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One Million Tools

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io.github.lucas-project/one-million-toolsv0.1.0

42 free deterministic utilities: JSON, CSV, YAML, encoding, hashing, JWT, cron, formatters, CSS.

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base64_decode

Base64 string → UTF-8 text.

inputstring, required

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One Million Tools MCP server | mcptry

Tools (42)

base64_decode

Base64 string → UTF-8 text.

Argument	Type	Description
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    }
  }
}

base64_encode

UTF-8 text → Base64 string.

Argument	Type	Description
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    }
  }
}

color_convert

Convert a HEX color into RGB / HSL / HSV / CSS forms.

Argument	Type	Description
hex*	string	HEX color, with or without leading #.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "hex"
  ],
  "properties": {
    "hex": {
      "type": "string",
      "description": "HEX color, with or without leading #."
    }
  }
}

cron_explain

Explain a cron expression in plain English.

Argument	Type	Description
expression*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "expression"
  ],
  "properties": {
    "expression": {
      "type": "string"
    }
  }
}

css_border_radius_build

Build a CSS border-radius value from four corner radii in px.

Argument	Type	Description
bl	number
br	number
tl	number
tr	number

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "bl": {
      "type": "number",
      "default": 0
    },
    "br": {
      "type": "number",
      "default": 0
    },
    "tl": {
      "type": "number",
      "default": 0
    },
    "tr": {
      "type": "number",
      "default": 0
    }
  }
}

css_box_shadow_build

Build a CSS box-shadow value from one or more layers.

Argument	Type	Description
layers*	array

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "layers"
  ],
  "properties": {
    "layers": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "blur": {
            "type": "number",
            "default": 4
          },
          "color": {
            "type": "string",
            "default": "#000000"
          },
          "inset": {
            "type": "boolean",
            "default": false
          },
          "spread": {
            "type": "number",
            "default": 0
          },
          "offsetX": {
            "type": "number",
            "default": 0
          },
          "offsetY": {
            "type": "number",
            "default": 2
          },
          "opacity": {
            "type": "number",
            "default": 0.1,
            "maximum": 1,
            "minimum": 0
          }
        }
      },
      "minItems": 1
    }
  }
}

css_contrast_check

Compute the WCAG contrast ratio between two colors and the AA/AAA verdict.

Argument	Type	Description
background*	string
foreground*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "foreground",
    "background"
  ],
  "properties": {
    "background": {
      "type": "string"
    },
    "foreground": {
      "type": "string"
    }
  }
}

css_format

Pretty-print CSS.

Argument	Type	Description
input*	string
indent	string
printWidth	integer

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    },
    "indent": {
      "enum": [
        "2",
        "4"
      ],
      "type": "string",
      "default": "2"
    },
    "printWidth": {
      "type": "integer",
      "default": 80,
      "maximum": 200,
      "minimum": 20
    }
  }
}

css_gradient_build

Build a CSS linear-gradient string from color stops + angle.

Argument	Type	Description
angle	number	Degrees; 0 = top-to-bottom.
stops*	array

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "stops"
  ],
  "properties": {
    "angle": {
      "type": "number",
      "default": 90,
      "description": "Degrees; 0 = top-to-bottom."
    },
    "stops": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "color",
          "position"
        ],
        "properties": {
          "color": {
            "type": "string"
          },
          "position": {
            "type": "number",
            "maximum": 100,
            "minimum": 0
          }
        }
      },
      "minItems": 2
    }
  }
}

csv_filter

Filter CSV rows by a column predicate (equals / contains / regex / gt / gte / lt / lte / not-empty).

Argument	Type	Description
mode	string
input*	string
value	string
column*	string
caseSensitive	boolean

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input",
    "column"
  ],
  "properties": {
    "mode": {
      "enum": [
        "equals",
        "contains",
        "regex",
        "gt",
        "gte",
        "lt",
        "lte",
        "not-empty"
      ],
      "type": "string",
      "default": "equals"
    },
    "input": {
      "type": "string"
    },
    "value": {
      "type": "string",
      "default": ""
    },
    "column": {
      "type": "string"
    },
    "caseSensitive": {
      "type": "boolean",
      "default": false
    }
  }
}

csv_parse

Parse CSV text into fields + preview rows with delimiter detection.

