{
  "title": "Base64 encoder decoder",
  "human_url": "https://happytails.ai/en/developer-tools/base64-encoder-decoder/",
  "agent_url": "https://happytails.ai/agents/en/developer-tools/base64-encoder-decoder/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/developer-tools/base64-encoder-decoder.md",
  "content": "Base64 encoder decoder\nEncode/decode tabs.\nUseful next steps\nImage to base64\nData-URI versus raw Base64 output.\nBase64 to image\nValidate data URI and actual image signature.\nJWT decoder\nDecode header/payload locally.\nHow to use Base64 encoder decoder\nEnter your text in the input field.\nThe result updates as you type. Adjust the available settings if needed.\nReview the result, then use Copy result or a download link when available.\nWorking with base64 encoder decoder\nFormatting makes existing data or code easier to read. Validation checks whether it follows a syntax or schema. Conversion maps it into another representation. Choosing the right operation helps avoid treating a neatly formatted result as proof that the underlying data is correct.\nCommon questions\nDoes valid JSON mean the data is correct?\nSyntax validation only establishes that the text can be parsed as JSON. A schema can check required fields and types, but neither proves that an email address, price or external record is factually correct.\nIs decoding the same as decrypting or verifying?\nNo. Base64 and URL encoding are representations, not encryption. Reading a token payload does not verify its signature. Use the specific validation or verification process required by the system receiving the result.\nContinue your workflow:\nImage to base64\n,\nBase64 to image\n,\nJWT decoder\n.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Image to base64 Data-URI versus raw Base64 output.",
      "url": "https://happytails.ai/en/image-tools/image-to-base64/"
    },
    {
      "name": "Base64 to image Validate data URI and actual image signature.",
      "url": "https://happytails.ai/en/image-tools/base64-to-image/"
    },
    {
      "name": "JWT decoder Decode header/payload locally.",
      "url": "https://happytails.ai/en/developer-tools/jwt-decoder/"
    }
  ],
  "tool": {
    "id": "base64-encoder-decoder",
    "category": "developer-tools",
    "built": true,
    "requirements": "Encode/decode tabs; UTF-8 and binary handling; Base64URL option and invalid-input errors.",
    "implementation": {
      "fields": [
        {
          "key": "direction",
          "label": "Direction",
          "value": "Encode",
          "type": "select",
          "values": [
            "Encode",
            "Decode"
          ]
        }
      ],
      "experience": {
        "automatic": true,
        "single": false,
        "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.",
        "action": null
      },
      "mode": "automatic",
      "interactive": false
    },
    "execution": "POST /api/v1/tools/base64-encoder-decoder/run",
    "api": {
      "id": "base64-encoder-decoder",
      "name": "Base64 encoder decoder",
      "category": "developer-tools",
      "description": "Encode/decode tabs.",
      "notes": "",
      "human_path": "/en/developer-tools/base64-encoder-decoder/",
      "method": "POST",
      "endpoint": "/api/v1/tools/base64-encoder-decoder/run",
      "schema_url": "/api/v1/tools/base64-encoder-decoder",
      "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": {
              "direction": {
                "type": "string",
                "description": "Direction",
                "default": "Encode",
                "enum": [
                  "Encode",
                  "Decode"
                ]
              }
            }
          }
        }
      },
      "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": "run_current_tool",
      "discovery": "WebMCP on the human page in a supporting browser",
      "verification": "See audit/API-AUDIT.md; availability is not verification"
    }
  },
