Word & Character Counter
Live counts for writing, essays, tweets and articles. Includes reading time.
Strong Password Generator
Cryptographically random passwords generated on your device using the Web Crypto API.
JSON Formatter & Validator
Pretty-print, minify, or validate JSON instantly. Errors point to the exact spot.
Color Contrast Checker (WCAG)
Check text and background colors against WCAG AA / AAA readability rules.
Text Case Converter
Switch between UPPERCASE, lowercase, Title Case, sentence case, camelCase, snake_case, kebab-case.
URL Slug Generator
Turn any title into a clean, SEO-friendly URL slug. Removes stop-words optionally.
Unit Converter
Length, weight, temperature, area, volume and data storage — instant conversion.
Age & Date Calculator
Exact age in years, months and days; plus days between two dates — useful for school forms and deadlines.
Percentage Calculator
Three everyday questions: what is X% of Y, X is what % of Y, and increase/decrease between two values.
Placeholder Text Generator
Classic lorem ipsum for mockups, in words, sentences or paragraphs.
Base64 & URL Encoder
Encode or decode Base64 text and URL components. Useful for developers and form fillers.
SHA Hash & Checksum
Compute SHA-1 / SHA-256 / SHA-384 / SHA-512 fingerprints of any text. Uses the browser's built-in crypto - useful for verifying file integrity and checksums.
About & Privacy
MicroTools Hub exists because everyday tools shouldn't demand an account, show a 30-second ad, or ship your text to a server.
Every calculator and converter on this page runs locally in JavaScript inside your browser. Nothing is sent anywhere: no analytics, no cookies, no server requests after the page loads. Turn off your internet after opening this page and everything still works.
Support this project: if a tool saved you time, a small tip keeps these pages free, ad-light and running for everyone. GitHub Sponsors · Patreon · Crypto
Found a bug or want a tool added? Open an issue — requests are welcome.