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 stefangimmillaro 662 202 451ms 6 Oct 2025 242nd MarcMush 🇫🇷 660 168 594ms 14 Jan 2024 243rd rucin93 🇵🇱 660 185 13ms 19 Jul 2024 244th duckyluuk 🇳🇱 660 197 21ms 23 Jun 2024 245th lifthrasiir 🇰🇷 658 182 512ms 2 Dec 2024 246th nullie 657 198 10ms 14 Jun 2022 246th emgordon154 657 198 10ms 16 Oct 2025 248th stefangimmillaro 655 181 372ms 6 Oct 2025 249th MeWhenI 🇻🇦 653 170 133ms 16 days ago 250th Salutations45 653 187 9ms 15 Oct 2025 251st MeWhenI 🇻🇦 652 191 1ms 28 Feb 2024 252nd stefangimmillaro 649 147 38ms 12 May 2024 253rd emgordon154 648 241 6ms 29 Jun 2025 254th duckyluuk 🇳🇱 647 185 647ms 23 Jun 2024 254th snoozingnewt 🇨🇦 647 185 659ms 5 days ago 256th stefangimmillaro 647 255 135ms 24 Jul 2023 257th MostParsingVex 646 459 26ms 16 Jan 2025 258th stefangimmillaro 644 227 113ms 3 Oct 2023 259th emgordon154 643 186 531ms 12 Apr 2025 260th stefangimmillaro 643 273 162ms 17 Nov 2023 261st lynn 642 249 1,351ms 25 Oct 2021 262nd SirBogman 🇺🇸 640 149 38ms 31 Jan 2024 262nd tatzyr 🇯🇵 640 149 37ms 10 Mar 2025 264th blaztoma 🇱🇹 639 153 3ms 14 Dec 2025 265th orthoplex 🇨🇽 638 204 18ms 13 Oct 2021 266th jakobkordez 🇸🇮 635 205 18ms 30 Oct 2022 267th dcgjb 634 181 805ms 30 Jan 2024 268th AdrienHache 🇫🇷 631 188 398ms 25 Jul 2025 269th annaproxy 628 207 11ms 6 May 2022 269th StefanHabel 🇨🇦 628 207 11ms 9 Mar 2026 271st stefangimmillaro 627 159 1,268ms 20 Oct 2023 272nd error256 621 329 7ms 29 Jul 2024 273rd flekAI 620 193 514ms 6 hours ago 274th stefangimmillaro 620 195 2,634ms 12 Nov 2024 275th scpchicken 🇵🇼 619 210 19ms 3 days ago 276th targrik 618 193 5ms 4 days ago 277th OllieBoyne 🇬🇧 617 211 10ms 19 Aug 2022 278th DialFrost 🇸🇬 616 180 665ms 18 Jan 2024 279th annaproxy 616 309 129ms 4 Sep 2022 280th postie77 614 193 376ms 24 Mar 2023 281st Artemis21 🇬🇧 614 212 16ms 3 Jan 2025 282nd voytxt 🇨🇿 613 199 10ms 11 days ago 283rd Lv0Sys 🇵🇱 613 254 343ms 28 Feb 2026 284th InigoK 🇺🇸 608 214 18ms 22 Sep 2025 285th alexsave 607 201 9ms 3 Jan 2026 286th bac0id 607 208 447ms 25 Jun 2024 287th rucin93 🇵🇱 606 196 170ms 5 Jan 2025 288th mathisfun271 605 215 10ms 12 Feb 2024 288th anter69 🇭🇺 605 215 18ms 7 Jul 2025 290th TFeld00 🇩🇰 602 216 17ms 19 May 2022 290th andrewjc2000 602 216 29ms 15 May 2025 290th CornerMercury 🇬🇧 602 216 17ms 1 Dec 2025 293rd weliveinhell 🇭🇹 601 203 9ms 19 Jul 2024 293rd helbling 🇨🇭 601 203 10ms 6 Sep 2024 295th neel11235813 595 201 671ms 1 Apr 2024 296th ndren 594 219 28ms 22 Nov 2023 296th neel11235813 594 219 21ms 1 Apr 2024 298th DialFrost 🇸🇬 593 201 7ms 18 Jan 2024 299th DialFrost 🇸🇬 589 221 18ms 18 Jan 2024 299th BREMAUCY 🇫🇷 589 221 19ms 22 Aug 2025 301st MeWhenI 🇻🇦 588 272 1,305ms 14 Jun 2023 302nd KatieLG 🇬🇧 586 222 11ms 7 Jul 2024 303rd bac0id 585 185 1ms 25 Jun 2024 304th blaztoma 🇱🇹 581 281 115ms 28 Nov 2025 305th lynn 579 303 153ms 31 Mar 2022 306th jusaka 578 116 3ms 40 hours ago 307th dmrichwa 🇺🇸 578 211 12ms 17 Jun 2023 308th jared-hughes 576 135 33ms 25 May 2022 309th guilhem-roy 🇫🇷 573 227 10ms 3 Mar 2022 310th bac0id 570 208 395ms 25 Jun 2024 311th antimon2 🇯🇵 569 195 1,350ms 8 Mar 2024 312th janbehrens 🇩🇪 560 218 10ms 4 Dec 2024 313th stu303 558 233 11ms 20 Jul 2022 314th janAkali 🇷🇺 555 259 380ms 19 days ago 315th CaedenHarper 🇨🇦 553 218 1,265ms 2 Oct 2025 316th davecame 551 236 18ms 19 Mar 2024 317th JOrE20 550 222 9ms 23 Feb 2026 318th m42km 547 238 19ms 12 Nov 2023 318th firegene 🇮🇪 547 238 18ms 13 days ago 320th snoozingnewt 🇨🇦 546 302 125ms 20 Nov 2025 First Prev 241–320 of 487 Next Last