Uppercase Converter

Open Uppercase Converter on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "uppercase",
  "category": "text-tools",
  "built": true,
  "requirements": "Locale-aware uppercasing; preserve layout and numbers; test accented letters and expanding mappings.",
  "implementation": {
    "fields": [],
    "experience": {
      "automatic": true,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Your text",
      "placeholder": "Hello world!",
      "help": "Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.",
      "helpParts": [
        "Change the input or settings to update your result.",
        "Results update as you type.",
        "Up to 1,000,000 characters."
      ],
      "action": null
    },
    "mode": "automatic",
    "interactive": false
  },
  "execution": "POST /api/v1/tools/uppercase/run",
  "api": {
    "id": "uppercase",
    "name": "Uppercase",
    "category": "text-tools",
    "description": "Convert text to UPPERCASE as you type.",
    "notes": "",
    "human_path": "/en/text-tools/uppercase/",
    "method": "POST",
    "endpoint": "/api/v1/tools/uppercase/run",
    "schema_url": "/api/v1/tools/uppercase",
    "input_schema": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "input": {
          "type": "string",
          "maxLength": 1000000,
          "default": "",
          "description": "Plain text input. File tools use files instead unless otherwise documented."
        },
        "options": {
          "type": "object",
          "additionalProperties": false,
          "properties": {}
        }
      }
    },
    "output_schema": {
      "type": "object",
      "required": [
        "tool",
        "result"
      ],
      "properties": {
        "tool": {
          "type": "string"
        },
        "result": {
          "type": "object",
          "required": [
            "text",
            "files"
          ],
          "properties": {
            "text": {
              "type": [
                "string",
                "null"
              ]
            },
            "data": {
              "description": "Parsed JSON when the textual result is JSON."
            },
            "name": {
              "type": "string"
            },
            "mime": {
              "type": "string"
            },
            "files": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "name",
                  "mime",
                  "bytes",
                  "base64"
                ],
                "properties": {
                  "name": {
                    "type": "string"
                  },
                  "mime": {
                    "type": "string"
                  },
                  "bytes": {
                    "type": "integer"
                  },
                  "base64": {
                    "type": "string",
                    "contentEncoding": "base64"
                  }
                }
              }
            }
          }
        }
      }
    },
    "processing": "Server; same transformation code as browser tools",
    "limits": {
      "request_bytes": 8388608,
      "input_characters": 1000000,
      "files_bytes": 5242880,
      "max_files": 0,
      "timeout_seconds": 12
    }
  },
  "agent_processing": "Server; same transformation code as browser tools",
  "browser_agent": {
    "supported": true,
    "name": "transform_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

Page guide

Convert text to UPPERCASE as you type.

Runs on your device

How to use Uppercase

Enter your text in the input field.
The result updates as you type. Adjust the available settings if needed.
Review the result, then use Copy result or a download link when available.

How to use this tool

Paste your text, choose a case and copy the result. The original input stays in place so you can try another format.

Letter case and identifiers

Letter case uses English locale rules. Identifier modes split spaces, punctuation and existing case boundaries, then join the words. Accented letters are preserved; punctuation is removed.

What to expect

Convert text to UPPERCASE as you type. Letters follow English locale casing. Numbers and punctuation stay in place. Some letters expand when capitalized, so the result can have a different character count.

Try a small example

Hello world