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198+ free tools, built to be used — not signed up for
SEO audits, developer utilities, AI cost calculators, startup metrics, marketing math and more. Every tool runs in your browser wherever possible, with no account and no paywall.
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By category
SEO & Website Audit
40Sitemaps, crawlability, metadata and technical SEO checks.
Developer Utilities
39Formatters, converters, encoders and inspectors for everyday engineering work.
AI Tools
19Token counters, cost calculators and prompt utilities for building with language models.
Startup & SaaS
19Metrics calculators for founders: unit economics, fundraising, pricing and growth.
Marketing & Growth
11Campaign math, UTM building, conversion metrics and content generators.
Career & Salary
10Compensation calculators and job-search utilities, connected to Internet Compass salary data.
Finance & Business
17Interest, loans, margins, valuation and everyday business arithmetic.
Text & Writing
6Counters, case converters, cleaners and text comparison.
Data & Document Conversion
6Convert between JSON, CSV, XML, YAML, Markdown, HTML and more.
Image & Design
16Compress, resize, convert and generate images and design assets in the browser.
Internet & Networking
7DNS, IP, WHOIS and HTTP inspection tools.
Productivity
8Timers, date math and everyday decision utilities.
Featured
Popular tools
OG Image Generator
Designs a branded 1200×630 social share image directly in the browser.
DNS Lookup
Looks up A, MX, TXT, NS and other DNS records for a domain.
Indexability Checker
Checks whether a page allows indexing via meta robots and X-Robots-Tag.
Website SEO Audit
Runs a composite technical SEO check across title, meta, headings, structured data and HTTPS.
Schema Markup Generator
Builds JSON-LD structured data from simple key:value input for common Schema.org types.
llms.txt Generator
Builds a valid llms.txt file describing a site's structure for language models.
AI Search Readiness Checker
Audits a page's technical signals for AI answer-engine visibility.
AI Token Counter
Counts tokens in any text using a real BPE tokenizer, not a word-count approximation.
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