What is MiniTools?
MiniTools is a free collection of online utilities that run entirely in your browser: text tools, developer tools and calculators.Text tools: remove duplicate lines, remove empty lines and sort lines, with options to trim spaces, normalise whitespace and ignore letter case. Useful for cleaning CSV exports, keyword lists, mailing lists and log output.Developer tools: what's my IP, user agent parser, Unix timestamp converter, SHA-256 hash generator, Base64 encode and decode, UUID generator and JSON formatter.Calculators: BMI, loan payment and percentage calculators that show the full working, not just the answer.What makes it different: nothing is uploaded. All processing happens locally with the Web Crypto API and standard browser APIs, so sensitive data never reaches a server and never leaves your machine. No account, no sign-up, no usage limit.Fast by design: the site is a static bundle served from the edge, so each tool loads quickly and keeps working once cached.
