Paraphraser.io is an online AI paraphrasing tool that rewrites text while preserving original meaning. It uses natural language processing to find synonyms, rephrase sentences, and adjust tone across multiple writing modes. The tool supports over 20 languages and offers features such as freezing specific words, extracting text from images and audio, and speech-to-text paraphrasing. It includes predefined styles like Fluency, Formal, Creative, and Academic, as well as a custom tone option. Paraphraser.io also provides additional utilities including a plagiarism checker, grammar checker, text summarizer, AI essay writer, and AI humanizer. It is available on web and mobile devices, with API integration for institutions.