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 321st commandz0 🇺🇸 538 242 10ms 27 Sep 2023 322nd dokutan 535 243 16ms 9 Sep 2025 323rd olleicua 🇺🇸 533 179 36ms 20 Feb 2025 324th bac0id 532 275 125ms 25 Jun 2024 325th alemelis 531 245 18ms 27 Aug 2024 325th AstroOrbis 531 245 20ms 22 Feb 2026 327th m42km 529 226 651ms 4 Feb 2024 328th albanian-laundromat 🇺🇸 527 229 1,053ms 16 Nov 2025 329th FlorianCassayre 🇫🇷 527 247 10ms 21 Oct 2023 329th janbehrens 🇩🇪 527 247 11ms 4 Dec 2024 331st retrohun 527 259 61ms 23 Nov 2022 332nd CaedenHarper 🇨🇦 525 228 671ms 19 Jan 2025 332nd commandz0 🇺🇸 525 228 633ms 1 Sep 2025 334th Natanaelel 🇸🇪 524 363 144ms 16 Jun 2025 335th Babafaba 522 249 17ms 29 Oct 2025 336th Natanaelel 🇸🇪 521 183 35ms 18 Feb 2024 337th rucin93 🇵🇱 520 250 18ms 21 Jan 2024 338th bac0id 520 257 416ms 25 Jun 2024 339th aksyristos 518 251 20ms 13 days ago 340th coreynash 517 236 10ms 13 Feb 2024 340th CaedenHarper 🇨🇦 517 236 12ms 29 Aug 2025 342nd dokutan 515 232 632ms 9 Sep 2025 343rd snoozingnewt 🇨🇦 512 277 94ms 10 Feb 2026 344th rucin93 🇵🇱 511 234 577ms 21 Jan 2024 345th cros107 🇦🇺 510 255 11ms 28 Jan 2024 345th RaBa21 🇭🇺 510 255 20ms 31 Jul 2025 347th jerrandolph 509 306 368ms 25 Sep 2025 348th CedricGebistorf 506 257 18ms 3 Mar 2022 349th andersk 🇺🇸 506 346 223ms 1 Nov 2022 350th uttumuttu 🇫🇮 504 242 12ms 9 Apr 2022 351st scpchicken 🇵🇼 501 224 181ms 25 Feb 2023 352nd janbehrens 🇩🇪 501 238 5ms 4 Dec 2024 353rd Waffle3z 500 249 2ms 18 Sep 2021 354th te-chnical 500 260 24ms 18 Nov 2025 355th Babafaba 498 240 774ms 29 Oct 2025 356th emgordon154 498 245 10ms 4 Aug 2024 357th MarcMush 🇫🇷 498 261 17ms 14 Jan 2024 358th RYNO8 496 262 16ms 4 Sep 2023 359th CatsAreFluffy 495 263 18ms 17 Feb 2024 360th albanian-laundromat 🇺🇸 494 319 3ms 16 Jul 2025 361st wh3n3v3r 🇨🇿 493 264 21ms 14 Nov 2024 362nd SB-945 491 265 10ms 14 Mar 2024 363rd Waffle3z 490 249 10ms 18 Sep 2021 364th robin-scragg 489 266 18ms 27 Aug 2025 365th olleicua 🇺🇸 488 250 13ms 21 Feb 2024 366th ridingqwerty 🇺🇸 487 267 17ms 14 Feb 2024 367th albanian-laundromat 🇺🇸 485 268 18ms 28 Jun 2025 367th FortuiteMan 🇫🇷 485 268 17ms 7 Jul 2025 369th p-vf 🇨🇭 482 246 382ms 21 Nov 2021 370th DialFrost 🇸🇬 481 367 4ms 27 Sep 2024 371st alemelis 480 249 695ms 23 Aug 2024 372nd KatieLG 🇬🇧 480 254 12ms 26 Oct 2022 373rd janbehrens 🇩🇪 477 286 18ms 13 Sep 2022 374th madex 🇩🇪 476 273 22ms 18 days ago 375th scpchicken 🇵🇼 475 206 3ms 24 Feb 2023 376th MeWhenI 🇻🇦 473 268 432ms 4 Mar 2022 377th Waffle3z 472 202 37ms 23 Sep 2021 378th CaedenHarper 🇨🇦 472 330 360ms 17 Nov 2025 379th janbehrens 🇩🇪 467 254 386ms 4 Dec 2024 380th JOrE20 466 279 10ms 2 Dec 2025 381st madex 🇩🇪 464 233 2ms 18 days ago 382nd janbehrens 🇩🇪 462 240 598ms 4 Dec 2024 383rd nemoyatpeace 461 282 17ms 12 Jan 2026 384th adamnielson42 🇺🇸 455 286 15ms 29 Nov 2023 385th elgan65536 🇺🇸 455 385 157ms 7 Feb 2026 386th emgordon154 448 265 166ms 5 Jan 2025 387th CaedenHarper 🇨🇦 447 299 397ms 7 Oct 2025 388th Chinay-Domitrix 🇺🇸 446 271 2,796ms 25 days ago 389th janbehrens 🇩🇪 444 301 463ms 4 Dec 2024 390th CaedenHarper 🇨🇦 441 269 401ms 17 Oct 2025 391st MeWhenI 🇻🇦 441 480 91ms 18 Mar 2024 392nd knutae 🇳🇴 439 296 10ms 29 Oct 2021 393rd qpwoeirut 438 297 18ms 24 Nov 2025 394th Natanaelel 🇸🇪 438 737 20ms 19 Feb 2024 395th BambooleanLogic 🇸🇪 434 281 13ms 13 Jul 2023 396th IISResetMe 422 272 251ms 14 Jun 2024 397th msbranicky 420 310 18ms 12 Aug 2023 398th madex 🇩🇪 418 292 10ms 18 days ago 399th pschmid0 🇺🇸 415 287 4ms 23 Oct 2022 400th janbehrens 🇩🇪 411 307 2,980ms 20 Nov 2022 First Prev 321–400 of 484 Next Last