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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 321st m42km 529 226 651ms 4 Feb 2024 322nd albanian-laundromat 527 229 906ms 16 Nov 2025 323rd retrohun 527 259 61ms 23 Nov 2022 324th FlorianCassayre 🇫🇷 526 247 11ms 21 Oct 2023 324th janbehrens 🇩🇪 526 247 10ms 4 Dec 2024 326th CaedenHarper 🇨🇦 525 228 675ms 19 Jan 2025 326th commandz0 🇺🇸 525 228 552ms 1 Sep 2025 328th Natanaelel 🇸🇪 524 363 144ms 16 Jun 2025 329th Babafaba 522 249 16ms 29 Oct 2025 330th Natanaelel 🇸🇪 521 183 33ms 18 Feb 2024 331st rucin93 🇵🇱 520 250 16ms 21 Jan 2024 332nd bac0id 520 257 416ms 25 Jun 2024 333rd coreynash 517 236 9ms 13 Feb 2024 333rd CaedenHarper 🇨🇦 517 236 13ms 29 Aug 2025 335th dokutan 515 232 706ms 9 Sep 2025 336th snoozingnewt 🇨🇦 512 277 92ms 19 days ago 337th rucin93 🇵🇱 511 234 603ms 21 Jan 2024 338th cros107 🇦🇺 510 255 10ms 28 Jan 2024 338th RaBa21 🇭🇺 510 255 16ms 31 Jul 2025 340th jerrandolph 509 306 293ms 25 Sep 2025 341st CedricGebistorf 506 257 16ms 3 Mar 2022 342nd uttumuttu 🇫🇮 504 242 9ms 9 Apr 2022 343rd andersk 🇺🇸 504 346 216ms 1 Nov 2022 344th scpchicken 🇵🇼 501 224 154ms 25 Feb 2023 345th Waffle3z 500 249 2ms 18 Sep 2021 346th te-chnical 500 260 23ms 18 Nov 2025 347th janbehrens 🇩🇪 499 238 5ms 4 Dec 2024 348th Babafaba 498 240 667ms 29 Oct 2025 349th emgordon154 498 245 9ms 4 Aug 2024 350th MarcMush 🇫🇷 498 261 16ms 14 Jan 2024 351st RYNO8 496 262 17ms 4 Sep 2023 352nd CatsAreFluffy 494 263 17ms 17 Feb 2024 353rd albanian-laundromat 494 319 3ms 16 Jul 2025 354th wh3n3v3r 🇨🇿 493 264 17ms 14 Nov 2024 355th SB-945 491 265 9ms 14 Mar 2024 356th Waffle3z 490 249 9ms 18 Sep 2021 357th robin-scragg 489 266 17ms 27 Aug 2025 358th olleicua 🇺🇸 488 250 11ms 21 Feb 2024 359th ridingqwerty 🇺🇸 487 267 16ms 14 Feb 2024 360th albanian-laundromat 485 268 17ms 28 Jun 2025 360th FortuiteMan 🇫🇷 485 268 16ms 7 Jul 2025 362nd p-vf 🇨🇭 482 246 366ms 21 Nov 2021 363rd DialFrost 🇸🇬 481 367 4ms 27 Sep 2024 364th alemelis 480 249 672ms 23 Aug 2024 365th KatieLG 🇬🇧 480 254 9ms 26 Oct 2022 366th janbehrens 🇩🇪 477 286 18ms 13 Sep 2022 367th scpchicken 🇵🇼 475 206 2ms 24 Feb 2023 368th MeWhenI 🇻🇦 473 268 432ms 4 Mar 2022 369th Waffle3z 472 202 35ms 23 Sep 2021 370th CaedenHarper 🇨🇦 472 330 296ms 17 Nov 2025 371st janbehrens 🇩🇪 467 254 411ms 4 Dec 2024 372nd JOrE20 466 279 10ms 2 Dec 2025 373rd janbehrens 🇩🇪 462 240 633ms 4 Dec 2024 374th nemoyatpeace 461 282 17ms 12 Jan 2026 375th adamnielson42 🇺🇸 455 286 15ms 29 Nov 2023 376th elgan65536 🇺🇸 453 385 156ms 21 days ago 377th emgordon154 448 265 159ms 5 Jan 2025 378th CaedenHarper 🇨🇦 447 299 397ms 7 Oct 2025 379th janbehrens 🇩🇪 444 301 463ms 4 Dec 2024 380th CaedenHarper 🇨🇦 441 269 406ms 17 Oct 2025 381st MeWhenI 🇻🇦 441 480 79ms 18 Mar 2024 382nd knutae 🇳🇴 439 296 9ms 29 Oct 2021 383rd qpwoeirut 438 297 17ms 24 Nov 2025 384th Natanaelel 🇸🇪 438 737 20ms 19 Feb 2024 385th BambooleanLogic 🇸🇪 434 281 9ms 13 Jul 2023 386th IISResetMe 422 272 300ms 14 Jun 2024 387th msbranicky 419 310 16ms 12 Aug 2023 388th pschmid0 🇺🇸 414 287 4ms 23 Oct 2022 389th janbehrens 🇩🇪 411 307 2,793ms 20 Nov 2022 390th raspofabs 408 319 19ms 12 Nov 2023 391st TheZwierzLF 🇵🇱 406 320 11ms 6 Jan 2026 392nd janbehrens 🇩🇪 404 314 457ms 13 Sep 2022 393rd yzhs 🇩🇪 393 331 10ms 4 Jun 2022 394th LeeCamp 387 336 17ms 9 Dec 2021 395th msbranicky 385 311 746ms 16 Jan 2024 396th yuchuehw 385 338 16ms 5 Jan 2024 397th annaproxy 384 309 411ms 20 Mar 2022 398th mbittner20 384 339 9ms 3 Jul 2023 399th TheZwierzLF 🇵🇱 383 312 867ms 6 Jan 2026 400th CatsAreFluffy 380 201 51ms 27 Jan 2023 First Prev 321–400 of 472 Next Last