Web tools · Zero backend
Free online utilities — run in your browser
TechPartner client-side utilities—no signup. Each tool has its own URL for search discovery.
Solar to lunar calendar & weekday
Convert Gregorian dates to Vietnamese lunar calendar, weekday, and stem-branch (Can Chi)—free, runs in your browser.
Open tool →Character, word & line counter
Count characters (with/without spaces), words, and lines—handy for SEO, ads, and meta descriptions.
Open tool →JSON formatter & validator
Pretty-print and validate JSON online—data never leaves your browser.
Open tool →Uppercase, lowercase & title case
Convert text case for titles, slugs, and social copy—instantly in the browser.
Open tool →Random password generator
Generate strong passwords with length and charset options—uses crypto.getRandomValues.
Open tool →BMI calculator
Calculate BMI from height (cm) and weight (kg) with WHO categories—for reference only.
Open tool →Loan installment calculator
Estimate monthly payments (principal + interest) from amount, annual rate, and term—standard amortization.
Open tool →
Utility pages can earn search traffic when each URL has clear metadata, FAQs, internal links, and fast loads—a solid complement to service content if the tools are genuinely useful.
Read our affiliate static-site guide or contact TechPartner for a branded utility site.
FAQ
Is my input stored on your server?
No. Everything runs locally in your browser.
Do utility pages help SEO?
Yes, when each page matches search intent, has unique copy and FAQ, and avoids thin duplicate spam.