Argument	Type	Description
input*	string
delimiter	string
previewRows	integer

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    },
    "delimiter": {
      "enum": [
        "auto",
        ",",
        ";",
        "\t",
        "|"
      ],
      "type": "string",
      "default": "auto"
    },
    "previewRows": {
      "type": "integer",
      "default": 50,
      "maximum": 500,
      "minimum": 1
    }
  }
}

csv_sort

Sort CSV rows by one column (alpha or numeric).

Argument	Type	Description
mode	string
input*	string
column*	string
delimiter	string
direction	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input",
    "column"
  ],
  "properties": {
    "mode": {
      "enum": [
        "alpha",
        "numeric"
      ],
      "type": "string",
      "default": "alpha"
    },
    "input": {
      "type": "string"
    },
    "column": {
      "type": "string"
    },
    "delimiter": {
      "type": "string"
    },
    "direction": {
      "enum": [
        "asc",
        "desc"
      ],
      "type": "string",
      "default": "asc"
    }
  }
}

csv_split

Split a CSV into N chunks or into files of N rows each.

Argument	Type	Description
mode	string
input*	string
chunks	integer	Used when mode=byChunks.
rowsPerChunk	integer	Used when mode=byRows.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "mode": {
      "enum": [
        "byChunks",
        "byRows"
      ],
      "type": "string",
      "default": "byChunks"
    },
    "input": {
      "type": "string"
    },
    "chunks": {
      "type": "integer",
      "default": 2,
      "maximum": 9007199254740991,
      "minimum": 1,
      "description": "Used when mode=byChunks."
    },
    "rowsPerChunk": {
      "type": "integer",
      "default": 100,
      "maximum": 9007199254740991,
      "minimum": 1,
      "description": "Used when mode=byRows."
    }
  }
}

csv_statistics

Compute per-column summary statistics (count, min, max, mean, median) over a CSV.

Argument	Type	Description
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    }
  }
}

csv_to_json

Parse CSV text into a JSON array of objects.

Argument	Type	Description
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    }
  }
}

env_redact

Redact secrets (API keys, tokens, passwords) from logs / config / env text.

Argument	Type	Description
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    }
  }
}

hash_text

Compute a SHA-1 / SHA-256 / SHA-512 hex digest of UTF-8 text.

Argument	Type	Description
input*	string
algorithm	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    },
    "algorithm": {
      "enum": [
        "SHA-1",
        "SHA-256",
        "SHA-512"
      ],
      "type": "string",
      "default": "SHA-256"
    }
  }
}

html_format

Pretty-print HTML.

Argument	Type	Description
input*	string
indent	string
printWidth	integer

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    },
    "indent": {
      "enum": [
        "2",
        "4"
      ],
      "type": "string",
      "default": "2"
    },
    "printWidth": {
      "type": "integer",
      "default": 80,
      "maximum": 200,
      "minimum": 20
    }
  }
}

js_format

Pretty-print JavaScript / TypeScript with Prettier.

Argument	Type	Description
semi	boolean
input*	string
indent	string
parser	string
printWidth	integer
singleQuote	boolean

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "semi": {
      "type": "boolean",
      "default": true
    },
    "input": {
      "type": "string"
    },
    "indent": {
      "enum": [
        "2",
        "4"
      ],
      "type": "string",
      "default": "2"
    },
    "parser": {
      "enum": [
        "babel",
        "babel-ts",
        "typescript"
      ],
      "type": "string",
      "default": "babel"
    },
    "printWidth": {
      "type": "integer",
      "default": 80,
      "maximum": 200,
      "minimum": 20
    },
    "singleQuote": {
      "type": "boolean",
      "default": false
    }
  }
}

json_diff

Diff two JSON documents and return added/removed/changed keys.

Argument	Type	Description
left*	string
right*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "left",
    "right"
  ],
  "properties": {
    "left": {
      "type": "string"
    },
    "right": {
      "type": "string"
    }
  }
}

json_format

Pretty-print JSON with configurable indentation (2 spaces, 4 spaces, or tab).

