Text Reverser

“Reverse the text” describes four different operations, and choosing the wrong one is why the result looks almost right. Reversing characters turns Ship the build into dliub eht pihS. Reversing word order gives build the Ship, with every word still spelled forwards. Reversing lines leaves each line alone and flips their order top to bottom. Text Reverser puts all four on separate buttons rather than picking for you.

The two word modes split on a capturing group, /(\s+)/, which keeps the whitespace runs inside the array instead of discarding them. Reversing and rejoining therefore preserves your spacing pattern rather than flattening it to single spaces. Note that the spacing travels with the reversal: a line indented by four spaces comes back with those four spaces at the end.

Words Per Line applies the word reversal one line at a time, which is the mode to use on a 40-line list where each row has to stay in place. Output regenerates on every keystroke, Copy flashes Copied! for 1.8 seconds, and the reversal is a string operation running in the page with nothing sent anywhere.

Walkthrough: One Note, Four Reversals

Type deploy at 09:30, then rollback ready on a second line, and switch modes:

• Reverse Characters returns ydaer kcabllor above 03:90 ta yolped. A newline is a character like any other, so the lines swap as well.
• Reverse Words returns ready rollback then 09:30 at deploy, treating the newline as whitespace and reversing straight across both lines.
• Reverse Lines returns rollback ready above deploy at 09:30, leaving the words inside each line alone.
• Words Per Line returns 09:30 at deploy above ready rollback, which is the only mode that keeps both the lines and their order.

What Happens When Emoji and Accents Are Reversed

• Character reversal walks UTF-16 code units, so anything above U+FFFF is stored as a surrogate pair and comes back broken. A rocket emoji reverses into two replacement glyphs.
• Combining marks detach from their base letter. résumé survives when the accents are precomposed single code points, and lands on the wrong neighbouring letter when they are decomposed.
• Right-to-left scripts reverse by storage order rather than visual order, so Arabic or Hebrew pasted here will not appear mirrored on screen.
• A trailing newline becomes a leading newline in the two character-and-word modes, which shows up as an empty first line in the output.
• Reverse Lines and Words Per Line are the 2 safe modes for any non-Latin script, since neither reaches inside a word.