# GPTinf

> AI humanizer, detector, and plagiarism checker in one writing toolkit

- **Website**: https://www.gptinf.com/
- **Uneed Page**: https://www.uneed.best/tool/gptinf
- **Pricing**: Freemium
- **Category**: Marketing
- **Tags**: Writing, Productivity, AI
- **Submitted by**: @yuliia.muraviova-1f2c
- **Launch Date**: 2026-08-21
- **Social Links**: [Twitter](https://x.com/GPTinf_com) | [LinkedIn](https://www.linkedin.com/company/gptinf/) | [Instagram](https://www.instagram.com/gptinf/) | [Facebook](https://www.facebook.com/people/GPTinf/61559561760850/)

## About

AI drafts read like AI. Same sentence rhythm, the same "furthermore," the same flat tone — and editors, clients, and detectors all pick up on it.

GPTinf is an all-in-one AI writing toolkit that handles that in one place: AI Humanizer, AI Detector, Plagiarism Checker, Grammar Checker, Paraphraser, and Readability Checker.

AI Humanizer — restructures sentences at the grammatical level instead of swapping synonyms, so your meaning and register survive the rewrite. 8 modes (Standard, Academic, Formal, Simple, Informal, Expand, Shorten, Creative), paste text or upload PDF, Word, and plain text files, and freeze any words or phrases you don't want touched — unlimited freeze keywords on every plan, including free.

AI Detector — free, unlimited, no account required. Cross-checks against 8 detectors (Turnitin, Originality.ai, GPTZero, Copyleaks, Sapling.ai, Crossplag, Gowinston.ai, ZeroGPT) with pass/fail per detector and color-coded segments. It also runs automatically after every humanization, so you see the score without clicking anything.

Plagiarism Checker — sentence-level source attribution with exact URLs and match percentages. In our own head-to-head test on the same passage it surfaced 152 sources; the next-closest tool found 14.

Grammar Checker — self-hosted engine, so your text never passes through third-party servers. Catches grammar, spelling, and the contextual mistakes a spell-checker misses. Paraphraser — 7 writing styles, same rewriting engine. Readability Checker — Flesch score mapped to a grade level, built specifically for AI-generated content.

Free tier: 300 words per request, no account needed, file upload and the full detector included. Paid plans start at $9.99/mo for 5,000 words, $24.99/mo for 25,000.

Built for content teams, freelancers, bloggers, SEO writers, students, and non-native English speakers who want the speed of AI without the tells — and who'd rather check their own text than find out after they publish.