CharCode Converter

CharCode Converter is a lightweight utility for developers, ROM hackers, and

fan translators working with Japanese text encodings.

Enter raw hex codes and instantly see the corresponding characters — or type

any text and get its byte representation. Two modes, one tool.

── MODES ──────────────────────────────────────

CODE → CHAR

Enter hex bytes using the built-in keypad and decode them into characters

in real time. Each byte group is displayed alongside its decoded character,

so you can inspect multi-byte sequences at a glance.

CHAR → CODE

Type or paste any text and get the full hex byte sequence for each

character. Useful for building search strings or patching ROM data.

── SUPPORTED ENCODINGS ────────────────────────

• Shift_JIS — the native encoding of PC-98 games and most retro Japanese

software

• EUC-JP — common on Unix-based Japanese systems

• JIS X 0201 — single-byte katakana, used natively on PC-88 and Sharp X1

(no escape sequences)

• UTF-8 — modern standard

• UTF-16 — BE and LE variants

── DISPLAY BASE ───────────────────────────────

Switch between hexadecimal, decimal, octal, and binary display for all

byte values — handy when cross-referencing assembly listings or hardware

documentation.

── TYPICAL USE CASES ──────────────────────────

• ROM hacking and fan translation of PC-98, PC-88, Sharp X1 games

• Identifying the encoding of an unknown text dump

• Building Shift_JIS search strings for hex editors

• Debugging text rendering issues in legacy Japanese software

• Learning how multi-byte encodings like Shift_JIS actually work at the

byte level

── PRIVACY ────────────────────────────────────

No data collection. No internet access. No accounts.

Everything runs locally on your device.

See the full privacy policy for details.

── THANKS ────────────────────────────────────

This app is inspired by JojoAGogogo's no longer available app.

I used it a lot while translating my first PC-98 game.

I missed it to much that I made my own, free like JojoAGogogo's one