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 KatieLG 🇬🇧 539 222 680ms 27 Oct 2024 322nd commandz0 🇺🇸 538 242 10ms 27 Sep 2023 323rd dokutan 535 243 16ms 9 Sep 2025 324th olleicua 🇺🇸 533 179 36ms 20 Feb 2025 325th bac0id 532 275 125ms 25 Jun 2024 326th alemelis 531 245 18ms 27 Aug 2024 326th AstroOrbis 531 245 20ms 22 Feb 2026 328th m42km 530 226 651ms 4 Feb 2024 329th albanian-laundromat 🇺🇸 527 229 1,053ms 16 Nov 2025 330th FlorianCassayre 🇫🇷 527 247 10ms 21 Oct 2023 330th janbehrens 🇩🇪 527 247 11ms 4 Dec 2024 332nd retrohun 527 259 61ms 23 Nov 2022 333rd CaedenHarper 🇨🇦 525 228 671ms 19 Jan 2025 333rd commandz0 🇺🇸 525 228 633ms 1 Sep 2025 335th Natanaelel 🇸🇪 524 363 144ms 16 Jun 2025 336th Babafaba 522 249 17ms 29 Oct 2025 337th Natanaelel 🇸🇪 521 183 35ms 18 Feb 2024 338th rucin93 🇵🇱 520 250 18ms 21 Jan 2024 339th bac0id 520 257 416ms 25 Jun 2024 340th aksyristos 518 251 20ms 20 days ago 341st coreynash 517 236 10ms 13 Feb 2024 341st CaedenHarper 🇨🇦 517 236 12ms 29 Aug 2025 343rd dokutan 516 232 632ms 9 Sep 2025 344th snoozingnewt 🇨🇦 512 277 94ms 10 Feb 2026 345th rucin93 🇵🇱 511 234 577ms 21 Jan 2024 346th cros107 🇦🇺 510 255 11ms 28 Jan 2024 346th RaBa21 🇭🇺 510 255 20ms 31 Jul 2025 348th jerrandolph 509 306 368ms 25 Sep 2025 349th andersk 🇺🇸 507 346 223ms 1 Nov 2022 350th CedricGebistorf 506 257 18ms 3 Mar 2022 351st uttumuttu 🇫🇮 504 242 12ms 9 Apr 2022 352nd scpchicken 🇵🇼 501 224 181ms 25 Feb 2023 353rd janbehrens 🇩🇪 501 238 7ms 4 Dec 2024 354th Waffle3z 500 249 2ms 18 Sep 2021 355th te-chnical 500 260 24ms 18 Nov 2025 356th Babafaba 499 240 774ms 29 Oct 2025 357th emgordon154 498 245 10ms 4 Aug 2024 358th MarcMush 🇫🇷 498 261 17ms 14 Jan 2024 359th RYNO8 497 262 16ms 4 Sep 2023 360th CatsAreFluffy 495 263 18ms 17 Feb 2024 361st albanian-laundromat 🇺🇸 494 319 3ms 16 Jul 2025 362nd wh3n3v3r 🇨🇿 493 264 21ms 14 Nov 2024 363rd SB-945 491 265 10ms 14 Mar 2024 364th Waffle3z 490 249 10ms 18 Sep 2021 365th robin-scragg 489 266 18ms 27 Aug 2025 366th olleicua 🇺🇸 488 250 13ms 21 Feb 2024 367th ridingqwerty 🇺🇸 487 267 17ms 14 Feb 2024 368th albanian-laundromat 🇺🇸 485 268 18ms 28 Jun 2025 368th FortuiteMan 🇫🇷 485 268 17ms 7 Jul 2025 370th p-vf 🇨🇭 482 246 382ms 21 Nov 2021 371st alemelis 481 249 695ms 23 Aug 2024 372nd DialFrost 🇸🇬 481 367 4ms 27 Sep 2024 373rd KatieLG 🇬🇧 480 254 12ms 26 Oct 2022 374th madex 🇩🇪 477 273 22ms 25 days ago 375th janbehrens 🇩🇪 477 286 18ms 13 Sep 2022 376th scpchicken 🇵🇼 475 206 3ms 24 Feb 2023 377th MeWhenI 🇻🇦 473 268 432ms 4 Mar 2022 378th Waffle3z 472 202 37ms 23 Sep 2021 379th CaedenHarper 🇨🇦 472 330 360ms 17 Nov 2025 380th janbehrens 🇩🇪 467 254 386ms 4 Dec 2024 381st JOrE20 466 279 10ms 2 Dec 2025 382nd madex 🇩🇪 464 233 2ms 25 days ago 383rd janbehrens 🇩🇪 462 240 648ms 4 Dec 2024 384th nemoyatpeace 461 282 17ms 12 Jan 2026 385th elgan65536 🇺🇸 456 385 157ms 7 Feb 2026 386th adamnielson42 🇺🇸 455 286 15ms 29 Nov 2023 387th emgordon154 448 265 166ms 5 Jan 2025 388th CaedenHarper 🇨🇦 447 299 397ms 7 Oct 2025 389th Chinay-Domitrix 🇺🇸 446 271 2,796ms 14 Mar 2026 390th janbehrens 🇩🇪 444 301 463ms 4 Dec 2024 391st CaedenHarper 🇨🇦 441 269 401ms 17 Oct 2025 392nd MeWhenI 🇻🇦 441 480 91ms 18 Mar 2024 393rd knutae 🇳🇴 440 296 10ms 29 Oct 2021 394th qpwoeirut 438 297 18ms 24 Nov 2025 395th Natanaelel 🇸🇪 438 737 20ms 19 Feb 2024 396th BambooleanLogic 🇸🇪 434 281 13ms 13 Jul 2023 397th IISResetMe 422 272 251ms 14 Jun 2024 398th msbranicky 420 310 18ms 12 Aug 2023 399th madex 🇩🇪 418 292 10ms 25 days ago 400th pschmid0 🇺🇸 415 287 5ms 23 Oct 2022 First Prev 321–400 of 483 Next Last