Text Processing
Fullwidth to Halfwidth Converter
Convert fullwidth characters to halfwidth characters for proper text formatting
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Quick start
Call this tool from your code in three languages.
cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/fullwidth-to-halfwidth' \
-H 'Content-Type: application/json' \
-d '{"textInput":"Enter or paste your text with fullwidth characters here...\n\nExamples:\nＨｅｌｌｏ Ｗｏｒｌｄ！\n１２３４５６７８９０\nＡＢＣＤＥＦＧ\n！？，。；：\n（ ）［ ］｛ ｝","conversionMode":"all","preserveLineBreaks":true,"showStatistics":true,"outputFormat":"converted"}'API reference
Send a POST request with your inputs as JSON. File parameters require a separate upload first.
Endpoint
HTTP
POST https://api.elysiatools.com/en/api/tools/fullwidth-to-halfwidthParameters
| Name | Type | Required | Description |
|---|---|---|---|
| textInput | textarea | Yes | — |
| conversionMode | select | Yes | — |
| preserveLineBreaks | checkbox | No | Keep original line breaks and paragraph structure |
| showStatistics | checkbox | No | Display detailed statistics about the conversion process |
| outputFormat | select | Yes |
MCP integration
Add this tool to your Model Context Protocol server so AI agents can list and call it.
Server configuration
Add this block to your MCP client configuration:
mcp.json
{
"mcpServers": {
"elysiatools-fullwidth-to-halfwidth": {
"name": "fullwidth-to-halfwidth",
"description": "Convert fullwidth characters to halfwidth characters for proper text formatting",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=fullwidth-to-halfwidth",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}List available tools
After connecting to the SSE endpoint, list the exposed tools:
tools/list
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Call this tool
Invoke the tool by its id, passing arguments built from its parameters:
tools/call
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "fullwidth-to-halfwidth",
"arguments": {
"textInput": "Enter or paste your text with fullwidth characters here...\n\nExamples:\nＨｅｌｌｏ Ｗｏｒｌｄ！\n１２３４５６７８９０\nＡＢＣＤＥＦＧ\n！？，。；：\n（ ）［ ］｛ ｝",
"conversionMode": "all",
"preserveLineBreaks": true,
"showStatistics": true,
"outputFormat": "converted"
}
}
}Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).
Questions or issues? Contact [email protected]