dcgjb 634 181 805ms 30 Jan 2024 267th AdrienHache 🇫🇷 631 188 398ms 25 Jul 2025 268th annaproxy 628 207 11ms 6 May 2022 268th StefanHabel 🇨🇦 628 207 11ms 9 Mar 2026 270th stefangimmillaro 627 159 1,268ms 20 Oct 2023 271st error256 621 329 7ms 29 Jul 2024 272nd stefangimmillaro 620 195 2,634ms 12 Nov 2024 273rd scpchicken 🇵🇼 619 210 19ms 2 days ago 274th targrik 618 193 5ms 3 days ago 275th DialFrost 🇸🇬 616 180 665ms 18 Jan 2024 276th OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 277th annaproxy 616 309 129ms 4 Sep 2022 278th postie77 614 193 376ms 24 Mar 2023 279th Artemis21 🇬🇧 614 212 16ms 3 Jan 2025 280th voytxt 🇨🇿 613 199 10ms 10 days ago 281st Lv0Sys 🇵🇱 613 254 343ms 28 Feb 2026 282nd InigoK 🇺🇸 608 214 18ms 22 Sep 2025 283rd alexsave 607 201 9ms 3 Jan 2026 284th bac0id 607 208 447ms 25 Jun 2024 285th rucin93 🇵🇱 606 196 170ms 5 Jan 2025 286th mathisfun271 605 215 10ms 12 Feb 2024 286th anter69 🇭🇺 605 215 18ms 7 Jul 2025 288th TFeld00 🇩🇰 602 216 17ms 19 May 2022 288th andrewjc2000 602 216 29ms 15 May 2025 288th CornerMercury 🇬🇧 602 216 17ms 1 Dec 2025 291st weliveinhell 🇭🇹 601 203 9ms 19 Jul 2024 291st helbling 🇨🇭 601 203 10ms 6 Sep 2024 293rd neel11235813 595 201 671ms 1 Apr 2024 294th ndren 594 219 28ms 22 Nov 2023 294th neel11235813 594 219 21ms 1 Apr 2024 296th DialFrost 🇸🇬 593 201 7ms 18 Jan 2024 297th DialFrost 🇸🇬 589 221 18ms 18 Jan 2024 297th BREMAUCY 🇫🇷 589 221 19ms 22 Aug 2025 299th MeWhenI 🇻🇦 588 272 1,305ms 14 Jun 2023 300th KatieLG 🇬🇧 586 222 11ms 7 Jul 2024 301st bac0id 585 185 1ms 25 Jun 2024 302nd blaztoma 🇱🇹 581 281 115ms 28 Nov 2025 303rd lynn 579 303 153ms 31 Mar 2022 304th jusaka 578 116 3ms 11 hours ago 305th dmrichwa 🇺🇸 578 211 12ms 17 Jun 2023 306th jared-hughes 576 135 33ms 25 May 2022 307th guilhem-roy 🇫🇷 573 227 10ms 3 Mar 2022 308th bac0id 570 208 395ms 25 Jun 2024 309th antimon2 🇯🇵 569 195 1,350ms 8 Mar 2024 310th janbehrens 🇩🇪 560 218 10ms 4 Dec 2024 311th stu303 558 233 11ms 20 Jul 2022 312th janAkali 🇷🇺 555 259 380ms 18 days ago 313th CaedenHarper 🇨🇦 553 218 1,265ms 2 Oct 2025 314th davecame 551 236 18ms 19 Mar 2024 315th JOrE20 550 222 9ms 23 Feb 2026 316th m42km 547 238 19ms 12 Nov 2023 316th firegene 🇮🇪 547 238 18ms 12 days ago 318th snoozingnewt 🇨🇦 546 302 125ms 20 Nov 2025 319th CaedenHarper 🇨🇦 542 240 11ms 10 Aug 2025 320th DialFrost 🇸🇬 541 221 1ms 29 Jan 2024 First Prev 241–320 of 485 Next Last