Free Tools for SEO, Writing and Data

Check any website's Ahrefs Domain Rating (DR) score instantly for free. Powered by the official Ahrefs public API. No signup, no limits.

Identify which Google algorithm update caused your traffic drop. Select a year and month to see all confirmed core, spam, and helpful content updates from 2003 to 2026.

Analyze keyword frequency and density percentage in your content. Spot over-optimization, check target keyword coverage, export results as CSV.

Count words, characters, sentences, paragraphs, reading time, and speaking time in real time. Includes a word limit tracker.

Convert text between lowercase, UPPERCASE, Sentence case, Title Case, alternating, and inverse case. Copy or download the result instantly.

Create {word1|word2|word3} spintax syntax by selecting words and adding synonyms. Also expands existing spintax into unique variations.

Convert a list of items (one per line) to a comma-separated string. Supports custom separators, quote wrapping, deduplication, and sorting.