  "markdown": "# Base64 encoder decoder\n\n- Human page: https://happytails.ai/en/developer-tools/base64-encoder-decoder/\n- Markdown: https://happytails.ai/en/developer-tools/base64-encoder-decoder.md\n- Structured JSON: https://happytails.ai/agents/en/developer-tools/base64-encoder-decoder/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `base64-encoder-decoder` |\n| Category | developer-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Automatic updates after valid input or file selection. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | /api/v1/tools/base64-encoder-decoder/run |\n| Browser-agent interface | run_current_tool |\n\n### Inputs and settings\n\nText input: Your text.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\nHello world!\n```\n\nChange the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.\n\n| Setting | Meaning | Control type | Default | Constraints |\n| --- | --- | --- | --- | --- |\n| `direction` | Direction | select | \"Encode\" | Allowed: Encode, Decode |\n\n### HTTP contract\n\nAPI calls process supplied data on the server. The website origin is `https://happytails.ai`. Server API hosting is not connected on the public website yet. Use your local server origin to test these requests.\n\n```http\nPOST https://happytails.ai/api/v1/tools/base64-encoder-decoder/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/base64-encoder-decoder.md) · [Shared API guide](https://happytails.ai/en/api.md)\n\n#### Limits\n\n| Limit | Value |\n| --- | --- |\n| request_bytes | 8388608 |\n| input_characters | 1000000 |\n| files_bytes | 5242880 |\n| max_files | 0 |\n| timeout_seconds | 12 |\n\n#### Complete input schema\n\n```json\n{\n  \"type\": \"object\",\n  \"additionalProperties\": false,\n  \"properties\": {\n    \"input\": {\n      \"type\": \"string\",\n      \"maxLength\": 1000000,\n      \"default\": \"\",\n      \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n    },\n    \"options\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"direction\": {\n          \"type\": \"string\",\n          \"description\": \"Direction\",\n          \"default\": \"Encode\",\n          \"enum\": [\n            \"Encode\",\n            \"Decode\"\n          ]\n        }\n      }\n    }\n  }\n}\n```\n\n#### Complete output schema\n\n```json\n{\n  \"type\": \"object\",\n  \"required\": [\n    \"tool\",\n    \"result\"\n  ],\n  \"properties\": {\n    \"tool\": {\n      \"type\": \"string\"\n    },\n    \"result\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"text\",\n        \"files\"\n      ],\n      \"properties\": {\n        \"text\": {\n          \"type\": [\n            \"string\",\n            \"null\"\n          ]\n        },\n        \"data\": {\n          \"description\": \"Parsed JSON when the textual result is JSON.\"\n        },\n        \"name\": {\n          \"type\": \"string\"\n        },\n        \"mime\": {\n          \"type\": \"string\"\n        },\n        \"files\": {\n          \"type\": \"array\",\n          \"items\": {\n            \"type\": \"object\",\n            \"required\": [\n              \"name\",\n              \"mime\",\n              \"bytes\",\n              \"base64\"\n            ],\n            \"properties\": {\n              \"name\": {\n                \"type\": \"string\"\n              },\n              \"mime\": {\n                \"type\": \"string\"\n              },\n              \"bytes\": {\n                \"type\": \"integer\"\n              },\n              \"base64\": {\n                \"type\": \"string\",\n                \"contentEncoding\": \"base64\"\n              }\n            }\n          }\n        }\n      }\n    }\n  }\n}\n```\n\n#### Error and retry handling\n\nFailures return a non-200 status and `error.code` plus `error.message`. Correct invalid input before retrying; retry server-busy responses with bounded backoff. Returned files contain Base64 data, not persistent download URLs. Decode and inspect the output before treating conversion as successful. See the shared API guide for the complete status and timeout rules.\n\n### Browser-agent workflow\n\n1. Open the human page in a browser that supports WebMCP.\n2. Discover the interface exposed by that page; use its actual schema.\n3. Select files on the page first when the tool requires files.\n4. Call `run_current_tool` with valid input and settings.\n5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.\n\nCalls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.\n\n### Planning specification\n\nEncode/decode tabs; UTF-8 and binary handling; Base64URL option and invalid-input errors.\n\nThis describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.