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 JOrE20 550 222 13ms 23 Feb 2026 322nd blaztoma 🇱🇹 549 281 115ms 28 Nov 2025 323rd snoozingnewt 🇨🇦 549 302 125ms 20 Nov 2025 324th m42km 547 238 19ms 12 Nov 2023 324th firegene 🇮🇪 547 238 17ms 17 days ago 326th DialFrost 🇸🇬 543 221 1ms 29 Jan 2024 327th MichalMarsalek 🇨🇿 543 266 398ms 12 Oct 2023 328th CaedenHarper 🇨🇦 542 240 11ms 10 Aug 2025 329th jusaka 542 288 298ms 13 hours ago 330th KatieLG 🇬🇧 539 222 680ms 27 Oct 2024 331st jusaka 539 273 119ms 13 hours ago 332nd commandz0 🇺🇸 538 242 10ms 27 Sep 2023 333rd dokutan 535 243 16ms 9 Sep 2025 334th bac0id 535 275 125ms 25 Jun 2024 335th olleicua 🇺🇸 533 179 36ms 20 Feb 2025 336th alemelis 531 245 18ms 27 Aug 2024 336th AstroOrbis 531 245 20ms 22 Feb 2026 338th m42km 530 226 651ms 4 Feb 2024 339th albanian-laundromat 🇺🇸 529 229 1,053ms 16 Nov 2025 340th retrohun 529 259 61ms 23 Nov 2022 341st FlorianCassayre 🇫🇷 527 247 10ms 21 Oct 2023 341st janbehrens 🇩🇪 527 247 11ms 4 Dec 2024 343rd Natanaelel 🇸🇪 527 363 144ms 16 Jun 2025 344th CaedenHarper 🇨🇦 525 228 671ms 19 Jan 2025 344th commandz0 🇺🇸 525 228 633ms 1 Sep 2025 346th Natanaelel 🇸🇪 522 183 35ms 18 Feb 2024 347th Babafaba 522 249 17ms 29 Oct 2025 348th bac0id 521 257 416ms 25 Jun 2024 349th rucin93 🇵🇱 520 250 18ms 21 Jan 2024 350th aksyristos 518 251 20ms 21 days ago 351st coreynash 517 236 10ms 13 Feb 2024 351st CaedenHarper 🇨🇦 517 236 16ms 29 Aug 2025 353rd dokutan 516 232 632ms 9 Sep 2025 354th snoozingnewt 🇨🇦 516 277 94ms 10 Feb 2026 355th rucin93 🇵🇱 512 234 577ms 21 Jan 2024 356th jerrandolph 511 306 368ms 25 Sep 2025 357th cros107 🇦🇺 510 255 11ms 28 Jan 2024 357th RaBa21 🇭🇺 510 255 20ms 31 Jul 2025 359th andersk 🇺🇸 507 346 223ms 1 Nov 2022 360th CedricGebistorf 506 257 18ms 3 Mar 2022 361st uttumuttu 🇫🇮 505 242 11ms 9 Apr 2022 362nd scpchicken 🇵🇼 503 224 181ms 25 Feb 2023 363rd Waffle3z 503 249 2ms 18 Sep 2021 364th janbehrens 🇩🇪 502 238 5ms 4 Dec 2024 365th jusaka 500 255 158ms 13 hours ago 366th te-chnical 500 260 24ms 18 Nov 2025 367th jusaka 500 479 31ms 13 hours ago 368th Babafaba 499 240 774ms 29 Oct 2025 369th jusaka 498 240 5ms 13 hours ago 370th emgordon154 498 245 10ms 4 Aug 2024 371st MarcMush 🇫🇷 498 261 17ms 14 Jan 2024 372nd RYNO8 497 262 16ms 4 Sep 2023 373rd albanian-laundromat 🇺🇸 497 319 3ms 16 Jul 2025 374th CatsAreFluffy 495 263 18ms 17 Feb 2024 375th wh3n3v3r 🇨🇿 493 264 21ms 14 Nov 2024 376th SB-945 491 265 10ms 14 Mar 2024 377th Waffle3z 490 249 10ms 18 Sep 2021 378th jusaka 489 256 2ms 13 hours ago 379th robin-scragg 489 266 18ms 27 Aug 2025 380th olleicua 🇺🇸 488 250 11ms 21 Feb 2024 381st ridingqwerty 🇺🇸 487 267 17ms 14 Feb 2024 382nd DialFrost 🇸🇬 486 367 4ms 27 Sep 2024 383rd albanian-laundromat 🇺🇸 485 268 18ms 28 Jun 2025 383rd FortuiteMan 🇫🇷 485 268 17ms 7 Jul 2025 385th jusaka 484 197 37ms 13 hours ago 386th p-vf 🇨🇭 483 246 417ms 21 Nov 2021 387th jusaka 483 336 40ms 13 hours ago 388th alemelis 481 249 695ms 23 Aug 2024 389th KatieLG 🇬🇧 481 254 10ms 26 Oct 2022 390th janbehrens 🇩🇪 479 286 18ms 13 Sep 2022 391st madex 🇩🇪 477 273 22ms 26 days ago 392nd scpchicken 🇵🇼 476 206 3ms 24 Feb 2023 393rd MeWhenI 🇻🇦 475 268 432ms 4 Mar 2022 394th jusaka 473 229 2ms 13 hours ago 395th CaedenHarper 🇨🇦 473 330 360ms 17 Nov 2025 396th Waffle3z 472 202 37ms 23 Sep 2021 397th jusaka 468 270 1,555ms 13 hours ago 398th janbehrens 🇩🇪 467 254 409ms 4 Dec 2024 399th jusaka 467 459 74ms 13 hours ago 400th JOrE20 466 279 10ms 2 Dec 2025 First Prev 321–400 of 532 Next Last