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 emgordon154 648 241 6ms 29 Jun 2025 242nd stefangimmillaro 647 255 160ms 24 Jul 2023 243rd duckyluuk 🇳🇱 646 185 617ms 23 Jun 2024 244th MostParsingVex 646 459 26ms 16 Jan 2025 245th snoozingnewt 🇨🇦 645 253 108ms 5 Dec 2025 246th error256 645 329 7ms 29 Jul 2024 247th stefangimmillaro 644 227 122ms 3 Oct 2023 248th emgordon154 643 186 561ms 12 Apr 2025 249th lynn 642 249 1,444ms 25 Oct 2021 250th SirBogman 🇺🇸 640 149 40ms 31 Jan 2024 250th tatzyr 🇯🇵 640 149 35ms 10 Mar 2025 252nd blaztoma 🇱🇹 639 153 3ms 14 Dec 2025 253rd stefangimmillaro 639 273 151ms 17 Nov 2023 254th orthoplex 🇨🇽 637 204 17ms 13 Oct 2021 255th dcgjb 634 181 773ms 30 Jan 2024 256th jakobkordez 🇸🇮 634 205 18ms 30 Oct 2022 257th MeWhenI 🇻🇦 631 176 158ms 4 Sep 2024 258th AdrienHache 🇫🇷 631 188 438ms 25 Jul 2025 259th annaproxy 628 207 10ms 6 May 2022 260th stefangimmillaro 627 159 1,268ms 20 Oct 2023 261st snoozingnewt 🇨🇦 626 191 523ms 6 Dec 2025 262nd StefanHabel 🇨🇦 625 208 10ms 8 Apr 2024 263rd DialFrost 🇸🇬 616 180 639ms 18 Jan 2024 264th OllieBoyne 🇬🇧 616 211 10ms 19 Aug 2022 265th annaproxy 616 309 129ms 4 Sep 2022 266th postie77 614 193 406ms 24 Mar 2023 267th stefangimmillaro 614 195 2,511ms 12 Nov 2024 268th Artemis21 🇬🇧 613 212 18ms 3 Jan 2025 269th alexsave 607 201 9ms 3 Jan 2026 270th bac0id 607 208 394ms 25 Jun 2024 271st InigoK 🇺🇸 607 214 18ms 22 Sep 2025 272nd rucin93 🇵🇱 606 196 150ms 5 Jan 2025 273rd mathisfun271 605 215 11ms 12 Feb 2024 273rd anter69 🇭🇺 605 215 16ms 7 Jul 2025 275th TFeld00 🇩🇰 602 216 16ms 19 May 2022 275th andrewjc2000 602 216 28ms 15 May 2025 275th CornerMercury 🇬🇧 602 216 16ms 1 Dec 2025 278th weliveinhell 🇭🇹 601 203 9ms 19 Jul 2024 278th helbling 🇨🇭 601 203 8ms 6 Sep 2024 280th neel11235813 595 201 670ms 1 Apr 2024 281st ndren 594 219 26ms 22 Nov 2023 281st neel11235813 594 219 19ms 1 Apr 2024 283rd voytxt 🇨🇿 592 206 10ms 15 Aug 2025 284th DialFrost 🇸🇬 591 201 5ms 18 Jan 2024 285th DialFrost 🇸🇬 588 221 18ms 18 Jan 2024 285th BREMAUCY 🇫🇷 588 221 18ms 22 Aug 2025 287th MeWhenI 🇻🇦 588 272 1,356ms 14 Jun 2023 288th scpchicken 🇵🇼 587 324 121ms 17 Mar 2023 289th KatieLG 🇬🇧 586 222 10ms 7 Jul 2024 290th bac0id 584 185 1ms 25 Jun 2024 291st blaztoma 🇱🇹 581 281 129ms 28 Nov 2025 292nd dmrichwa 🇺🇸 578 211 9ms 17 Jun 2023 293rd jared-hughes 576 135 33ms 25 May 2022 294th lynn 576 303 156ms 31 Mar 2022 295th guilhem-roy 🇫🇷 573 227 10ms 3 Mar 2022 296th bac0id 570 208 368ms 25 Jun 2024 297th antimon2 🇯🇵 569 195 1,191ms 8 Mar 2024 298th scpchicken 🇵🇼 568 229 17ms 13 Oct 2023 299th janbehrens 🇩🇪 560 218 9ms 4 Dec 2024 300th stu303 558 233 9ms 20 Jul 2022 301st CaedenHarper 🇨🇦 553 218 1,344ms 2 Oct 2025 302nd davecame 551 236 20ms 19 Mar 2024 303rd m42km 546 238 23ms 12 Nov 2023 304th snoozingnewt 🇨🇦 546 302 115ms 20 Nov 2025 305th CaedenHarper 🇨🇦 542 240 11ms 10 Aug 2025 306th DialFrost 🇸🇬 541 221 1ms 29 Jan 2024 307th KatieLG 🇬🇧 539 222 582ms 27 Oct 2024 308th MichalMarsalek 🇨🇿 538 266 483ms 12 Oct 2023 309th commandz0 🇺🇸 537 242 11ms 27 Sep 2023 310th dokutan 535 243 17ms 9 Sep 2025 311th olleicua 🇺🇸 533 179 38ms 20 Feb 2025 312th bac0id 532 275 130ms 25 Jun 2024 313th alemelis 531 245 16ms 27 Aug 2024 314th m42km 529 226 747ms 4 Feb 2024 315th albanian-laundromat 527 229 906ms 16 Nov 2025 316th retrohun 527 259 61ms 23 Nov 2022 317th FlorianCassayre 🇫🇷 526 247 11ms 21 Oct 2023 317th janbehrens 🇩🇪 526 247 10ms 4 Dec 2024 319th CaedenHarper 🇨🇦 525 228 675ms 19 Jan 2025 319th commandz0 🇺🇸 525 228 610ms 1 Sep 2025 First Prev 241–320 of 469 Next Last