⚙ AWK Command Builder & Tester

Build AWK one-liners visually and test them against sample input right in your browser.

Presets

Options

Field Separator (-F)

Output Field Separator (OFS)

Record Separator (RS)

Output Record Separator (ORS)

AWK Rules

Each rule has an optional pattern (condition) and an action (code block). Leave the pattern empty to match all lines.

awk '{print}'

Test Input & Output

Sample Input

Quick Reference

$0Entire line

$1, $2, ...Fields by position

NRCurrent line number

NFNumber of fields

FSField separator

OFSOutput field separator

RSRecord separator

length($0)String length

substr(s,i,n)Substring

split(s,a,fs)Split string into array

gsub(r,s)Global substitution

match(s,r)Regex match

tolower(s)Lowercase

toupper(s)Uppercase

printf fmt, ...Formatted output

/regex/Pattern match