Felo

Simple Kanji Character Substitution Tool Online

Replace a fixed set of Kanji/Hanzi characters with bracketed component strings using an exact 12-pair mapping, and reverse it when you need the original character back. Every response shows the full mapping table and a worked example, so you always know which characters are supported. Try it online.

What is Simple Kanji Character Substitution Tool Online?

It is a text tool that swaps a small, fixed set of Kanji/Hanzi characters for bracketed strings showing their visible component parts. For example, 品 becomes [口口口] and 好 becomes [一了女]. It also runs the other way: paste a bracketed component string and get the original character back.

This is character substitution, not translation. It does not turn English sentences into Japanese, and it does not know thousands of characters. It knows exactly twelve, and it tells you which twelve every time.

Key Features

Exact twelve-pair mapping. 了→[了], 子→[一了], 女→[女], 好→[一了女], 姦→[女女女], 口→[口], 品→[口口口], 言→[一三口], 下→[下], 不→[下一], 否→[下一口], 古→[十口].
Reverse mode. Give a bracketed string such as [一了女] and get 好 back.
Pass-through safety. Characters outside the map are preserved exactly as typed, including spaces, punctuation and emoji.
Published mapping table. Each response includes the full table so you can check the result yourself.
Worked examples. You see a before/after pair, not just an unexplained output block.

How to Use

Paste or type your text and say what you want. For example: "Substitute this: 女子好品". If you say nothing else, the tool assumes forward direction (character to bracketed components).
Read the converted text in its own copyable code block, with the mapping table underneath so you can verify each swap.
Ask for the reverse if you need it: "Reverse this: [一了女][口口口]". You can also ask for a specific character's mapping, or for a list of everything supported.

Example Use Cases

Checking a component breakdown. You see 姦 in a text and want to know it is written as three 女: ask for the substitution of 姦 and get [女女女].
Building a puzzle or worksheet. You want a set of bracketed component strings for a classroom activity on Kanji structure; paste your characters and get consistent bracketed output you can copy into the worksheet.
Decoding a bracketed string you found. Someone sent you [下一口] and you want the original character; the reverse mode returns 否.

Tips for Best Results

Say "reverse" explicitly when you paste bracketed strings, otherwise the tool treats your input as forward text.
Keep expectations matched to the map: if a character is not one of the twelve, it comes back unchanged, and the tool will tell you so rather than inventing a breakdown.
Ask for the mapping table alone if you just want a reference list.

FAQ

What input format does it accept?
Plain text in the chat box. There is no file upload and no length limit enforced by the tool itself, though very long pastes are handled in one pass and may be trimmed only if you ask. Bracketed strings are accepted for reverse mode.

How accurate is the result?
It is exact for the twelve mapped characters, because the substitution is applied by a deterministic script against a literal table, not guessed. Anything outside the table is passed through unchanged and flagged. It is not a translation and will not produce Japanese sentences.

How does this compare with the original source page?
Some free text tools offer a two-box interface with a Send button and no explanation of the mapping. This tool delivers the same kind of substitution as copyable text in chat, publishes the complete twelve-pair table, states the direction, adds a reverse mode, and reports unmapped characters instead of leaving you to guess.

Can it handle other Kanji?
No. Only the twelve characters above are supported. Requests for others return the character unchanged with a note.