InYourHand

Convert Japanese eras and Western years

Enter a date or an era year to see the Western year, Japanese era, zodiac, age and world calendars.

  • No registration, No login
  • Zero privacy leaks
  • No AI training
  • Free forever
  • Eco: no server processing: Processing happens only on your device. No data-center power or cooling water is used.

🤲Your files are yours. Keep them in your hand.

Options

Direction
Age table (from 1920)

Dates before Meiji 6 (1873) used the lunar calendar and may differ.

How to use Japanese Era Converter

  1. Type the text or URL you want to turn into a QR code.
  2. Reorder or adjust the settings, then hit the big button.
  3. When it's ready, click "Save." Your files never leave your device.

FAQ

How are years with an era change shown?

Date conversion switches eras on the exact day. The age table uses the era at the end of each year.

How are world calendars calculated?

With the calendar support built into your browser (Intl). Wording may differ slightly by browser.

Is it safe to use Japanese Era Converter with my files?

Yes. Your files are never uploaded — they're processed only inside your browser. Every page is served with a policy that blocks outgoing connections (Content-Security-Policy connect-src 'none'), and the counter in the bottom-left shows the data sent: 0 bytes.

Is it free? Do I need an account?

It's completely free, no account needed, and there are no usage limits.

Does it work on my phone?

Yes. It works in mobile browsers on iPhone and Android. For very large files, a computer will be faster.

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