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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 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 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 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 Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 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 Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 226th MarcMush 🇫🇷 660 168 586ms 14 Jan 2024 227th duckyluuk 🇳🇱 660 197 16ms 23 Jun 2024 228th rucin93 🇵🇱 658 185 9ms 19 Jul 2024 229th lifthrasiir 🇰🇷 657 182 445ms 2 Dec 2024 230th nullie 656 198 9ms 14 Jun 2022 230th emgordon154 656 198 10ms 16 Oct 2025 232nd stefangimmillaro 654 181 328ms 6 Oct 2025 233rd MeWhenI 🇻🇦 652 191 2ms 28 Feb 2024 234th Salutations45 651 187 9ms 15 Oct 2025 235th stefangimmillaro 648 147 41ms 12 May 2024 236th emgordon154 648 241 6ms 29 Jun 2025 237th stefangimmillaro 647 255 164ms 24 Jul 2023 238th duckyluuk 🇳🇱 646 185 1,333ms 23 Jun 2024 239th MostParsingVex 646 459 28ms 16 Jan 2025 240th error256 645 329 6ms 29 Jul 2024 241st stefangimmillaro 644 227 104ms 3 Oct 2023 242nd emgordon154 642 186 880ms 12 Apr 2025 243rd lynn 642 249 1,387ms 25 Oct 2021 244th SirBogman 🇺🇸 640 149 38ms 31 Jan 2024 244th tatzyr 🇯🇵 640 149 34ms 10 Mar 2025 246th stefangimmillaro 639 273 158ms 17 Nov 2023 247th orthoplex 🇨🇽 637 204 16ms 13 Oct 2021 248th dcgjb 634 181 744ms 30 Jan 2024 249th jakobkordez 🇸🇮 634 205 16ms 30 Oct 2022 250th MeWhenI 🇻🇦 631 176 139ms 4 Sep 2024 251st AdrienHache 🇫🇷 630 188 387ms 25 Jul 2025 252nd annaproxy 628 207 10ms 6 May 2022 253rd stefangimmillaro 627 159 1,169ms 20 Oct 2023 254th StefanHabel 🇨🇦 625 208 10ms 8 Apr 2024 255th DialFrost 🇸🇬 616 180 625ms 18 Jan 2024 256th OllieBoyne 🇬🇧 616 211 9ms 19 Aug 2022 257th annaproxy 616 309 146ms 4 Sep 2022 258th postie77 614 193 331ms 24 Mar 2023 259th stefangimmillaro 614 195 2,931ms 12 Nov 2024 260th Artemis21 🇬🇧 613 212 15ms 3 Jan 2025 261st bac0id 607 208 361ms 25 Jun 2024 262nd InigoK 🇺🇸 607 214 16ms 22 Sep 2025 262nd blaztoma 🇱🇹 607 214 16ms 10 days ago 264th rucin93 🇵🇱 604 196 143ms 5 Jan 2025 265th mathisfun271 604 215 10ms 12 Feb 2024 265th anter69 🇭🇺 604 215 15ms 7 Jul 2025 267th TFeld00 🇩🇰 601 216 15ms 19 May 2022 267th andrewjc2000 601 216 28ms 15 May 2025 269th weliveinhell 🇭🇹 600 203 8ms 19 Jul 2024 269th helbling 🇨🇭 600 203 9ms 6 Sep 2024 271st neel11235813 595 201 1,219ms 1 Apr 2024 272nd ndren 593 219 25ms 22 Nov 2023 272nd neel11235813 593 219 18ms 1 Apr 2024 274th DialFrost 🇸🇬 591 201 4ms 18 Jan 2024 275th voytxt 🇨🇿 591 206 9ms 15 Aug 2025 276th DialFrost 🇸🇬 588 221 17ms 18 Jan 2024 276th BREMAUCY 🇫🇷 588 221 17ms 22 Aug 2025 278th MeWhenI 🇻🇦 588 272 1,275ms 14 Jun 2023 279th scpchicken 🇵🇼 587 324 149ms 17 Mar 2023 280th KatieLG 🇬🇧 585 222 9ms 7 Jul 2024 281st bac0id 584 185 2ms 25 Jun 2024 282nd dmrichwa 🇺🇸 577 211 9ms 17 Jun 2023 283rd jared-hughes 576 135 40ms 25 May 2022 284th lynn 576 303 152ms 31 Mar 2022 285th guilhem-roy 🇫🇷 572 227 10ms 3 Mar 2022 286th antimon2 🇯🇵 569 195 1,207ms 8 Mar 2024 287th bac0id 569 208 341ms 25 Jun 2024 288th scpchicken 🇵🇼 567 229 16ms 13 Oct 2023 289th janbehrens 🇩🇪 559 218 9ms 4 Dec 2024 290th stu303 558 233 9ms 20 Jul 2022 291st CaedenHarper 🇨🇦 553 218 914ms 2 Oct 2025 292nd davecame 551 236 16ms 19 Mar 2024 293rd m42km 546 238 18ms 12 Nov 2023 294th snoozingnewt 🇺🇸 546 302 121ms 8 days ago 295th DialFrost 🇸🇬 541 221 1ms 29 Jan 2024 296th CaedenHarper 🇨🇦 541 240 10ms 10 Aug 2025 297th KatieLG 🇬🇧 538 222 796ms 27 Oct 2024 298th MichalMarsalek 🇨🇿 538 266 351ms 12 Oct 2023 299th commandblockguy 🇺🇸 537 242 10ms 27 Sep 2023 300th dokutan 535 243 17ms 9 Sep 2025 First Prev 226–300 of 453 Next Last