Free tools
16 small tools for building a website
The utilities you reach for once a week and never remember the syntax of. No signup, no limits, and nothing you paste is stored.
All but two run entirely in your browserData & encoding
JSON formatter
Pretty-print messy JSON, minify it back down, and get the exact line where it breaks.Base64 converter
Encode text to Base64 or decode it back, with full Unicode support.URL encoder
Percent-encode text for safe use in links and query strings, or decode it back.HTML entities
Turn markup into escaped entities so it shows as text, or decode entities back.SEO & site files
Meta tag generator
Build title, description, Open Graph and Twitter tags, and see how the result looks in search and when shared.robots.txt generator
Build a valid robots.txt, including blocking AI crawlers, without memorising the syntax.Sitemap generator
Paste your list of URLs and get a valid sitemap.xml for Search Console.security.txt generator
Build the file that tells security researchers how to report a vulnerability to you.URL parser
Split any URL into its parts and read the query parameters as a decoded table.Open Graph checker Server
See the social tags a page really serves, and how its link preview will look.Text
Slug generator
Turn a title into a clean URL slug, with accents and umlauts handled properly.Case converter
Convert between sentence case, title case, camelCase, snake_case, kebab-case and more.Word counter
Count words, characters, sentences and reading time, and check text against SEO limits.Lorem ipsum
Generate placeholder paragraphs, sentences or words for a layout.A note on privacy
Every tool here except the DNS lookup and the Open Graph checker does its work in your browser. Nothing you paste is uploaded, and there is no server route behind them to upload it to — open your network tab and watch. The two exceptions are marked, and they are marked because they genuinely cannot work any other way: a browser cannot make a DNS query, and it cannot read another site's HTML. Both pass on only what they must and keep no record of it.
Or skip the tools and describe the website
relivo writes the meta tags, the sitemap and the robots.txt for you — along with the rest of the site.