SEO tools calculators
6 free tools
A small kit of practical SEO tools for writers and marketers — check keyword density, click-through rate, readability, SERP snippet widths, bounce rate, and ad budgets. Everything runs in your browser, so nothing you paste ever gets uploaded.
Estimate the clicks, conversions, and cost per conversion your ad budget will buy at a given CPC.
Work out bounce rate from your sessions and estimate conversions from the visitors who stayed.
Calculate click-through rate, or solve for the clicks or impressions needed to hit a target.
Check how often a keyword appears in your content and what percentage of the words it makes up.
Score any text with Flesch Reading Ease and Flesch-Kincaid grade level to see how easy it is to read.
Check whether your title and meta description fit before Google truncates them in the search results.
Frequently asked questions
Do these SEO tools send my content to a server?
No. Every tool here runs entirely in your browser, so the article you paste, your draft titles, or a client's analytics numbers never leave your device.
What keyword density should I aim for?
There's no magic number, but most people keep a main keyword around 1–2% and let naturally related words fill in the rest. Repeating the exact phrase far more than that reads awkwardly and rarely helps.
Are the pixel and readability estimates exact?
They're solid approximations, not pixel-perfect. Google renders titles in a specific font at different sizes, and readability formulas make assumptions about syllables, so treat the numbers as a reliable guide rather than a guarantee.