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 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 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 Multitap Input 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 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 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 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 Multitap Input 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 301st m42km 546 238 18ms 12 Nov 2023 302nd snoozingnewt 🇨🇦 546 302 115ms 26 days ago 303rd CaedenHarper 🇨🇦 542 240 11ms 10 Aug 2025 304th DialFrost 🇸🇬 541 221 1ms 29 Jan 2024 305th KatieLG 🇬🇧 539 222 624ms 27 Oct 2024 306th MichalMarsalek 🇨🇿 538 266 483ms 12 Oct 2023 307th commandblockguy 🇺🇸 537 242 10ms 27 Sep 2023 308th dokutan 535 243 16ms 9 Sep 2025 309th olleicua 🇺🇸 532 179 45ms 20 Feb 2025 310th bac0id 532 275 111ms 25 Jun 2024 311th alemelis 531 245 16ms 27 Aug 2024 312th m42km 529 226 1,124ms 4 Feb 2024 313th albanian-laundromat 527 229 721ms 16 Nov 2025 314th retrohun 527 259 69ms 23 Nov 2022 315th FlorianCassayre 🇫🇷 526 247 10ms 21 Oct 2023 315th janbehrens 🇩🇪 526 247 10ms 4 Dec 2024 317th CaedenHarper 🇨🇦 525 228 670ms 19 Jan 2025 317th commandblockguy 🇺🇸 525 228 827ms 1 Sep 2025 319th Natanaelel 🇸🇪 524 363 144ms 16 Jun 2025 320th Babafaba 522 249 17ms 29 Oct 2025 321st Natanaelel 🇸🇪 521 183 52ms 18 Feb 2024 322nd rucin93 🇵🇱 520 250 16ms 21 Jan 2024 323rd bac0id 520 257 435ms 25 Jun 2024 324th coreynash 516 236 9ms 13 Feb 2024 324th CaedenHarper 🇨🇦 516 236 11ms 29 Aug 2025 326th dokutan 515 232 955ms 9 Sep 2025 327th rucin93 🇵🇱 511 234 1,030ms 21 Jan 2024 328th cros107 🇦🇺 510 255 10ms 28 Jan 2024 328th RaBa21 🇭🇺 510 255 16ms 31 Jul 2025 330th jerrandolph 508 306 279ms 25 Sep 2025 331st CedricGebistorf 506 257 16ms 3 Mar 2022 332nd andersk 🇺🇸 504 346 227ms 1 Nov 2022 333rd uttumuttu 🇫🇮 503 242 9ms 9 Apr 2022 334th scpchicken 🇵🇼 501 224 170ms 25 Feb 2023 335th Waffle3z 500 249 2ms 18 Sep 2021 336th te-chnical 500 260 22ms 18 Nov 2025 337th snoozingnewt 🇨🇦 500 284 100ms 14 Oct 2023 338th janbehrens 🇩🇪 499 238 5ms 4 Dec 2024 339th Babafaba 498 240 723ms 29 Oct 2025 340th MarcMush 🇫🇷 498 261 16ms 14 Jan 2024 341st emgordon154 497 245 9ms 4 Aug 2024 342nd RYNO8 496 262 17ms 4 Sep 2023 343rd CatsAreFluffy 494 263 17ms 17 Feb 2024 344th albanian-laundromat 494 319 3ms 16 Jul 2025 345th wh3n3v3r 🇨🇿 492 264 16ms 14 Nov 2024 346th SB-945 490 265 10ms 14 Mar 2024 347th Waffle3z 489 249 8ms 18 Sep 2021 348th robin-scragg 489 266 17ms 27 Aug 2025 349th olleicua 🇺🇸 487 250 9ms 21 Feb 2024 350th ridingqwerty 🇺🇸 487 267 16ms 14 Feb 2024 351st albanian-laundromat 485 268 18ms 28 Jun 2025 351st FortuiteMan 🇫🇷 485 268 16ms 7 Jul 2025 353rd p-vf 🇨🇭 482 246 317ms 21 Nov 2021 354th DialFrost 🇸🇬 481 367 4ms 27 Sep 2024 355th alemelis 480 249 795ms 23 Aug 2024 356th KatieLG 🇬🇧 480 254 9ms 26 Oct 2022 357th janbehrens 🇩🇪 477 286 21ms 13 Sep 2022 358th scpchicken 🇵🇼 475 206 2ms 24 Feb 2023 359th MeWhenI 🇻🇦 473 268 483ms 4 Mar 2022 360th Waffle3z 472 202 51ms 23 Sep 2021 361st CaedenHarper 🇨🇦 471 330 268ms 17 Nov 2025 362nd janbehrens 🇩🇪 467 254 364ms 4 Dec 2024 363rd JOrE20 🇺🇸 466 279 10ms 15 days ago 364th janbehrens 🇩🇪 462 240 762ms 4 Dec 2024 365th adamnielson42 🇺🇸 454 286 14ms 29 Nov 2023 366th elgan65536 451 387 158ms 10 Apr 2024 367th emgordon154 447 265 145ms 5 Jan 2025 368th CaedenHarper 🇨🇦 447 299 552ms 7 Oct 2025 369th janbehrens 🇩🇪 444 301 464ms 4 Dec 2024 370th CaedenHarper 🇨🇦 441 269 372ms 17 Oct 2025 371st MeWhenI 🇻🇦 441 480 80ms 18 Mar 2024 372nd knutae 🇳🇴 439 296 9ms 29 Oct 2021 373rd qpwoeirut 438 297 18ms 22 days ago 374th Natanaelel 🇸🇪 438 737 20ms 19 Feb 2024 375th BambooleanLogic 🇸🇪 434 281 9ms 13 Jul 2023 First Prev 301–375 of 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