Free SEO & webmaster tools
No login · Zero barrier · Fast client-side runs. Cover crawler rules, sitemaps, bulk domain cleanup, and GEO optimization.
Robots.txt Checker
Free browser-based robots.txt checker for developers and SEOs.
Sitemap Checker
Free browser-based sitemap checker for developers and SEOs.
Domain Extractor
Free browser-based domain extractor for developers and SEOs.
URL Slug Generator
Free browser-based url slug generator for developers and SEOs.
Keyword Density
Free browser-based keyword density for developers and SEOs.
Text Deduplicator
Free browser-based text deduplicator for developers and SEOs.
Template Replacer
Free browser-based template replacer for developers and SEOs.
llms.txt Generator
Free browser-based llms.txt generator for developers and SEOs.
SERP Preview
Free browser-based serp preview for developers and SEOs.
Schema Generator
Free browser-based schema generator for developers and SEOs.
Token Cost Calculator
Free browser-based token cost calculator for developers and SEOs.
HTTP Status Checker
Free browser-based http status checker for developers and SEOs.
API cURL Generator
Free browser-based api curl generator for developers and SEOs.
Meta Tag Generator
Free browser-based meta tag generator for developers and SEOs.
UTM Builder
Free browser-based utm builder for developers and SEOs.
Redirect Checker
Free browser-based redirect checker for developers and SEOs.
Hreflang Generator
Free browser-based hreflang generator for developers and SEOs.
Title & Description Checker
Free browser-based title & description checker for developers and SEOs.
Canonical Generator
Free browser-based canonical generator for developers and SEOs.
Word Counter
Free browser-based word counter for developers and SEOs.
Markdown Table Tool
Free browser-based markdown table tool for developers and SEOs.
Base64 Converter
Free browser-based base64 converter for developers and SEOs.
JSON Formatter
Free browser-based json formatter for developers and SEOs.
DNS Checker
Free browser-based dns checker for developers and SEOs.
HTML Entity Converter
Free browser-based html entity converter for developers and SEOs.
Website History
Free browser-based website history for developers and SEOs.
Private & fast
Text, regex, and domain cleanup tools run 100% in your browser — sensitive data never leaves your device.
GEO & AI search ready
Built for generative search standards — llms.txt generation and AI crawler diagnostics included.
Developer API ecosystem
Hit a batch ceiling? Connect CallAI DataForSEO and LLM APIs with USDT from $1 and Python/Node automation.
Need large-scale automation and AI generation?
CallAI offers DataForSEO proxy access plus Claude 3.7 / DeepSeek R1 / GPT-4o. One wallet, $1 top-ups, no foreign card — USDT settles on-chain instantly.
Webmaster tools FAQ
Do these webmaster & SEO tools require login or payment?
All tools are free and require no login. Text, slug, density, token estimates, HTTP status lookups, and code generators run locally in milliseconds. Robots and Sitemap tools only fetch the public files you specify.
Which checkers and utilities are included?
AI token cost calculator, HTTP status & API error lookup, OpenAI Base URL multi-language code generator, robots.txt & AI crawler diagnostics, sitemap validation, bulk domain extraction, template placeholder replace, URL slug generator, keyword density, text dedupe, llms.txt generator, Google SERP preview, and JSON-LD schema generator. Hub: https://callaiapi.com/en/tools
What is GEO (generative engine optimization)?
GEO targets ChatGPT Search, Perplexity, Claude, and similar AI search: allow GPTBot/ClaudeBot, publish llms.txt, and write citable facts with FAQ and JSON-LD. CallAI provides matching free tools plus DataForSEO and LLM APIs.
How do I automate after a few manual checks?
The same CallAI API key works with DataForSEO (SERP, keywords, backlinks) and Claude 3.7 / GPT-4o / DeepSeek R1. No foreign card — USDT from $1, pay as you go.
Is my data used for training or leaked?
Client-side tools do not upload your content. Robots/Sitemap checks only request the public robots.txt or sitemap.xml on the target site; results are cached briefly for cost control.