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 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 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 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 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 ><> 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 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 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 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 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 stefangimmillaro 649 147 36ms 12 May 2024 242nd emgordon154 648 241 6ms 29 Jun 2025 243rd stefangimmillaro 647 255 160ms 24 Jul 2023 244th duckyluuk 🇳🇱 646 185 617ms 23 Jun 2024 245th MostParsingVex 646 459 26ms 16 Jan 2025 246th snoozingnewt 🇨🇦 645 253 108ms 5 Dec 2025 247th error256 645 329 7ms 29 Jul 2024 248th stefangimmillaro 644 227 109ms 3 Oct 2023 249th emgordon154 643 186 561ms 12 Apr 2025 250th lynn 642 249 1,444ms 25 Oct 2021 251st SirBogman 🇺🇸 640 149 39ms 31 Jan 2024 251st tatzyr 🇯🇵 640 149 35ms 10 Mar 2025 253rd blaztoma 🇱🇹 639 153 3ms 14 Dec 2025 254th stefangimmillaro 639 273 160ms 17 Nov 2023 255th orthoplex 🇨🇽 637 204 17ms 13 Oct 2021 256th dcgjb 634 181 773ms 30 Jan 2024 257th jakobkordez 🇸🇮 634 205 17ms 30 Oct 2022 258th MeWhenI 🇻🇦 631 176 142ms 4 Sep 2024 259th AdrienHache 🇫🇷 631 188 438ms 25 Jul 2025 260th annaproxy 628 207 10ms 6 May 2022 261st stefangimmillaro 627 159 1,268ms 20 Oct 2023 262nd snoozingnewt 🇨🇦 626 191 523ms 6 Dec 2025 263rd StefanHabel 🇨🇦 625 208 10ms 8 Apr 2024 264th DialFrost 🇸🇬 616 180 636ms 18 Jan 2024 265th OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 266th annaproxy 616 309 129ms 4 Sep 2022 267th postie77 614 193 406ms 24 Mar 2023 268th stefangimmillaro 614 195 2,511ms 12 Nov 2024 269th Artemis21 🇬🇧 613 212 16ms 3 Jan 2025 270th InigoK 🇺🇸 608 214 18ms 22 Sep 2025 271st alexsave 607 201 9ms 3 Jan 2026 272nd bac0id 607 208 394ms 25 Jun 2024 273rd rucin93 🇵🇱 606 196 150ms 5 Jan 2025 274th mathisfun271 605 215 10ms 12 Feb 2024 274th anter69 🇭🇺 605 215 16ms 7 Jul 2025 276th TFeld00 🇩🇰 602 216 16ms 19 May 2022 276th andrewjc2000 602 216 28ms 15 May 2025 276th CornerMercury 🇬🇧 602 216 16ms 1 Dec 2025 279th weliveinhell 🇭🇹 601 203 11ms 19 Jul 2024 279th helbling 🇨🇭 601 203 10ms 6 Sep 2024 281st neel11235813 595 201 670ms 1 Apr 2024 282nd ndren 594 219 26ms 22 Nov 2023 282nd neel11235813 594 219 19ms 1 Apr 2024 284th voytxt 🇨🇿 592 206 10ms 15 Aug 2025 285th DialFrost 🇸🇬 591 201 4ms 18 Jan 2024 286th DialFrost 🇸🇬 588 221 18ms 18 Jan 2024 286th BREMAUCY 🇫🇷 588 221 17ms 22 Aug 2025 288th MeWhenI 🇻🇦 588 272 1,356ms 14 Jun 2023 289th scpchicken 🇵🇼 587 324 121ms 17 Mar 2023 290th KatieLG 🇬🇧 586 222 10ms 7 Jul 2024 290th Flekay 🇩🇪 586 222 10ms 5 days ago 292nd bac0id 584 185 1ms 25 Jun 2024 293rd blaztoma 🇱🇹 581 281 129ms 28 Nov 2025 294th dmrichwa 🇺🇸 578 211 10ms 17 Jun 2023 295th jared-hughes 576 135 33ms 25 May 2022 296th lynn 576 303 154ms 31 Mar 2022 297th guilhem-roy 🇫🇷 573 227 10ms 3 Mar 2022 298th bac0id 570 208 368ms 25 Jun 2024 299th antimon2 🇯🇵 569 195 1,191ms 8 Mar 2024 300th scpchicken 🇵🇼 568 229 17ms 13 Oct 2023 301st janbehrens 🇩🇪 560 218 10ms 4 Dec 2024 302nd stu303 558 233 9ms 20 Jul 2022 303rd CaedenHarper 🇨🇦 553 218 1,344ms 2 Oct 2025 304th davecame 551 236 17ms 19 Mar 2024 305th m42km 546 238 19ms 12 Nov 2023 306th snoozingnewt 🇨🇦 546 302 115ms 20 Nov 2025 307th CaedenHarper 🇨🇦 542 240 10ms 10 Aug 2025 308th DialFrost 🇸🇬 541 221 1ms 29 Jan 2024 309th JOrE20 540 226 8ms 32 hours ago 310th KatieLG 🇬🇧 539 222 582ms 27 Oct 2024 311th MichalMarsalek 🇨🇿 538 266 396ms 12 Oct 2023 312th commandz0 🇺🇸 537 242 10ms 27 Sep 2023 313th dokutan 535 243 17ms 9 Sep 2025 314th olleicua 🇺🇸 533 179 37ms 20 Feb 2025 315th bac0id 532 275 123ms 25 Jun 2024 316th alemelis 531 245 16ms 27 Aug 2024 317th m42km 529 226 651ms 4 Feb 2024 318th albanian-laundromat 527 229 906ms 16 Nov 2025 319th retrohun 527 259 61ms 23 Nov 2022 320th FlorianCassayre 🇫🇷 526 247 11ms 21 Oct 2023 First Prev 241–320 of 471 Next Last