About this tool
This tool tells you whether text reads the same forwards and backwards. Everything runs locally in your browser and nothing you type is uploaded or stored.
The method is simple and standard: the input is normalized by lowercasing it and stripping every character that is not a letter (a–z) or digit (0–9), so spaces, punctuation and capitalization are ignored. The normalized string is then compared to its own reverse; if they are identical, the text is a palindrome. This handles multi-word phrases like "A man, a plan, a canal: Panama" and numbers like 12321.
Type any word, sentence or number to see an instant yes/no verdict, plus the normalized string, its reverse and the character count. Enable "check each line" to test several candidates at once, one per line.