Instantly detect whether text was written by ChatGPT, Claude, Gemini, or another AI model. Paste any content and get a human vs AI probability score — perfect for educators, editors, and publishers verifying content authenticity.
Generate a complete robots.txt file that blocks AI training bots like GPTBot, ClaudeBot, and Google-Extended — while keeping your SEO intact. Choose exactly which crawlers to allow or block with one click, then download instantly.
Count tokens and estimate API costs for GPT-4o, GPT-4, GPT-3.5, Claude 3, and Gemini before you send your prompt. See real-time token usage, context window fill percentage, and per-model cost breakdown — all free, no key needed.
🤖 Free AI Tools — Built for Creators, Writers & Developers
Our free AI tools are designed for anyone working with artificial intelligence on a daily basis — whether you are a content creator using our AI Content Detector to check if writing sounds human, a website owner using our Robots.txt Generator to protect your content from AI scrapers, or a developer using our ChatGPT Token Counter to manage API costs across multiple LLM providers.
Every tool on this page is 100% free, requires no account or signup, and runs entirely in your browser. Your content is never sent to any server — all processing happens locally using JavaScript, so your data stays completely private.
✅ All AI tools are browser-based. No data is transmitted, stored, or logged. Paste your content, get your results instantly, and close the tab — nothing leaves your device.
📋 What AI Tools Are Available?
We currently offer three free AI tools covering content detection, website protection, and token cost estimation — with more planned. Here is a detailed breakdown of each tool:
Paste any text and instantly find out whether it was written by a human or generated by an AI model like ChatGPT, Claude, or Gemini. Our free AI Content Detector returns a probability score showing how likely the content is AI-generated — useful for educators grading assignments, editors reviewing submissions, or publishers verifying authenticity. OpenAI themselves acknowledge that AI detection is an active area of research.
Generate a fully customized robots.txt file that blocks AI training crawlers — including GPTBot (OpenAI), ClaudeBot (Anthropic), Google-Extended, CCBot, and more — while keeping your site fully visible to Google, Bing, and other search engines. Our free Robots.txt Generator lets you download the file instantly and upload it to your server root. Google’s official robots.txt documentation explains how crawlers read and respect these rules.
Count tokens and estimate API costs for GPT-4o, GPT-4, GPT-3.5, Claude 3, and Gemini before you send your prompt. Our free ChatGPT Token Counter shows real-time context window fill percentage, remaining capacity, and exact cost per model — so you never hit unexpected API bills. See OpenAI’s official API pricing to cross-reference the rates. No API key required.
🎯 Who Are These AI Tools For?
Our free AI tools are built for a wide range of users who interact with AI-generated content or AI APIs on a regular basis:
Use the AI Content Detector to check student submissions for AI-generated writing — paste any essay or assignment and get an instant human vs AI probability score.
Verify that freelance submissions or AI-assisted drafts read as human-written before publishing. Protect your publication’s credibility with a quick content authenticity check.
Use the Token Counter to plan prompts, estimate API budgets, and optimize context window usage across GPT-4o, Claude 3, and Gemini before running expensive API calls.
Generate a robots.txt file that stops AI companies from scraping your content for training data — without harming your Google rankings or blocking legitimate search crawlers.
Screen contributed articles, press releases, and user-generated content for AI authorship before publication — maintain editorial standards without expensive enterprise software.
Control your AI API spend by estimating token costs before building features. The Token Counter shows you exactly what each prompt costs across every major LLM provider.
✨ Key Features Across All AI Tools
All tools return results in under a second — no server round-trips, no waiting screens.
Everything runs in your browser. Your text is never sent to any server or stored anywhere.
No subscriptions, no credits, no hidden limits. Every tool is free forever with no account needed.
Works on desktop, tablet, and mobile — use any tool from any device without installing anything.
Covers all major AI models — GPT-4o, GPT-4, Claude 3, Gemini, and GPT-3.5 in one place.
Download your robots.txt file, copy results to clipboard, or export data directly from the tool.
🛡️ Why Block AI Crawlers With Robots.txt?
Since 2023, major AI companies including OpenAI, Anthropic, Google DeepMind, and Common Crawl have been actively crawling the web to collect training data for their large language models. Unless you explicitly block these crawlers in your robots.txt file, your content may be used to train AI models without your consent or compensation.
Our free Robots.txt Generator lets you block specific AI training bots — GPTBot (OpenAI), ClaudeBot (Anthropic), Google-Extended (Google DeepMind), CCBot (Common Crawl), and others — while keeping Googlebot, Bingbot, and other legitimate search crawlers fully active. This protects your intellectual property without any impact on your SEO rankings.
📊 Understanding AI Token Costs
One of the most misunderstood aspects of working with AI APIs is token pricing. Every API call to GPT-4o, Claude 3, or Gemini is billed per token — not per word or per request. A token is roughly 3–4 characters of English text, meaning a 500-word article contains approximately 650–700 tokens. OpenAI’s tokenizer tool can help you visualize exactly how text is split into tokens.
The cost difference between models is significant. GPT-4 costs up to $30 per million tokens, while GPT-3.5 costs just $0.50 per million tokens — a 60x difference. Gemini is even cheaper at $0.075 per million tokens for most use cases. Our free ChatGPT Token Counter helps you choose the right model for each use case by showing the exact cost per prompt across all major providers before you commit to an API call.
❓ Free AI Tools — Frequently Asked Questions
Are these AI tools really free with no limits?
Yes — all three AI tools on this page are completely free with no usage limits, no account required, and no hidden fees. There is no daily cap on the number of times you can use any tool. Everything runs in your browser using JavaScript, so there are no server costs that would require us to limit usage.
How accurate is the AI Content Detector?
Our AI Content Detector uses linguistic pattern analysis to identify characteristics common to AI-generated text — including sentence uniformity, vocabulary predictability, and structural patterns typical of large language models. Like all AI detection tools, it provides a probability score rather than a definitive verdict. It is most reliable on longer texts (300+ words) and performs best when detecting content from GPT-4, GPT-3.5, and Claude models.
Will blocking AI bots in robots.txt hurt my Google rankings?
No — blocking AI training crawlers in your robots.txt file has no effect on your Google rankings. Our Robots.txt Generator is specifically designed to only block AI data collection bots like GPTBot and ClaudeBot, while leaving Googlebot, Bingbot, and all other legitimate search engine crawlers fully active. Your SEO performance remains completely unaffected.
Which AI models does the Token Counter support?
Our free ChatGPT Token Counter currently supports GPT-4o, GPT-4, GPT-3.5 Turbo, Claude 3, and Gemini. Each model shows its context window size, current API pricing per million tokens, and the exact estimated cost for your specific prompt. We update pricing regularly to reflect current OpenAI and Anthropic pricing.
Is my content safe when I use these tools?
Completely. All three AI tools run entirely in your browser using client-side JavaScript. When you paste text into any of our tools, that text is processed locally on your device — it is never transmitted to our servers, never stored in a database, and never logged. Closing the tab erases all data. Your content is 100% private.
Are more AI tools being added?
Yes — we are actively building new free AI tools. Planned additions include a Reading Level Checker, an AI Prompt Generator, and a Paraphrasing Detector. All new tools will follow the same principles: free forever, no signup, browser-based, and privacy-first. Check our free tools page for new additions.
All AI tools run 100% in your browser. No data is sent to any server. Free forever — no account required.