Argument	Type	Description
input*	string	Raw JSON text to format.
indent	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string",
      "description": "Raw JSON text to format."
    },
    "indent": {
      "enum": [
        "2",
        "4",
        "tab"
      ],
      "type": "string",
      "default": "2"
    }
  }
}

json_minify

Compress JSON by stripping whitespace.

Argument	Type	Description
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    }
  }
}

json_to_csv

Convert an array of JSON objects to CSV.

Argument	Type	Description
input*	string	JSON array of flat objects.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string",
      "description": "JSON array of flat objects."
    }
  }
}

json_to_yaml

Convert JSON to YAML.

Argument	Type	Description
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    }
  }
}

json_validate

Validate JSON syntax and return the parsed value or a line/column error.

Argument	Type	Description
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    }
  }
}

jwt_decode

Decode a JWT header + payload. Does not verify the signature.

Argument	Type	Description
token*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "token"
  ],
  "properties": {
    "token": {
      "type": "string"
    }
  }
}

markdown_format

Normalize Markdown (list markers, trailing whitespace, blank lines).

Argument	Type	Description
input*	string
listMarker	string
trimTrailing	boolean
collapseBlankLines	boolean

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    },
    "listMarker": {
      "enum": [
        "-",
        "*",
        "+"
      ],
      "type": "string",
      "default": "-"
    },
    "trimTrailing": {
      "type": "boolean",
      "default": true
    },
    "collapseBlankLines": {
      "type": "boolean",
      "default": true
    }
  }
}

markdown_preview

Render Markdown to an HTML preview fragment with word/char counts.

Argument	Type	Description
gfm	boolean
input*	string
breaks	boolean

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "gfm": {
      "type": "boolean",
      "default": true
    },
    "input": {
      "type": "string"
    },
    "breaks": {
      "type": "boolean",
      "default": false
    }
  }
}

markdown_to_html

Convert Markdown to HTML.

Argument	Type	Description
gfm	boolean
input*	string
breaks	boolean

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "gfm": {
      "type": "boolean",
      "default": true
    },
    "input": {
      "type": "string"
    },
    "breaks": {
      "type": "boolean",
      "default": false
    }
  }
}

meta_tags_generate

Generate <title>, description, Open Graph and Twitter Card tags for a page.

Argument	Type	Description
url	string
type	string
title*	string
author	string
locale	string
imageUrl	string
siteName	string
canonical	string
description*	string
twitterHandle	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "title",
    "description"
  ],
  "properties": {
    "url": {
      "type": "string",
      "default": ""
    },
    "type": {
      "enum": [
        "website",
        "article",
        "product"
      ],
      "type": "string",
      "default": "website"
    },
    "title": {
      "type": "string"
    },
    "author": {
      "type": "string",
      "default": ""
    },
    "locale": {
      "type": "string",
      "default": "en_US"
    },
    "imageUrl": {
      "type": "string",
      "default": ""
    },
    "siteName": {
      "type": "string",
      "default": ""
    },
    "canonical": {
      "type": "string",
      "default": ""
    },
    "description": {
      "type": "string"
    },
    "twitterHandle": {
      "type": "string",
      "default": ""
    }
  }
}

og_preview_build

Build an Open Graph preview metadata bundle (title / description / domain truncation).

Argument	Type	Description
url	string
title*	string
imageUrl	string
siteName	string
description*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "title",
    "description"
  ],
  "properties": {
    "url": {
      "type": "string",
      "default": ""
    },
    "title": {
      "type": "string"
    },
    "imageUrl": {
      "type": "string",
      "default": ""
    },
    "siteName": {
      "type": "string",
      "default": ""
    },
    "description": {
      "type": "string"
    }
  }
}

regex_test

Test a regular expression against input text and return matches with capture groups.

Argument	Type	Description
flags	string	Flags, e.g. 'gi'.
input*	string
pattern*	string	Regex source, no surrounding slashes.
replacement	string	Optional replacement for String.replace.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "pattern",
    "input"
  ],
  "properties": {
    "flags": {
      "type": "string",
      "default": "",
      "description": "Flags, e.g. 'gi'."
    },
    "input": {
      "type": "string"
    },
    "pattern": {
      "type": "string",
      "description": "Regex source, no surrounding slashes."
    },
    "replacement": {
      "type": "string",
      "description": "Optional replacement for String.replace."
    }
  }
}

sha256_hash

Compute a SHA-256 hex digest of UTF-8 text.

