Free tools
35 free calculators, generators and AI helpers for bloggers, marketers, designers and small businesses. No sign-up. Everything runs in your browser.
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Preview snippets, count words, check readability and generate the files search engines and AI crawlers read.
See how your title and meta description look in Google — with pixel-width checks.
Generate title, description, canonical, Open Graph and Twitter card tags.
Words, characters, sentences, reading and speaking time, top keywords.
Top one-, two- and three-word phrases with counts and density.
Flesch Reading Ease, grade level and your longest sentences.
Score your blog title for length, clarity, power words and type.
Turn any title into a clean, short, SEO-friendly URL slug.
Build robots.txt, including rules for GPTBot, ClaudeBot and other AI crawlers.
Create an llms.txt file that points AI assistants to your best pages.
Turn questions and answers into valid FAQPage JSON-LD.
Build better prompts, estimate tokens and cost, and brainstorm titles and names.
Build a clear, structured prompt for ChatGPT, Claude or Gemini.
Estimate tokens for a prompt and what an API call or a month of calls will cost.
20 proven headline formats for any keyword — instantly, no sign-up.
Brandable name ideas from your keywords, with one-click domain checks.
Colour, contrast, gradients, units, JSON, Base64, passwords and image compression.
WCAG AA / AAA contrast ratio for text and UI colours.
Complementary, analogous, triadic palettes and a full tint/shade scale.
Linear, radial and conic gradients with live preview and CSS.
Convert pixels to rem/em (and back) with a quick reference table.
Cryptographically random passwords and passphrases, with strength in bits.
Pretty-print, minify and validate JSON, with the exact error position.
Encode or decode Base64 with full Unicode and URL-safe support.
UPPER, lower, Title, Sentence, camelCase, snake_case, kebab-case and more.
Shrink and resize JPG/PNG/WebP to WebP or JPEG — privately, in your browser.
ROI, ad metrics, conversion rate, CAC vs LTV, email ROI, UTM links and website cost.
Return on investment, net profit and annualised ROI for any campaign.
Every paid-ads metric from spend, impressions, clicks, conversions and revenue.
Your conversion rate, and the traffic or conversions needed to hit a goal.
Customer acquisition cost, lifetime value, LTV:CAC ratio and payback period.
Opens, clicks, sales, revenue and ROI from your email list.
Build campaign-tagged URLs for Google Analytics 4.
Estimate what a blog, business site, online store or web app costs to build.
GST, EMI, profit margin, break-even and your freelance hourly rate.
Add or remove GST, with the CGST/SGST or IGST split.
Monthly EMI, total interest and a year-by-year breakdown.
Margin vs markup from cost and price — or the price you need for a target margin.
Units and revenue you need to cover your fixed costs.
The hourly and project rate you need as a freelance designer, developer or marketer.
Every calculator and generator on this page runs in your browser. Nothing you type is uploaded, stored or sold — you can even disconnect from the internet after the page loads and they keep working. They are free, need no sign-up and are built by the same team that writes our guides.
