Free tools

Nine tools. No signup, no upload, no catch.

Every tool on this page runs entirely in your browser. Nothing you paste is sent to a server, logged, or stored — including by us.

Content

Content tools

Content
SERP Snippet Preview
See how your page appears in Google before you publish, with pixel-accurate truncation warnings.
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Content
Keyword Density Checker
Word counts, density percentages and n-gram frequency for any block of text.
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Content
Readability Checker
Reading ease, grade level, sentence length distribution and long-sentence flags.
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Content
Word & Character Counter
Words, characters, sentences, paragraphs, reading time and speaking time — instantly.
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Technical

Technical
Schema Markup Generator
Valid JSON-LD for the six schema types that matter most, generated from a simple form.
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Technical
Robots.txt Generator
Generate robots.txt rules for search crawlers and AI crawlers, with the distinctions that actually matter.
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Technical
UTM Campaign Builder
Generate clean, consistent campaign URLs with enforced lowercase and no-space naming.
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Technical
Hreflang Tag Generator
Build reciprocal hreflang annotations with correct ISO codes and an x-default fallback.
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AI search

AI search
AI Crawler Access Checker
Test any URL against your robots.txt for every major AI and search crawler at once.
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Free tools tell you what is wrong on one page. Aeologic tells you which of your ten thousand pages to fix first, and then fixes them.

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