# The best free AI content detectors and humanizers Every option in the catalog for when you need to check whether a piece of text reads as AI-written — 7 AI content detectors and humanizers, 4 of them free or freemium, with the pricing tier printed on every row. ## Stats - 7 tools listed - 4 free or freemium - 1 with no paid plan at all - 1 sub-categories covered ## FAQ ### What are the best free AI content detectors and humanizers? Flocci AI Tools lists 7 of them, ordered free tiers first: Sapling AI Detector, Copyleaks AI Detector, GPTZero, Pangram AI Detector and Originality.ai. 4 of the 7 are free or have a free tier. Each entry states what it uniquely does rather than a score. ### Which of these are completely free? 1 on this page are marked fully free with no paid plan at all: Sapling AI Detector. The remaining 6 are freemium, trial or paid, and each is labelled with its exact tier so nothing surprises you at sign-up. ### How is this list ordered? Free tools first, then freemium, then trial, then paid, and alphabetically inside each tier. Nobody pays to appear higher: Flocci AI Tools carries no ads, no sponsored slots and no paid listings, so the order reflects price and nothing else. ## Quick picks ### Which AI content detectors and humanizers work in a browser with no install? Sapling AI Detector, Copyleaks AI Detector, GPTZero and Pangram AI Detector all work in a browser tab with no install needed — just open the site and go. 4 of the 4 free AI content detectors and humanizers listed here are browser-based. ## Tools - [Sapling AI Detector](https://aitools.flocci.in/tool/sapling-ai-detector) — Free — Free probability score that text is AI-generated, with sentence-level highlighting - [Copyleaks AI Detector](https://aitools.flocci.in/tool/copyleaks-ai-detector) — Freemium — Detects AI-generated text and flags likely AI passages sentence by sentence - [GPTZero](https://aitools.flocci.in/tool/gptzero) — Freemium — Free tier plus dedicated Chrome extension and AI Vision (image/document) detection - [Pangram AI Detector](https://aitools.flocci.in/tool/pangram-ai-detector) — Freemium — Detects AI-generated and AI-assisted text from ChatGPT, Claude, Gemini, Grok, Llama and DeepSeek - [Originality.ai](https://aitools.flocci.in/tool/originality-ai) — Trial — Combined AI detection + plagiarism + fact-checking in one scan - [Undetectable AI](https://aitools.flocci.in/tool/undetectable-ai) — Trial — Bundles an AI humanizer with unlimited AI-detection scanning on every paid plan - [Winston AI](https://aitools.flocci.in/tool/winston-ai) — Trial — Image and deepfake detection alongside text AI-detection --- Source: Flocci AI Tools — https://aitools.flocci.in/best/best-ai-content-detection-humanizers Facts last verified: October 2026