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 dokutan 535 243 17ms 9 Sep 2025 322nd olleicua 🇺🇸 533 179 36ms 20 Feb 2025 323rd bac0id 532 275 121ms 25 Jun 2024 324th alemelis 531 245 16ms 27 Aug 2024 324th AstroOrbis 531 245 18ms 22 Feb 2026 326th m42km 529 226 651ms 4 Feb 2024 327th albanian-laundromat 527 229 1,509ms 16 Nov 2025 328th FlorianCassayre 🇫🇷 527 247 11ms 21 Oct 2023 328th janbehrens 🇩🇪 527 247 10ms 4 Dec 2024 330th retrohun 527 259 61ms 23 Nov 2022 331st CaedenHarper 🇨🇦 525 228 675ms 19 Jan 2025 331st commandz0 🇺🇸 525 228 552ms 1 Sep 2025 333rd Natanaelel 🇸🇪 524 363 144ms 16 Jun 2025 334th Babafaba 522 249 16ms 29 Oct 2025 335th Natanaelel 🇸🇪 521 183 35ms 18 Feb 2024 336th rucin93 🇵🇱 520 250 16ms 21 Jan 2024 337th bac0id 520 257 416ms 25 Jun 2024 338th aksyristos 518 251 17ms 10 days ago 339th coreynash 517 236 9ms 13 Feb 2024 339th CaedenHarper 🇨🇦 517 236 11ms 29 Aug 2025 341st dokutan 515 232 706ms 9 Sep 2025 342nd snoozingnewt 🇨🇦 512 277 97ms 10 Feb 2026 343rd rucin93 🇵🇱 511 234 603ms 21 Jan 2024 344th cros107 🇦🇺 510 255 10ms 28 Jan 2024 344th RaBa21 🇭🇺 510 255 16ms 31 Jul 2025 346th jerrandolph 509 306 290ms 25 Sep 2025 347th andersk 🇺🇸 507 346 223ms 1 Nov 2022 348th CedricGebistorf 506 257 16ms 3 Mar 2022 349th uttumuttu 🇫🇮 504 242 9ms 9 Apr 2022 350th scpchicken 🇵🇼 501 224 185ms 25 Feb 2023 351st Waffle3z 500 249 2ms 18 Sep 2021 352nd te-chnical 500 260 23ms 18 Nov 2025 353rd janbehrens 🇩🇪 499 238 5ms 4 Dec 2024 354th Babafaba 498 240 667ms 29 Oct 2025 355th emgordon154 498 245 9ms 4 Aug 2024 356th MarcMush 🇫🇷 498 261 16ms 14 Jan 2024 357th RYNO8 496 262 17ms 4 Sep 2023 358th CatsAreFluffy 495 263 17ms 17 Feb 2024 359th albanian-laundromat 494 319 3ms 16 Jul 2025 360th wh3n3v3r 🇨🇿 493 264 17ms 14 Nov 2024 361st SB-945 491 265 9ms 14 Mar 2024 362nd Waffle3z 490 249 9ms 18 Sep 2021 363rd robin-scragg 489 266 17ms 27 Aug 2025 364th olleicua 🇺🇸 488 250 10ms 21 Feb 2024 365th ridingqwerty 🇺🇸 487 267 16ms 14 Feb 2024 366th vang1ong7ang 486 361 154ms 42 hours ago 367th albanian-laundromat 485 268 17ms 28 Jun 2025 367th FortuiteMan 🇫🇷 485 268 16ms 7 Jul 2025 369th p-vf 🇨🇭 482 246 385ms 21 Nov 2021 370th DialFrost 🇸🇬 481 367 4ms 27 Sep 2024 371st alemelis 480 249 672ms 23 Aug 2024 372nd KatieLG 🇬🇧 480 254 9ms 26 Oct 2022 373rd janbehrens 🇩🇪 477 286 18ms 13 Sep 2022 374th madex 🇩🇪 476 273 16ms 15 days ago 375th scpchicken 🇵🇼 475 206 4ms 24 Feb 2023 376th MeWhenI 🇻🇦 473 268 432ms 4 Mar 2022 377th Waffle3z 472 202 37ms 23 Sep 2021 378th CaedenHarper 🇨🇦 472 330 289ms 17 Nov 2025 379th janbehrens 🇩🇪 467 254 386ms 4 Dec 2024 380th JOrE20 466 279 10ms 2 Dec 2025 381st madex 🇩🇪 464 233 2ms 15 days ago 382nd janbehrens 🇩🇪 462 240 633ms 4 Dec 2024 383rd nemoyatpeace 461 282 17ms 12 Jan 2026 384th elgan65536 🇺🇸 456 385 157ms 7 Feb 2026 385th adamnielson42 🇺🇸 455 286 15ms 29 Nov 2023 386th emgordon154 448 265 158ms 5 Jan 2025 387th CaedenHarper 🇨🇦 447 299 397ms 7 Oct 2025 388th Chinay-Domitrix 🇺🇸 446 271 2,849ms 21 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 9ms 29 Oct 2021 393rd qpwoeirut 438 297 17ms 24 Nov 2025 394th Natanaelel 🇸🇪 438 737 20ms 19 Feb 2024 395th BambooleanLogic 🇸🇪 434 281 11ms 13 Jul 2023 396th IISResetMe 422 272 311ms 14 Jun 2024 397th msbranicky 420 310 16ms 12 Aug 2023 398th madex 🇩🇪 418 292 8ms 15 days ago 399th pschmid0 🇺🇸 414 287 4ms 23 Oct 2022 400th janbehrens 🇩🇪 411 307 2,867ms 20 Nov 2022 First Prev 321–400 of 483 Next Last