Argument	Type	Description
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    }
  }
}

slug_generate

Generate a URL slug from a string.

Argument	Type	Description
input*	string
lowercase	boolean
maxLength	integer	0 = no limit.
separator	string
stripAccents	boolean
collapseRepeats	boolean

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    },
    "lowercase": {
      "type": "boolean",
      "default": true
    },
    "maxLength": {
      "type": "integer",
      "default": 0,
      "maximum": 9007199254740991,
      "minimum": 0,
      "description": "0 = no limit."
    },
    "separator": {
      "enum": [
        "-",
        "_"
      ],
      "type": "string",
      "default": "-"
    },
    "stripAccents": {
      "type": "boolean",
      "default": true
    },
    "collapseRepeats": {
      "type": "boolean",
      "default": true
    }
  }
}

sql_format

Pretty-print SQL.

Argument	Type	Description
input*	string
indent	string
dialect	string
keywordCase	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    },
    "indent": {
      "enum": [
        "2",
        "4"
      ],
      "type": "string",
      "default": "2"
    },
    "dialect": {
      "enum": [
        "sql",
        "postgresql",
        "mysql",
        "sqlite",
        "bigquery",
        "tsql",
        "mariadb",
        "plsql",
        "db2",
        "redshift",
        "snowflake"
      ],
      "type": "string",
      "default": "sql"
    },
    "keywordCase": {
      "enum": [
        "upper",
        "lower",
        "preserve"
      ],
      "type": "string",
      "default": "upper"
    }
  }
}

text_diff

Diff two texts and return part-level changes plus a unified string.

Argument	Type	Description
left*	string
mode	string
right*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "left",
    "right"
  ],
  "properties": {
    "left": {
      "type": "string"
    },
    "mode": {
      "enum": [
        "lines",
        "words"
      ],
      "type": "string",
      "default": "words"
    },
    "right": {
      "type": "string"
    }
  }
}

unix_timestamp_convert

Convert a Unix timestamp (seconds or ms) to an ISO 8601 date string.

Argument	Type	Description
unit	string
zone	string
input*	string	Numeric Unix timestamp as a string.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "unit": {
      "enum": [
        "seconds",
        "milliseconds"
      ],
      "type": "string",
      "default": "seconds"
    },
    "zone": {
      "enum": [
        "local",
        "utc"
      ],
      "type": "string",
      "default": "utc"
    },
    "input": {
      "type": "string",
      "description": "Numeric Unix timestamp as a string."
    }
  }
}

url_decode

Decode percent-encoded URL text.

Argument	Type	Description
mode	string
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "mode": {
      "enum": [
        "component",
        "uri"
      ],
      "type": "string",
      "default": "component"
    },
    "input": {
      "type": "string"
    }
  }
}

url_encode

Percent-encode a string (component or full URI mode).

Argument	Type	Description
mode	string
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "mode": {
      "enum": [
        "component",
        "uri"
      ],
      "type": "string",
      "default": "component"
    },
    "input": {
      "type": "string"
    }
  }
}

uuid_generate

Generate RFC 4122 v4 UUIDs.

Argument	Type	Description
count	integer

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "count": {
      "type": "integer",
      "default": 1,
      "maximum": 64,
      "minimum": 1
    }
  }
}

yaml_format

Pretty-print YAML.

Argument	Type	Description
input*	string
indent	string
sortKeys	boolean
lineWidth	integer

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    },
    "indent": {
      "enum": [
        "2",
        "4"
      ],
      "type": "string",
      "default": "2"
    },
    "sortKeys": {
      "type": "boolean",
      "default": false
    },
    "lineWidth": {
      "type": "integer",
      "default": 80,
      "maximum": 200,
      "minimum": 20
    }
  }
}

yaml_to_json

Convert YAML to pretty-printed JSON.

Argument	Type	Description
input*	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string"
    }
  }
}