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 Dragon Curve 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 Dragon Curve 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 240th Lv0Sys 🇵🇱 671 182 10ms 28 Feb 2026 242nd jared-hughes 667 143 36ms 10 Sep 2022 243rd tayloia 🇬🇧 667 183 10ms 4 May 2023 244th snoozingnewt 🇨🇦 667 195 19ms 18 days ago 245th stefangimmillaro 663 202 475ms 6 Oct 2025 246th MarcMush 🇫🇷 662 168 594ms 14 Jan 2024 247th duckyluuk 🇳🇱 660 197 21ms 23 Jun 2024 248th MeWhenI 🇻🇦 659 170 133ms 27 Mar 2026 249th lifthrasiir 🇰🇷 658 182 512ms 2 Dec 2024 250th nullie 657 198 10ms 14 Jun 2022 250th emgordon154 657 198 10ms 16 Oct 2025 252nd stefangimmillaro 656 181 395ms 6 Oct 2025 253rd MeWhenI 🇻🇦 656 191 1ms 28 Feb 2024 254th CornerMercury 🇬🇧 654 199 16ms 6 days ago 255th Salutations45 653 187 10ms 15 Oct 2025 256th emgordon154 653 241 6ms 29 Jun 2025 257th stefangimmillaro 650 255 138ms 24 Jul 2023 258th stefangimmillaro 649 147 39ms 12 May 2024 259th stefangimmillaro 648 227 107ms 3 Oct 2023 260th duckyluuk 🇳🇱 647 185 647ms 23 Jun 2024 260th snoozingnewt 🇨🇦 647 185 659ms 18 days ago 260th jusaka 647 185 464ms 9 days ago 263rd emgordon154 643 186 531ms 12 Apr 2025 264th stefangimmillaro 643 273 164ms 17 Nov 2023 265th SirBogman 🇺🇸 641 149 41ms 31 Jan 2024 265th tatzyr 🇯🇵 641 149 37ms 10 Mar 2025 267th blaztoma 🇱🇹 640 153 3ms 14 Dec 2025 268th orthoplex 🇨🇽 638 204 18ms 13 Oct 2021 269th dcgjb 635 181 782ms 30 Jan 2024 270th jakobkordez 🇸🇮 635 205 18ms 30 Oct 2022 271st AdrienHache 🇫🇷 631 188 500ms 25 Jul 2025 272nd stefangimmillaro 628 159 1,302ms 20 Oct 2023 273rd annaproxy 628 207 11ms 6 May 2022 273rd StefanHabel 🇨🇦 628 207 11ms 9 Mar 2026 275th error256 627 329 7ms 29 Jul 2024 276th targrik 622 192 5ms 5 days ago 277th stefangimmillaro 622 195 2,521ms 12 Nov 2024 278th scpchicken 🇵🇼 619 210 19ms 16 days ago 279th annaproxy 619 309 129ms 4 Sep 2022 280th DialFrost 🇸🇬 618 180 639ms 18 Jan 2024 281st OllieBoyne 🇬🇧 617 211 10ms 19 Aug 2022 282nd jusaka 615 109 3ms 10 days ago 283rd postie77 615 193 409ms 24 Mar 2023 284th Lv0Sys 🇵🇱 615 254 343ms 28 Feb 2026 285th voytxt 🇨🇿 614 199 10ms 24 days ago 286th Artemis21 🇬🇧 614 212 16ms 3 Jan 2025 287th rucin93 🇵🇱 608 196 147ms 5 Jan 2025 288th alexsave 608 201 9ms 3 Jan 2026 289th bac0id 608 208 456ms 25 Jun 2024 290th InigoK 🇺🇸 608 214 18ms 22 Sep 2025 291st mathisfun271 605 215 10ms 12 Feb 2024 291st anter69 🇭🇺 605 215 18ms 7 Jul 2025 293rd weliveinhell 🇭🇹 602 203 10ms 19 Jul 2024 293rd helbling 🇨🇭 602 203 12ms 6 Sep 2024 295th TFeld00 🇩🇰 602 216 17ms 19 May 2022 295th andrewjc2000 602 216 29ms 15 May 2025 297th DialFrost 🇸🇬 595 201 6ms 18 Jan 2024 297th neel11235813 595 201 671ms 1 Apr 2024 299th ndren 594 219 28ms 22 Nov 2023 299th neel11235813 594 219 21ms 1 Apr 2024 301st DialFrost 🇸🇬 589 221 18ms 18 Jan 2024 301st BREMAUCY 🇫🇷 589 221 19ms 22 Aug 2025 303rd MeWhenI 🇻🇦 588 272 1,582ms 14 Jun 2023 304th KatieLG 🇬🇧 586 222 11ms 7 Jul 2024 305th bac0id 585 185 1ms 25 Jun 2024 306th jusaka 580 297 16ms 9 days ago 307th dmrichwa 🇺🇸 579 211 9ms 17 Jun 2023 308th lynn 579 303 162ms 31 Mar 2022 309th jared-hughes 576 135 33ms 25 May 2022 310th jusaka 576 212 10ms 9 days ago 311th guilhem-roy 🇫🇷 573 227 10ms 3 Mar 2022 312th bac0id 571 208 383ms 25 Jun 2024 313th antimon2 🇯🇵 570 195 1,350ms 8 Mar 2024 314th jusaka 566 214 1,373ms 9 days ago 315th jusaka 566 497 16ms 9 days ago 316th janAkali 🇷🇺 561 259 421ms 24 Mar 2026 317th janbehrens 🇩🇪 560 218 11ms 4 Dec 2024 318th jusaka 559 256 89ms 9 days ago 319th stu303 558 233 11ms 20 Jul 2022 320th CaedenHarper 🇨🇦 556 218 1,277ms 2 Oct 2025 First Prev 241–320 of 533 Next Last