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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator 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 ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator 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 301st commandblockguy 🇺🇸 537 242 10ms 27 Sep 2023 302nd dokutan 535 243 16ms 9 Sep 2025 303rd olleicua 🇺🇸 532 179 41ms 20 Feb 2025 304th bac0id 532 275 109ms 25 Jun 2024 305th alemelis 530 245 19ms 27 Aug 2024 306th m42km 529 226 1,130ms 4 Feb 2024 307th albanian-laundromat 527 229 745ms 19 days ago 308th retrohun 527 259 59ms 23 Nov 2022 309th FlorianCassayre 🇫🇷 526 247 10ms 21 Oct 2023 309th janbehrens 🇩🇪 526 247 9ms 4 Dec 2024 311th CaedenHarper 🇨🇦 524 228 740ms 19 Jan 2025 311th commandblockguy 🇺🇸 524 228 841ms 1 Sep 2025 313th Natanaelel 🇸🇪 524 363 172ms 16 Jun 2025 314th Babafaba 522 249 20ms 29 Oct 2025 315th Natanaelel 🇸🇪 521 183 32ms 18 Feb 2024 316th rucin93 🇵🇱 520 250 17ms 21 Jan 2024 317th bac0id 519 257 303ms 25 Jun 2024 318th coreynash 516 236 9ms 13 Feb 2024 318th CaedenHarper 🇨🇦 516 236 11ms 29 Aug 2025 320th dokutan 515 232 1,036ms 9 Sep 2025 321st rucin93 🇵🇱 511 234 1,400ms 21 Jan 2024 322nd cros107 🇦🇺 510 255 10ms 28 Jan 2024 322nd RaBa21 🇭🇺 510 255 16ms 31 Jul 2025 324th jerrandolph 508 306 265ms 25 Sep 2025 325th CedricGebistorf 506 257 16ms 3 Mar 2022 326th andersk 🇺🇸 504 346 227ms 1 Nov 2022 327th uttumuttu 🇫🇮 503 242 9ms 9 Apr 2022 328th scpchicken 🇵🇼 501 224 140ms 25 Feb 2023 329th Waffle3z 500 249 2ms 18 Sep 2021 330th te-chnical 500 260 24ms 16 days ago 331st snoozingnewt 🇨🇦 500 284 83ms 14 Oct 2023 332nd janbehrens 🇩🇪 499 238 4ms 4 Dec 2024 333rd Babafaba 498 240 795ms 29 Oct 2025 334th MarcMush 🇫🇷 498 261 16ms 14 Jan 2024 335th emgordon154 497 245 9ms 4 Aug 2024 336th RYNO8 496 262 16ms 4 Sep 2023 337th CatsAreFluffy 494 263 16ms 17 Feb 2024 338th albanian-laundromat 494 319 3ms 16 Jul 2025 339th wh3n3v3r 🇨🇿 492 264 16ms 14 Nov 2024 340th SB-945 490 265 9ms 14 Mar 2024 341st Waffle3z 489 249 9ms 18 Sep 2021 342nd robin-scragg 489 266 16ms 27 Aug 2025 343rd olleicua 🇺🇸 487 250 9ms 21 Feb 2024 344th ridingqwerty 🇺🇸 487 267 16ms 14 Feb 2024 345th albanian-laundromat 485 268 17ms 28 Jun 2025 345th FortuiteMan 🇫🇷 485 268 15ms 7 Jul 2025 347th p-vf 🇨🇭 481 246 329ms 21 Nov 2021 348th DialFrost 🇸🇬 481 367 3ms 27 Sep 2024 349th alemelis 480 249 811ms 23 Aug 2024 350th KatieLG 🇬🇧 480 254 9ms 26 Oct 2022 351st snoozingnewt 🇨🇦 478 272 17ms 29 Sep 2025 352nd janbehrens 🇩🇪 477 286 20ms 13 Sep 2022 353rd scpchicken 🇵🇼 474 206 3ms 24 Feb 2023 354th MeWhenI 🇻🇦 473 268 489ms 4 Mar 2022 355th Waffle3z 472 202 39ms 23 Sep 2021 356th CaedenHarper 🇨🇦 471 330 272ms 18 days ago 357th janbehrens 🇩🇪 466 254 344ms 4 Dec 2024 358th JOrE20 🇺🇸 466 279 10ms 3 days ago 359th janbehrens 🇩🇪 462 240 553ms 4 Dec 2024 360th adamnielson42 🇺🇸 454 286 14ms 29 Nov 2023 361st elgan65536 451 387 156ms 10 Apr 2024 362nd emgordon154 447 265 146ms 5 Jan 2025 363rd CaedenHarper 🇨🇦 446 299 350ms 7 Oct 2025 364th janbehrens 🇩🇪 443 301 303ms 4 Dec 2024 365th snoozingnewt 🇨🇦 441 271 713ms 11 Feb 2024 366th MeWhenI 🇻🇦 441 480 80ms 18 Mar 2024 367th CaedenHarper 🇨🇦 440 269 349ms 17 Oct 2025 368th knutae 🇳🇴 439 296 9ms 29 Oct 2021 369th qpwoeirut 438 297 25ms 11 days ago 370th Natanaelel 🇸🇪 438 737 20ms 19 Feb 2024 371st BambooleanLogic 🇸🇪 434 281 9ms 13 Jul 2023 372nd IISResetMe 422 272 226ms 14 Jun 2024 373rd msbranicky 419 310 16ms 12 Aug 2023 374th pschmid0 🇺🇸 414 287 4ms 23 Oct 2022 375th janbehrens 🇩🇪 411 307 2,233ms 20 Nov 2022 First Prev 301–375 of 457 Next 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