Reverse Letters Online — Letter Reverser, Flip Characters & Backwards Text

Full Reverse takes the entire input text and reverses the sequence of every character from end to start. For example: Hello World → dlroW olleH. Spaces, punctuation, and all characters are treated equally and their positions are reversed along with the letters. Per-Word Reverse reverses the letter sequence inside each individual word, but keeps the words themselves in their original left-to-right order. For example: Hello World → olleH dlroW. The word "Hello" becomes "olleH", the word "World" becomes "dlroW", but "Hello" is still first and "World" is still second. Use Full Reverse when you want classic backwards text; use Per-Word Reverse when you want each word to be a mirror of itself but the sentence order intact.

Letters Only mode reverses only the alphabetic characters (a-z, A-Z) while all non-letter characters — spaces, commas, periods, exclamation marks, hyphens, digits, etc. — stay exactly where they are in the original text. The letters are extracted from their positions, reversed as a sequence, and then re-inserted back into the same positions. For example: Hello, World! has letters H-e-l-l-o-W-o-r-l-d. Reversed: d-l-r-o-W-o-l-l-e-H. These get placed back at the letter positions: dlroW, olleH!. Notice the comma, space, and exclamation mark are exactly where they were. This is the mode to use when you want to reverse readable text but keep punctuation in logical positions.

Atbash is one of the oldest known ciphers, dating to around 500–600 BC in ancient Hebrew texts. It is a substitution cipher that maps each letter to its mirror position in the alphabet: A↔Z, B↔Y, C↔X, D↔W, and so on. The name "Atbash" comes from the first, last, second, and second-to-last letters of the Hebrew alphabet. Crucially, Atbash is self-inverse: applying it twice returns your original text. So encoding and decoding are the same operation — just click once to encode, click again to decode. Atbash appears in the Bible (the name "Sheshach" in Jeremiah is the Atbash encoding of "Babel"). Today it's used for puzzles, games, and as an educational introduction to classical cryptography. Numbers and punctuation are passed through unchanged.

ROT13 shifts each letter 13 positions in the alphabet: A→N, B→O, ... M→Z, N→A. Because the English alphabet has 26 letters, ROT13 is self-inverse — apply it twice and you get the original. ROT13 only affects letters; digits, spaces, and punctuation pass through unchanged. It was widely used in online forums and Usenet to hide spoilers and offensive content while still allowing easy decoding. ROT47 extends the concept to all 94 printable ASCII characters (codes 33–126, covering digits, letters, and most punctuation) and shifts each by 47 positions within that range. Like ROT13 it is self-inverse because 94/2 = 47. ROT47 produces a more thoroughly obfuscated output because punctuation and digits are also transformed. Use ROT13 for letter-only obfuscation (text still looks like words); use ROT47 when you want the entire printable ASCII range transformed.

Mirror Unicode mode replaces each letter with a Unicode character that looks like its horizontally flipped (mirrored) version. There is no official Unicode "mirrored alphabet" block — instead, this mode uses characters from other writing systems and the International Phonetic Alphabet (IPA) that happen to look like reversed versions of Latin letters. For example: b → d, d → b, p → q, q → p, E → Ǝ, R → Я (Cyrillic), S → Ƨ. Letters that are already symmetrical — A, H, I, M, O, T, U, V, W, X, Y — stay the same. Letters without a reasonable Unicode equivalent also stay unchanged. The text is also reversed left-to-right so it reads naturally when held up to a mirror.

Normally when you reverse Hello World you get dlroW olleH — the capital H moves to the end because the whole letter sequence is reversed. With Preserve case position enabled, the capitalisation pattern of the input is applied to the output regardless of which letter ends up in which position. So the first letter of the output will always be capitalised (because the first letter of the input was capitalised), and so on for every character position. For Hello World with preserve case: the input pattern is Uuuuu Uuuuu (U=uppercase, u=lowercase). The reversed letter sequence dlrowed olleh gets this pattern applied: Dlrow Olleh. This is useful when you want the result to read as a grammatically normal-looking capitalised sentence even though it's backwards.

A palindrome is a word, phrase, or sequence that reads the same forwards and backwards. The palindrome checker strips spaces, punctuation, and case from your input text and then checks whether the cleaned letter sequence is identical when reversed. For example: A man, a plan, a canal: Panama! → strip to amanaplanacanalpanama → reversed: amanaplanacanalpanama → match → palindrome. The classic status "Yes ✓" indicates a true palindrome when ignoring spaces and punctuation. The Make palindrome button takes your input and appends its reverse, creating a trivially correct palindrome — for example: hello → helloolleH. This is useful for generating palindrome seeds for wordplay or teaching examples.