Development
Regex Replace Previewer
Preview regex replacements in real-time with detailed diff highlights and statistics
json· JSON resultOpen tool
Quick start
Call this tool from your code in three languages.
cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/regex-replace-previewer' \
-H 'Content-Type: application/json' \
-d '{"textInput":"Enter the text you want to process...","pattern":"e.g., \\b(\\d{4})-(\\d{2})-(\\d{2})\\b","replacement":"e.g., $2/$3/$1","flags":"g","previewMode":"side-by-side"}'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/regex-replace-previewerParameters
| Name | Type | Required | Description |
|---|---|---|---|
| textInput | textarea | Yes | — |
| pattern | text | Yes | Enter the regular expression pattern to search for |
| replacement | text | Yes | Use $1, $2, ${name} for capture groups. Special: $& (match), $` (prefix), $' (suffix), $$ (literal $) |
| flags | text | No | Regex flags: g (global), i (case-insensitive), m (multiline), etc. |
| previewMode | select | No |
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-regex-replace-previewer": {
"name": "regex-replace-previewer",
"description": "Preview regex replacements in real-time with detailed diff highlights and statistics",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=regex-replace-previewer",
"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": "regex-replace-previewer",
"arguments": {
"textInput": "Enter the text you want to process...",
"pattern": "e.g., \\b(\\d{4})-(\\d{2})-(\\d{2})\\b",
"replacement": "e.g., $2/$3/$1",
"flags": "g",
"previewMode": "side-by-side"
}
}
}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]