Humanizer Tool – AI Humanizer & AI Detector

Humanize AI-generated text and check how likely any text is AI-written, right in the text field where you write.

Humanizer Tool brings humanizertool.io and aidetectortool.io into your browser. Select text in any field on any page and make AI-generated writing sound natural, or check how likely it is to be AI-generated. No copy-paste, no tab switching. HOW IT WORKS 1. Select text on any page. 2. Right-click → "Humanize with Humanizer Tool" or "Check for AI with Humanizer Tool" (or click the small floating button next to your selection). 3. Replace the selection in place (text fields and editors) or copy the result. Open the side panel for the full editor. FEATURES • Inline humanizer: rewrite selected text for natural flow, tone and readability. 8 styles (Neutral, Academic, Business, Creative, Technical, Friendly, Informal, Custom), 3 lengths, 3 similarity levels. • AI likelihood check: 0–100 % score, verdict (likely human / mixed / likely AI) and highlighted sentences that look AI-generated. • Replace in place in text fields, comment boxes and rich-text editors; one-click copy where an editor does not allow replacing in place. • 60+ output languages — keep the original language or translate while humanizing. • Side panel editor for longer texts: tune options, compare results, check them for AI. • Writing tools for the text you select — the same commands as the KeyAI keyboard: Grammar, Paraphrase, Translate (28 languages), Tone (12 tones), Summarize, Reply, Emojify, Ask AI, Email writer, and a Library of 87 ready-made prompts (tweets, emails, texts, study notes…). • Interface in English, Russian, Spanish, Indonesian, Filipino, Hindi, German, French and Romanian. WORKS IN Any page and any text field, including web mail, online documents, note apps and social networks. Where an editor does not allow replacing text in place, the result is one click to copy. PRIVACY We only send the text you select or paste, and only when you click Humanize or Check. The extension never reads your pages, browsing history or other tabs, and we do not store your text. Optional anonymous usage statistics (event names only) can be turned off in the options. Privacy policy: https://humanizertool.io/en/privacy#extension FREE VS PRO Free to install. Free tier: 3 humanizations, 10 AI checks and 5 writing-tool actions per day (+5 bonus humanizations on install), up to 300 words per request, 4 styles. Pro (optional subscription, $9.99/month or $59.99/year): 50,000 words per month across humanize and writing tools, up to 1,500 words per request, unlimited AI checks (up to 3,000 words), all 8 styles + custom style, length & similarity controls, priority processing, sync across devices. The websites humanizertool.io and aidetectortool.io remain free. Humanizer Tool improves readability and tone of AI-assisted writing and estimates AI likelihood. It does not guarantee any outcome with third-party detection systems — please follow your school's, employer's or platform's policies. Not affiliated with any third-party AI or detection provider. Support: humanizertool@proton.me · https://humanizertool.io/en/contacts