Converters
Apps for converting units, timestamps, numeric representations, and other formats.
Barcode Generator
Create EAN-13/JAN, EAN-8, UPC-A, ITF-14, Code 128, Code 39, and Codabar (NW-7) barcodes and save them as PNG or SVG. Check digits are calculated or verified automatically, and you can set the narrow bar width and bar height in millimetres for print. You can also lay out many barcodes, one per line or as a numbered series, on a printable A4 or Letter PDF.
Japanese Address to English Converter
Convert a Japanese address to English. Prefectures and municipalities are romanized automatically, and the block, building and room are put in English order, with a field-by-field view for overseas forms and the phone number written from +81.
QR Code Generator
Generate a QR code image from text or a URL and download it as a PNG or as an SVG that stays sharp at any size. Enter a network name and password to make a QR code that joins Wi-Fi when scanned, or a name, phone number, and email address to make one that adds a contact (vCard).
Unit Converter
Convert length, weight, volume, area, and speed between metric and imperial units, and temperature between Celsius, Fahrenheit, and kelvin. Data sizes such as GB and GiB are covered too. Lists the value in every unit of the category, each ready to copy as a number.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal — edit any field and the others update automatically, with optional 8- to 64-bit two's complement.
Unix Timestamp Converter
Convert between Unix timestamps and dates. Detects seconds, milliseconds, microseconds, and nanoseconds from the digit count or lets you choose the unit, and shows both UTC and local time. When converting a date, choose whether it is read as local time or UTC.
Kanji Numeral Converter
Convert numbers into kanji numerals (一万二千三百四十五), digit-by-digit kanji (二〇二六), and daiji (壱万弐千参百四拾五), and read kanji numerals and daiji back into numbers, with the receipt amount form and the 1万2345 style shown together, and a list with one number per line converted at once.
Morse Code Translator
Translate text into Morse code and Morse code back into text, in International code or Japanese Wabun code. Listen to it at your chosen speed and pitch, save it as a WAV file, and look codes up in the chart.
Phonetic Alphabet Converter
Spell letters, digits, and Japanese kana one by one with phonetic alphabet code words such as Alfa, Bravo, and 朝日のア, so they are not misheard over the phone or radio. You can also turn code words back into text.
Kana to Romaji Converter (Hepburn)
Convert hiragana and katakana to Hepburn romaji. Choose the passport spelling for names (long vowels left out, M before B, M and P) or Japan's 2025 official spelling, with long vowels marked by a macron or written as the kana spell them.
Time Zone Converter
Convert a date and time between cities and see the time difference. Covers 36 cities plus UTC, applies daylight saving time for the date you enter, and tells you when the result falls on the previous or next day. Add up to four more cities to compare the same moment side by side.
Roman Numeral Converter
Convert numbers from 1 to 3999 into Roman numerals (I, V, X, L, C, D, M) and Roman numerals back into numbers, with a breakdown of what each group of symbols stands for. Dates can be written field by field, and numerals can be output in lower case.
Japanese Era Converter
Convert between Western years and Japanese era years (Meiji, Taisho, Showa, Heisei, Reiwa), with both eras shown for a changeover year, plus the weekday, zodiac and nearby years. A pasted list of dates converts in one go.
