#Chinese Converter

Chinese Converter is a fully-local Chinese text converter supporting Simplified, Traditional (Taiwan / Hong Kong / OpenCC mode), and Japanese Shinjitai — any direction. It exposes two quick buttons (Trad→Simp, Simp→Trad), a Custom Language card for arbitrary pairs, a user-editable custom replacement rules, and batch file processing.

#Supported language codes

The tool uses 6 internal codes:

#Page layout

Two columns:

• Left: input area (upload + textarea) + two quick buttons + result card
• Right: Conversion Settings + Custom Language + Custom Replacement Rules panel

#Quick conversion (left column)

Two primary action buttons:

• Trad → Simp: from some Traditional form to Simplified
• Simp → Trad: from Simplified to some Traditional form

Which Traditional variant is used depends on the Convert Regional Terms toggle on the right:

#Custom Language (right column)

For other combinations (tw↔hk, t↔jp, etc.):

1. Pick the Source Language from the dropdown
2. Pick the Target Language from the dropdown
3. Click Custom Convert

⚠️ Note: when a custom pair doesn't touch Simplified (e.g. tw↔hk), the custom replacement rules doesn't apply. If you have rules defined, the tool shows a "rules inactive" hint.

#Conversion Settings (right column)

Four toggles:

• Convert Regional Terms: controls the Traditional variant used by quick buttons (see table above). The Custom Language card is unaffected.
• Smart Line Break: re-merge wrap-broken lines based on Chinese end-of-sentence punctuation (OCR cleanup helper)
• Single File Mode: process one file at a time; uploading a new file replaces the current one
• Auto Export After Conversion: skip the preview and directly download the result — useful for batch runs

#Custom Replacement Rules

The tool's power feature — a user-editable list of terms that should NOT be converted.

#How it works

• s2t rules: applied during Simp→Trad (from is Simplified word, to is the Traditional form to preserve)
• t2s rules: applied during Trad→Simp
• The two rule sets are stored and managed independently

#When it's applied

The custom replacement rules only applies when one side is Simplified:

• ✅ cn → tw/twp/hk/t/jp → applies s2t rules
• ✅ tw/twp/hk/t/jp → cn → applies t2s rules
• ❌ tw ↔ hk, t ↔ jp and other pure-Traditional pairs → dictionary skipped
• ❌ When the master toggle is off → no rules applied

#Managing rules

Click "Manage Rules" on the Custom Replacement Rules panel (bottom-right) to open the drawer:

• Switch between s2t / t2s direction tabs
• Add, edit, delete individual rules (from → to)
• Batch import / export (the dictionary is shared with the Novel Processor tool)

#Typical use cases

• Force the Simplified "机器人" (robot — a common tech term where the Simplified character is preferred) to stay as "机器人" during Simp→Trad instead of becoming "機器人"
• Preserve Simplified forms of brand names regardless of conversion direction
• Add Traditional-form proper names to t2s rules to prevent incorrect simplification

#File upload

• Drag-and-drop or click; supports .txt, .csv, .json, .md and other rich-text formats
• Multi-file by default — drop a batch and process them all at once
• In multi-file mode the textarea is hidden; each file exports under its original name

#Result card

After single-file conversion, the result card appears with:

• Copy: one-click clipboard
• Export: download under the original filename (or jianfan.txt)
• Edit in place: modify the result text directly

With "Auto Export" enabled, the preview is skipped and the result downloads immediately.

#Use cases

• Document localization: sync content across Mainland / Taiwan / Hong Kong audiences
• OCR cleanup: pair with Smart Line Break to repair scanned text
• Academic / classical texts: use the custom replacement rules to preserve proper names and technical terms
• Content creation: publish blogs and novels in both Simplified and Traditional versions
• Batch data: process .json / .csv / multiple TXT files containing Chinese fields

#Why local-only?

Built on js-opencc (a JavaScript port of OpenCC) with dictionaries synced from upstream. Runs entirely in your browser — files never leave your machine, safe for sensitive material.