Text Tools
Character count, full-width/half-width conversion, text diff comparison, and more — handle everyday text processing right in the browser. No sign-up required.
Text Tool List
Character Counter
Count characters, words, lines, and bytes in real time. Great for social media posts and reports.
Fullwidth / Halfwidth Converter
Convert between fullwidth and halfwidth characters. Also supports katakana-hiragana conversion for data cleanup.
JSON Formatter & Validator
Pretty-print or minify JSON data. Catch syntax errors instantly with line numbers and tree view.
Text Diff Checker
Compare two texts side by side and highlight every difference. Character-level detection with merge support.
Japanese Era Converter
Convert between Western calendar years and Japanese era names (Reiwa, Heisei, Showa). Includes age calculator.
Password Generator
Generate strong, random passwords instantly. Customize length, character types, and check strength.
🔒 Your files are never sent to a server
All file processing runs entirely in your browser.
Text Articles
All articlesJapanese Era Notation Rules for Business Documents | Wareki vs. Western Calendar
Learn when to use Japan's traditional era calendar (wareki) versus the Western calendar (seireki) in business documents. A guide covering contracts, invoices, resumes, and more.
How to Calculate Your Age from Birth Year | Japanese Era & Western Calendar Reference Table
Learn how to calculate age from a birth year in Japan's wareki or Western calendar. Includes a 2026 age reference table for Reiwa, Heisei, and Showa, plus school enrollment and graduation years.
Japanese Era Names Explained: Reiwa, Heisei, Showa, Taisho, Meiji — Complete Timeline
A complete overview of Japan's five modern era names — Reiwa, Heisei, Showa, Taisho, and Meiji. Covers dates, durations, historical events, and easy conversion formulas.
Reiwa to Western Year Conversion Table [2019–2030]
A quick-reference table for converting between Japan's Reiwa era and Western calendar years. Covers Reiwa Gannen (2019) through Reiwa 12 (2030), with an easy formula and common lookups.
Best Japanese Era Converter Tools Compared (2026) | Free Options
A comparison of free Japanese era conversion tools (wareki ↔ seireki). Covers features, usability, and supported date ranges to help you choose the right tool for your needs.
Japanese Era ↔ Western Year Quick-Reference Table [2026 Edition]
A complete quick-reference table for converting between Japan's wareki (era calendar) and Western years. Covers Reiwa, Heisei, Showa, Taisho, and Meiji with ages as of 2026. Perfect for resumes and official documents.