Search for one of these and you mostly get a monthly spreadsheet with two income columns. That is not a biweekly budget: it still assumes a month is the container, which is the assumption that makes fortnightly pay hard.
Twenty six blocks, one per paycheck in a year of fortnightly pay. Not twelve months with two columns each.
Two blocks a year will look almost empty on the bills side, because your monthly bills are covered by the other two paychecks that month. A monthly template hides that third paycheck inside a row, which is how the extra money quietly disappears.
The PDF explains those two blocks on the sheet itself rather than only here, because a file that gets printed and shared travels away from the page it came from.
Everything else is the same block: start, income, bills by date, what is left, and where it goes.
A Google Sheets version, which dates the blocks for you and marks the two three paycheck months, is coming.
Cashrou runs this arithmetic on every payday and keeps it up to date without retyping. The template stays free whether or not you ever install it.