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TextToHuman's headline is rare and, this time, real: a completely free tier with unlimited usage, no signup and no card — just a 1,500-word-per-run cap. Most of the category meters its free tier in hundreds of words; this one doesn't meter it at all. The standout workflow is Smart Alternatives: click any sentence in the output and get rewrites with their own detection scores, so you swap line by line until it passes. Independent reviewers consistently rate it the go-to free tool for everyday content — blog, email, social, SEO — and just as consistently flag where it isn't: technical and academic writing, where it loses nuance. Take it as a free, fast everyday humanizer, not a high-stakes one. Free, unlimited, and sentence-level The free tier is the whole reason TextToHuman has the following it does — unlimited runs at 1,500 words each, no account, on a custom model the company says it trained on 30 million-plus samples. Smart Alternatives is the feature that makes it pleasant to use: instead of re-running the whole passage, you click a sentence, see alternative phrasings each scored for AI detection, and keep the one that reads cleanest. A built-in detector scores the text before and after, so the check lives in the same window. Paid Pro adds an Autopilot that picks the approach for you, a more aggressive Stealth mode, a plagiarism checker and 25+ languages. What you get Truly free Unlimited runs, no signup or card; 1,500 words per run (basic mode) Smart Alternatives Click a sentence, get scored rewrites, and swap line by line Built-in detector Scores text before and after, in the same window Custom model Proprietary, trained on a claimed 30M+ samples Pro modes Autopilot (auto-picks the approach) and Stealth (more aggressive evasion) Pro extras Plagiarism checker, cloud-saved history, and 25+ languages How it holds up The independent picture is consistent in its inconsistency. On the easy end, one tester clocked the output at 0% AI on ZeroGPT; a mode-by-mode review put human-classification at 84% on Standard, 91% on Stealth and 96% on Premium — strong, though Copyleaks still flagged the Premium output at 15% AI. Pull back to a broader run across five detectors and the average drops to around 40%, which is the honest tell: results swing hard by detector and by mode. The throughline from reviewers matches the product's own positioning — a genuinely good free tool for everyday content that loses nuance on technical or academic material. So lean on Stealth or Premium plus the built-in check for anything that has to pass, and don't expect consistency on the strictest detectors. The catch Two real limits. Performance is detector-dependent: excellent on the lenient ones, middling-to-shaky on the strict academic ones, so high-stakes work needs verifying mode by mode rather than trusting a single run. And it's built for everyday prose — push technical or academic content through it and the rewrite tends to flatten the precise parts. There's also no API, so it stays a browser tool rather than something you'd wire into a pipeline. The verdict TextToHuman is the easy pick for the everyday content writer — blog, email, social, SEO — who wants unlimited free humanizing with a sentence-level workflow that makes cleanup quick, and who'll reach for Pro's Stealth mode and Smart Alternatives when a piece needs to clear a harder detector. The truly-unlimited free tier is the genuine draw, and Smart Alternatives is the reason to stay. It's the wrong tool for high-stakes technical or academic writing, where the nuance loss shows and the strict detectors get inconsistent. For everyday copy it's hard to argue with free and unlimited; ask it to clear a strict academic detector and you're back to rolling the dice.