Hello, World
BEGIN { print "Hello, World!" }main.awk
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main.awk · output appears here
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Output streams here as your program runs.
AWK 1.36.1Readymain.awkLn 1, Col 1Spaces: 4UTF-8
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main.awk · output appears here
Press Run to execute
Output streams here as your program runs.
AWK is a domain-specific language built for scanning and processing text, line by line, splitting each record into fields automatically. CompileBytes runs GNU AWK (gawk) 5.1.0, the most feature-rich AWK implementation, which adds extensions like gensub(), true arrays, networking, and the GNU regular-expression engine on top of the classic one-true-awk behavior described by Aho, Weinberger, and Kernighan.
An AWK program is a series of pattern { action } rules: for every input line a matching pattern fires its action. Built-in variables such as NR (record number), NF (field count), and $1..$NF (fields) make tabular and log data trivial to slice. AWK shines as a glue tool in shell pipelines and for quick one-liners, but it is also a complete language with functions, arrays, and string operations.
main.awk is the entry point for each run.
Use the Input panel to pipe standard input to your program when it needs data.
Run sends your code to a fresh hosted runtime and streams the result into the output panel.
Your draft stays in this browser, and Share creates a separate snapshot link.
BEGIN { print "Hello, World!" }{ print $2 }{ sum += $1 }
END { print "Total:", sum }/error/ { count++ }
END { print count, "errors" }{ print NR, $0 }{ sum += $1; n++ }
END { if (n > 0) print "Average:", sum / n }{ for (i = 1; i <= NF; i++) count[$i]++ }
END { for (w in count) print w, count[w] }function max(a, b) { return a > b ? a : b }
{ print max($1, $2) }{ printf "%-10s %5d\n", $1, $2 }The editor uses Monaco, the engine behind VS Code, with language-aware editing tools and familiar keyboard controls.
Type or paste your code into the editor, then click Run (or press Ctrl/Cmd + Enter) to execute it.
Output streams into the console panel, including runtime errors, exit status, and execution time.
Nothing to install and no account to create — code runs in an isolated hosted runtime.
Language-aware autocomplete and IntelliSense suggestions where the editor has a matching language service
Syntax highlighting, with native compiler and runtime errors shown in the console
Bracket matching, auto-indentation, code folding, and a minimap
Multi-cursor editing plus find & replace (Ctrl/Cmd + F)
Full undo/redo history and copy to clipboard
Built on Monaco — the same editor that powers VS Code
Run on demand, or turn on Auto-run to execute on every change
Stop long-running or infinite programs at any time
A real console shows standard output, errors, exit status, and execution time
Pass standard input (stdin) to your program from the Input panel — one value per line
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Run code: Ctrl/Cmd + Enter
Find & replace: Ctrl/Cmd + F
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AWK is one of 46 single-file compiler scratchpads. Each run submits only main.awk; local sibling-file imports are not enabled.
Linked-project languages (23): Node.js, TypeScript, Deno, Python, C, Go, Dart, Swift, Rust, Ruby, PHP, Java, Kotlin, C++, C#, Nim, Crystal, Haxe, Zig, Scala, D, Bun, Objective-C.
Single-file scratchpads (46): Matplotlib, NumPy, pandas, Haskell, Clojure, Perl, Lua, Tcl, jq, Raku, Elixir, Bash, Zsh, Nushell, R, Assembly (NASM), Julia, Octave, Groovy, PowerShell, Visual Basic .NET, Odin, Pascal, Lisp, Erlang, CoffeeScript, COBOL, BASIC, V, Racket, OCaml, Prolog, AWK, Emacs Lisp, Emojicode, Forth, F#, Fortran, Assembly (NASM64), Solidity, Mojo, Ada, WASM (WAT), Gleam, Shell Script (sh), Scheme.
Download file exports the active AWK source file.