Integer base convert

integer-base-convert · version 1.0.0 · Numbers & math · free, no key needed

Convert a signed integer string between bases 2 and 36 using BigInt.

Use when you need to: integer base convert · convert integer base · base convert integer.

Supported

• integer base convert
• convert integer base
• base convert integer

Not supported

• floats
• base 1
• base 64
• leading zeros output

Behavior

• from_base and to_base are JSON integers in 2..36.
• value is an optional ASCII minus then digits of from_base. Digits 0-9 then a-z or A-Z. Empty, plus, and spaces are rejected.
• Leading zeros are rejected except for zero itself. -0 is rejected. Digit characters must be in range for from_base.
• Output is canonical in to_base: no plus, no leading zeros, lowercase digits, minus only if negative, and 0 is "0".
• At most 256 significant digits in the source excluding the sign. Computation uses BigInt. JSON BigInt is never returned.

Input

• value (string, required): min length 1; max length 257
• from_base (integer, required): min 2; max 36
• to_base (integer, required): min 2; max 36

Output

• canonical (string, required)

Limits

• max integer digits: 256
• min base: 2
• max base: 36

Example

Request input:

{
  "value": "FF",
  "from_base": 16,
  "to_base": 10
}

Response:

{
  "result": {
    "canonical": "255"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "integer-base-convert",
  "version": "1.0.0",
  "input": {
    "value": "FF",
    "from_base": 16,
    "to_base": 10
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/integer-base-convert/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"value":"FF","from_base":16,"to_base":10}'

The machine-readable contract is at /v1/tools/integer-base-convert/versions/1.0.0.

CLI

node cli.mjs run integer-base-convert 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• Integer digit sum: Sum the base-b digits of the magnitude of an integer string.
• Integer digital root: Repeatedly sum the base-b digits of the magnitude of an integer string until a single digit remains.
• Angle DMS convert: Convert a signed integer angle between degrees, arcminutes, and arcseconds as an exact rational.
• Array integer adjacent diff: Replace an array of canonical integer strings with consecutive first differences.
• Array integer clamp: Clamp an array of canonical integer strings to optional inclusive min and max bounds.
• Array integer cumulative sum: Replace an array of canonical integer strings with equal-length prefix sums.