Flip text upside down
Turn the letters over and reverse both the characters and the lines.
Flipping text is three things, not one. Each character is swapped for a rotated look-alike, the characters within a line are reversed, and — for anything longer than a single line — the lines are reversed too, because the last line ends up at the top when you turn the page over.
Most flip tools skip the third step and produce a block that is upside down but in the wrong order. This recipe pins all three on, so a multi-line message reads correctly when the phone is turned around. It runs locally in your browser.
Questions
Why reverse the lines as well?
Rotate a page by 180° and the bottom line is now the top one. Without reversing the line order a multi-line message comes out scrambled.
What happens to characters with no flipped form?
They are left as they are. Accents are folded to their base letters first, because the rotated block covers plain Latin only.
Is it real text or an image?
Real text — every character is a normal Unicode code point, so it pastes into a message, a bio or a comment like anything else.
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