Math & Numbers

Base-N Radix Converter

Convert numbers and text between any radix from 2 to 36, with custom alphabets and presets for Base58, Base62, and Crockford Base32.

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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/base-n-radix-converter' \
  -H 'Content-Type: application/json' \
  -d '{"input":"FF","fromBase":16,"toBase":10,"preset":"none","customAlphabet":"e.g. ABCDEFGHJKMNPQRSTVWXYZ (unique chars; length = base)"}'

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/base-n-radix-converter

Parameters

Name	Type	Required	Description
input	text	Yes	—
fromBase	number	No	—
toBase	number	No	—
preset	select	No	—
customAlphabet	text	No	—

Response format

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-base-n-radix-converter": {
      "name": "base-n-radix-converter",
      "description": "Convert numbers and text between any radix from 2 to 36, with custom alphabets and presets for Base58, Base62, and Crockford Base32.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=base-n-radix-converter",
      "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": "base-n-radix-converter",
    "arguments": {
  "input": "FF",
  "fromBase": 16,
  "toBase": 10,
  "preset": "none",
  "customAlphabet": "e.g. ABCDEFGHJKMNPQRSTVWXYZ (unique chars; length = base)"
}
  }
}

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]

Browse tools Open tool

curl -X POST 'https://api.elysiatools.com/en/api/tools/base-n-radix-converter' \ -H 'Content-Type: application/json' \ -d '{"input":"FF","fromBase":16,"toBase":10,"preset":"none","customAlphabet":"e.g. ABCDEFGHJKMNPQRSTVWXYZ (unique chars; length = base)"}'

Name

Type

Required

Description

input

text

Yes

—

fromBase

number

—

toBase

number

—

preset

select

—

customAlphabet

text

—

{ "mcpServers": { "elysiatools-base-n-radix-converter": { "name": "base-n-radix-converter", "description": "Convert numbers and text between any radix from 2 to 36, with custom alphabets and presets for Base58, Base62, and Crockford Base32.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=base-n-radix-converter", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "base-n-radix-converter", "arguments": { "input": "FF", "fromBase": 16, "toBase": 10, "preset": "none", "customAlphabet": "e.g. ABCDEFGHJKMNPQRSTVWXYZ (unique chars; length = base)" } } }