Free online SEO and marketing tools

Open-source page audit that tests front-end quality and performance issues in a page.

Open source tool that writes alt text for an uploaded image.

Client-side generator that turns question and answer pairs into FAQPage JSON-LD, downloadable as JSON or HTML.

Produces an Instagram caption and about ten hashtags in a chosen tone.

Meta tag generator in a 100+ tool site that also has keyword density, sitemap, robots.txt and Open Graph tools.

Builds campaign links and validates UTM parameters against GA4 rules to catch attribution mistakes.

Previews a title and description as they would appear in Google search, privately in the browser.

Builds UTM links and also offers meta tag, OG preview and JSON tools, with saved templates.

Creates FAQPage JSON-LD from Q&A pairs, with data kept in the browser.

Measures a page title and meta description in pixels as well as characters and gives length advice.

Counts single words and phrases in text and works offline, with content staying on the device.

Client-side form that appends UTM parameters to a URL for traffic attribution.

Drafts headline and description variants for search ads.

Writes search-snippet meta descriptions from a page topic or text.

Writes e-commerce product descriptions from product details.

Creates YouTube video descriptions from a topic or summary.

Scores how strong the opening line of a video script is, part of a set of 25+ YouTube SEO helpers for creators.

Turns a landing page description into headline, long headline and description variants for Google Ads.

Writes a Google Business Profile description from business details with AI.

Calculates engagement rate for an account and compares it with industry benchmarks.

Counts how often each word or phrase appears in pasted text and shows the percentage share for each.

Generates LocalBusiness JSON-LD markup for Google from business details.

Turns a list of URLs into one compact regex for Search Console and GA4 filters, within their length limits.

Tests whether a URL is allowed or blocked by a robots.txt file for a chosen crawler.