Reverse Text
Reverse characters, words, or flip lines of text.
Your reversed text will appear here.
This reverses text three ways — character order, word order or line order — with correct handling of emoji and accented characters, entirely in your browser. The Unicode handling is the part that matters technically: reversing a string naively splits multi-byte characters and produces corrupted output, which is why emoji so often break when reversed by simpler tools. JavaScript strings are sequences of UTF-16 code units, and anything outside the Basic Multilingual Plane — most emoji, many CJK extensions — occupies two of them. Reversing code units splits those pairs and yields replacement characters. Iterating by code point instead keeps each glyph intact. So "Hello 👋" reverses to "👋 olleH" rather than a broken symbol. Combining marks remain an edge case: a letter with a separately encoded accent can still detach, which is a limitation of the encoding rather than of the method.
About the Reverse Text
Reverse any text in three different ways — flip the entire string character by character, reverse the order of the words, or reverse the order of the lines. Useful for puzzles, palindromes, creative writing, and quick text transformations.
How to use the Reverse Text
- 01Paste or type your text into the input box.
- 02Pick a mode: reverse characters, reverse words, or reverse lines.
- 03Watch the result update live as you type.
- 04Click "Copy" to send the reversed text to your clipboard.
Why use our Reverse Text
- 01
Three modes
Reverse characters, word order, or line order — whichever transformation you need.
- 02
Unicode-safe
Emoji and multi-byte characters are reversed correctly without breaking glyphs.
- 03
Live preview
The reversed output updates instantly as you type or switch modes.
- 04
100% browser-based
Runs entirely on your device — your text is never uploaded or stored.
Why naive string reversal corrupts emoji
JavaScript strings are sequences of UTF-16 code units, not sequences of characters, and the two are different for anything outside the Basic Multilingual Plane. Emoji, many CJK extension characters and mathematical symbols are encoded as surrogate pairs — two code units that together represent one character. Reversing the code units splits those pairs and swaps their order, producing an invalid sequence that renders as replacement glyphs. Combining marks compound the problem: an accented letter can be stored as a base letter followed by a combining accent, and reversing puts the accent before the letter, attaching it to whatever now precedes it. Skin-tone modifiers and zero-width-joiner sequences, which build composite emoji such as family groups from several component characters, break even more visibly. Correct reversal has to operate on grapheme clusters — what a reader perceives as one character — rather than on code units, which is what this tool does.
The three modes and what each is for
Reversing characters flips the entire string end to end, so 'Hello' becomes 'olleH'. This is the mode people use for puzzles, for checking palindromes, for simple obfuscation and for generating text that reads correctly when mirrored. Reversing words keeps each word intact and inverts their order, turning 'The quick brown fox' into 'fox brown quick The'. This is useful for certain linguistic exercises, for reordering lists that were built backwards, and occasionally for working with languages whose reading direction differs. Reversing lines keeps every line intact and inverts the sequence of lines, which is the genuinely practical one: it turns a chronological log into reverse-chronological order, flips a list that was appended to rather than prepended, and reverses sorted output without re-sorting it. Of the three, line reversal is the mode most likely to solve a real problem rather than a curiosity.
Right-to-left text and why reversal is not translation
A frequent misunderstanding is that reversing text somehow relates to right-to-left scripts such as Arabic and Hebrew. It does not. Those scripts are stored in logical order — the order they are read — and the right-to-left rendering is handled by the Unicode bidirectional algorithm at display time. Reversing an Arabic string does not produce correctly displayed Arabic; it produces the text backwards, exactly as reversing English does. Similarly, reversal is not encryption or encoding: reversed text is trivially recoverable by reversing it again, so it provides no security whatsoever and should never be used to hide anything sensitive. It is occasionally used as a very light obfuscation to defeat naive keyword filters, which works only against the most simplistic matching and is not something to rely on. Treat it as a text transformation, useful and interesting, with no cryptographic properties at all.
The three modes on the same input
| Mode | Input | Output |
|---|---|---|
| Characters | Hello world | dlrow olleH |
| Words | The quick brown fox | fox brown quick The |
| Lines | line1 / line2 / line3 | line3 / line2 / line1 |
| Characters (emoji) | abc👍 | 👍cba |
Emoji reverse as single units here. Tools that reverse UTF-16 code units instead produce corrupted glyphs.
Frequently asked questions
What does reverse characters do?
It flips the whole string so the last character becomes first — 'Hello' becomes 'olleH'. Emoji and accented letters are kept intact.
What does reverse words do?
It keeps each word whole and inverts their order, so 'The quick brown fox' becomes 'fox brown quick The'.
Why does my emoji break when reversed elsewhere?
Emoji are stored as multiple UTF-16 code units. Reversing those units splits the pairs and produces invalid sequences. Correct reversal works on grapheme clusters instead.
Does reversing Arabic or Hebrew display it correctly?
No. Those scripts are stored in reading order and rendered right-to-left by the Unicode bidirectional algorithm. Reversing produces backwards text, not correct display.
Is reversed text a form of encryption?
Not at all. It is recovered by reversing again, so it offers no security. Never use it to conceal anything sensitive.
What is reverse lines useful for?
Turning a chronological log into reverse-chronological order, flipping a list that was appended to, or inverting sorted output without re-sorting.
Does it handle accented characters?
Yes. Combining marks stay attached to their base letters rather than migrating to a neighbouring character as they do with naive reversal.
Can I reverse very long text?
Yes. Processing is local and linear, so long documents are handled without trouble.
Is my text saved anywhere?
No. Everything runs in your browser and nothing is transmitted.
Last updated
Grapheme cluster handling per Unicode Standard Annex 29. Bidirectional rendering per Unicode Standard Annex 9.