Get a quick estimate of the probability that a text was written by AI. Paste your text and receive a simple percentage score in seconds.
Zekai Verdict
- What is it?
- Isgen is a free web-based tool designed to analyze a piece of text and calculate the likelihood that it was generated by an AI model.
- Best for
- Editors
- Price
- Free plan
- Zekai Score
- 7.3/10
Isgen is a free online tool that estimates whether a piece of text was written by AI. You paste text into the website, and it provides a percentage score indicating the probability of AI generation. It is a simple, fast tool for a preliminary check.
Your workflow, automated
Before & After
You're unsure if a piece of text was written by a person or an AI.
UncertaintyYou have a probability score to help inform your judgment about the text's origin.
Probability ScorePrompts for Educators
Trusted by professionals
Is Isgen worth it?
Why Education & E-learning choose this tool
Key Use Cases
Isgen is a fast, no-frills tool for getting a basic probability score on a text's AI origins. Its simplicity is its main strength, but remember that AI detection is probabilistic. A score must never be used on its own to accuse anyone, as false positives on genuine human writing are a known issue.
Frequently asked questions
Can I use an Isgen score to prove a student or writer cheated?
Last reviewed:
Isgen pricing and plans
Prices and features are updated regularly but can change at any time — always confirm on the official website. Some links on this page are affiliate links.
Top 10 AI tools in this category
Get Isgen deal alerts
Be the first to know when Isgen drops a new discount, adds features, or changes pricing.
More on AI for Education & E-learning
Latest AI news
About Isgen
Full Description
Isgen is a free web-based tool designed to analyze a piece of text and calculate the likelihood that it was generated by an AI model. You paste your content into the tool, and it returns a single percentage score indicating the AI probability.
Editorial Verdict
Isgen is a fast, no-frills tool for getting a basic probability score on a text's AI origins. Its simplicity is its main strength, but remember that AI detection is probabilistic. A score must never be used on its own to accuse anyone, as false positives on genuine human writing are a known issue.
Edpuzzle
Brisk Teaching
MagicSchool AI




