merro.app
A collection of small, useful apps that run entirely in your browser — a Nepali (Bikram Sambat) calendar with tithi and holidays, BS⇄AD date converter, world time globe, timezone and epoch converters, a mortgage calculator, and everyday developer tools like JSON formatters, a JWT debugger, and a cron parser. Free, fast, and no sign-up.
Nepali tools
Nepali Calendar
Bikram Sambat calendar with AD conversion, tithi, moon phase, and holidays.
BS ⇄ AD Date Converter
Convert a single date between Bikram Sambat and Gregorian instantly.
Nepali Number Tools
Devanagari digits converter and numbers in Nepali words (lakh/crore).
Preeti ⇄ Unicode
Convert legacy Preeti font text to Unicode Nepali and back.
Time & dates
World Time Globe
Interactive day/night globe — hover major cities for their current local time.
Timezone Converter
Convert a date and time between any two IANA timezones.
Meeting Planner
Compare working hours across cities to find overlap.
Epoch Converter
Unix epoch ⇄ timestamps in any timezone, with code snippets for 9 languages.
Converters & calculators
Mortgage Calculator
Monthly payment, total interest, and yearly amortization for a fixed-rate loan.
Unit Converter
Length, weight, temperature, and data (KB and KiB) conversions.
Color Converter
HEX ⇄ RGB ⇄ HSL with WCAG contrast ratios.
Number Base Converter
Decimal, hex, octal, and binary — synced as you type.
Developer tools
JSON Tools
Format, minify, sort keys, escape, plus CSV and YAML conversion.
JWT Debugger
Decode JWT header and payload locally, with expiry checks.
Hash Generator
SHA-1, SHA-256, SHA-384, SHA-512 hashes via Web Crypto.
UUID Generator
Generate v4 UUIDs in bulk.
Regex Tester
Live regex matching with highlighting and match list.
Cron Parser
Plain-English cron descriptions and next run times.
URL Tools
URL encode/decode and parse a URL into its parts.
Base64 Tools
UTF-8 safe Base64 and Base64URL encode/decode.
String Tools
Trim whitespace, dedupe/sort lines, case conversion, stats.