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 CaedenHarper 🇨🇦 542 240 11ms 10 Aug 2025 322nd DialFrost 🇸🇬 541 221 1ms 29 Jan 2024 323rd MichalMarsalek 🇨🇿 541 266 398ms 12 Oct 2023 324th KatieLG 🇬🇧 539 222 680ms 27 Oct 2024 325th commandz0 🇺🇸 538 242 10ms 27 Sep 2023 326th dokutan 535 243 16ms 9 Sep 2025 327th olleicua 🇺🇸 533 179 36ms 20 Feb 2025 328th bac0id 532 275 125ms 25 Jun 2024 329th alemelis 531 245 18ms 27 Aug 2024 329th AstroOrbis 531 245 20ms 22 Feb 2026 331st m42km 530 226 651ms 4 Feb 2024 332nd albanian-laundromat 🇺🇸 527 229 1,053ms 16 Nov 2025 333rd FlorianCassayre 🇫🇷 527 247 10ms 21 Oct 2023 333rd janbehrens 🇩🇪 527 247 11ms 4 Dec 2024 335th retrohun 527 259 61ms 23 Nov 2022 336th CaedenHarper 🇨🇦 525 228 671ms 19 Jan 2025 336th commandz0 🇺🇸 525 228 633ms 1 Sep 2025 338th Natanaelel 🇸🇪 524 363 144ms 16 Jun 2025 339th Babafaba 522 249 17ms 29 Oct 2025 340th Natanaelel 🇸🇪 521 183 35ms 18 Feb 2024 341st rucin93 🇵🇱 520 250 18ms 21 Jan 2024 342nd bac0id 520 257 416ms 25 Jun 2024 343rd aksyristos 518 251 20ms 17 days ago 344th coreynash 517 236 10ms 13 Feb 2024 344th CaedenHarper 🇨🇦 517 236 12ms 29 Aug 2025 346th dokutan 516 232 632ms 9 Sep 2025 347th snoozingnewt 🇨🇦 512 277 94ms 10 Feb 2026 348th rucin93 🇵🇱 511 234 577ms 21 Jan 2024 349th cros107 🇦🇺 510 255 11ms 28 Jan 2024 349th RaBa21 🇭🇺 510 255 20ms 31 Jul 2025 351st jerrandolph 509 306 368ms 25 Sep 2025 352nd andersk 🇺🇸 507 346 223ms 1 Nov 2022 353rd CedricGebistorf 506 257 18ms 3 Mar 2022 354th uttumuttu 🇫🇮 504 242 12ms 9 Apr 2022 355th scpchicken 🇵🇼 501 224 181ms 25 Feb 2023 356th janbehrens 🇩🇪 501 238 7ms 4 Dec 2024 357th Waffle3z 500 249 2ms 18 Sep 2021 358th te-chnical 500 260 24ms 18 Nov 2025 359th Babafaba 499 240 774ms 29 Oct 2025 360th emgordon154 498 245 10ms 4 Aug 2024 361st MarcMush 🇫🇷 498 261 17ms 14 Jan 2024 362nd RYNO8 497 262 16ms 4 Sep 2023 363rd CatsAreFluffy 495 263 18ms 17 Feb 2024 364th albanian-laundromat 🇺🇸 494 319 3ms 16 Jul 2025 365th wh3n3v3r 🇨🇿 493 264 21ms 14 Nov 2024 366th SB-945 491 265 10ms 14 Mar 2024 367th Waffle3z 490 249 10ms 18 Sep 2021 368th robin-scragg 489 266 18ms 27 Aug 2025 369th olleicua 🇺🇸 488 250 13ms 21 Feb 2024 370th ridingqwerty 🇺🇸 487 267 17ms 14 Feb 2024 371st albanian-laundromat 🇺🇸 485 268 18ms 28 Jun 2025 371st FortuiteMan 🇫🇷 485 268 17ms 7 Jul 2025 373rd p-vf 🇨🇭 482 246 382ms 21 Nov 2021 374th alemelis 481 249 695ms 23 Aug 2024 375th DialFrost 🇸🇬 481 367 4ms 27 Sep 2024 376th KatieLG 🇬🇧 480 254 12ms 26 Oct 2022 377th madex 🇩🇪 477 273 22ms 22 days ago 378th janbehrens 🇩🇪 477 286 18ms 13 Sep 2022 379th scpchicken 🇵🇼 475 206 3ms 24 Feb 2023 380th MeWhenI 🇻🇦 473 268 432ms 4 Mar 2022 381st Waffle3z 472 202 37ms 23 Sep 2021 382nd CaedenHarper 🇨🇦 472 330 360ms 17 Nov 2025 383rd janbehrens 🇩🇪 467 254 386ms 4 Dec 2024 384th JOrE20 466 279 10ms 2 Dec 2025 385th madex 🇩🇪 464 233 2ms 22 days ago 386th janbehrens 🇩🇪 462 240 648ms 4 Dec 2024 387th nemoyatpeace 461 282 17ms 12 Jan 2026 388th elgan65536 🇺🇸 456 385 157ms 7 Feb 2026 389th adamnielson42 🇺🇸 455 286 15ms 29 Nov 2023 390th emgordon154 448 265 166ms 5 Jan 2025 391st CaedenHarper 🇨🇦 447 299 397ms 7 Oct 2025 392nd Chinay-Domitrix 🇺🇸 446 271 2,796ms 14 Mar 2026 393rd janbehrens 🇩🇪 444 301 463ms 4 Dec 2024 394th CaedenHarper 🇨🇦 441 269 401ms 17 Oct 2025 395th MeWhenI 🇻🇦 441 480 91ms 18 Mar 2024 396th knutae 🇳🇴 440 296 10ms 29 Oct 2021 397th qpwoeirut 438 297 18ms 24 Nov 2025 398th Natanaelel 🇸🇪 438 737 20ms 19 Feb 2024 399th BambooleanLogic 🇸🇪 434 281 13ms 13 Jul 2023 400th IISResetMe 422 272 251ms 14 Jun 2024 First Prev 321–400 of 487 Next Last