A spintax generator takes the versions of a line you want to rotate and writes them as one string your sending tool can read. Writing the versions is the easy part. The syntax is where it breaks: one tool reads {Hi|Hello}, another wants {{Hi|Hello}}, a third needs a keyword, and text that works in one reaches a prospect as raw braces in another.
The generator above runs in your browser. Nothing you type is sent or saved.
How to use it
Type each version on its own line and pick the format your sending tool's help page shows, then copy the result. For an email or a sequence you already wrote, paste it, pick the format it is in and the one you want, and you get the converted text. Merge tags can be renamed to the target's style as well.
Then draw a few random versions and read them aloud. An opener with three versions and a closing line with three more make nine emails, and nobody read most of them.
What the checker flags
Some findings break the email: an opening brace with no closing brace sends the braces as text. The rest are worth a look. The one people miss is the empty version. {Hi|} looks like a stray pipe, and part of your list gets an email with a word missing.
Nesting is mostly undocumented. Spintax libraries read nested braces, and Wikipedia's entry on article spinning describes many levels of them, but most sending tools say nothing and one says it will not process them. Keep rotations one level deep.
What to do next
Spintax only earns its keep on a list worth writing to, so start with finding the right people to write to.
To send from Oneprofile, convert to the {{spin: a | b}} format and paste it into a sequence's email step. Rotations arrive as rotations, and a merge tag that matches a column becomes a variable. Each contact locks onto one version, so the preview matches the send. The variables and spintax guide covers the editor.