\n\n### Complete machine-readable capability record\n\n```json\n{\n  \"id\": \"base64-encoder-decoder\",\n  \"category\": \"developer-tools\",\n  \"built\": true,\n  \"requirements\": \"Encode/decode tabs; UTF-8 and binary handling; Base64URL option and invalid-input errors.\",\n  \"implementation\": {\n    \"fields\": [\n      {\n        \"key\": \"direction\",\n        \"label\": \"Direction\",\n        \"value\": \"Encode\",\n        \"type\": \"select\",\n        \"values\": [\n          \"Encode\",\n          \"Decode\"\n        ]\n      }\n    ],\n    \"experience\": {\n      \"automatic\": true,\n      \"single\": false,\n      \"label\": \"Your text\",\n      \"placeholder\": \"Hello world!\",\n      \"help\": \"Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.\",\n      \"action\": null\n    },\n    \"mode\": \"automatic\",\n    \"interactive\": false\n  },\n  \"execution\": \"POST /api/v1/tools/base64-encoder-decoder/run\",\n  \"api\": {\n    \"id\": \"base64-encoder-decoder\",\n    \"name\": \"Base64 encoder decoder\",\n    \"category\": \"developer-tools\",\n    \"description\": \"Encode/decode tabs.\",\n    \"notes\": \"\",\n    \"human_path\": \"/en/developer-tools/base64-encoder-decoder/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/base64-encoder-decoder/run\",\n    \"schema_url\": \"/api/v1/tools/base64-encoder-decoder\",\n    \"input_schema\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"input\": {\n          \"type\": \"string\",\n          \"maxLength\": 1000000,\n          \"default\": \"\",\n          \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n        },\n        \"options\": {\n          \"type\": \"object\",\n          \"additionalProperties\": false,\n          \"properties\": {\n            \"direction\": {\n              \"type\": \"string\",\n              \"description\": \"Direction\",\n              \"default\": \"Encode\",\n              \"enum\": [\n                \"Encode\",\n                \"Decode\"\n              ]\n            }\n          }\n        }\n      }\n    },\n    \"output_schema\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"tool\",\n        \"result\"\n      ],\n      \"properties\": {\n        \"tool\": {\n          \"type\": \"string\"\n        },\n        \"result\": {\n          \"type\": \"object\",\n          \"required\": [\n            \"text\",\n            \"files\"\n          ],\n          \"properties\": {\n            \"text\": {\n              \"type\": [\n                \"string\",\n                \"null\"\n              ]\n            },\n            \"data\": {\n              \"description\": \"Parsed JSON when the textual result is JSON.\"\n            },\n            \"name\": {\n              \"type\": \"string\"\n            },\n            \"mime\": {\n              \"type\": \"string\"\n            },\n            \"files\": {\n              \"type\": \"array\",\n              \"items\": {\n                \"type\": \"object\",\n                \"required\": [\n                  \"name\",\n                  \"mime\",\n                  \"bytes\",\n                  \"base64\"\n                ],\n                \"properties\": {\n                  \"name\": {\n                    \"type\": \"string\"\n                  },\n                  \"mime\": {\n                    \"type\": \"string\"\n                  },\n                  \"bytes\": {\n                    \"type\": \"integer\"\n                  },\n                  \"base64\": {\n                    \"type\": \"string\",\n                    \"contentEncoding\": \"base64\"\n                  }\n                }\n              }\n            }\n          }\n        }\n      }\n    },\n    \"processing\": \"Server; same transformation code as browser tools\",\n    \"limits\": {\n      \"request_bytes\": 8388608,\n      \"input_characters\": 1000000,\n      \"files_bytes\": 5242880,\n      \"max_files\": 0,\n      \"timeout_seconds\": 12\n    }\n  },\n  \"agent_processing\": \"Server; same transformation code as browser tools\",\n  \"browser_agent\": {\n    \"supported\": true,\n    \"name\": \"run_current_tool\",\n    \"discovery\": \"WebMCP on the human page in a supporting browser\",\n    \"verification\": \"See audit/API-AUDIT.md; availability is not verification\"\n  }\n}\n```\n\n## Page guide\n\nEncode/decode tabs.\n\n## Useful next steps\n\n- [Image to base64](https://happytails.ai/en/image-tools/image-to-base64/): Data-URI versus raw Base64 output. ([Markdown](https://happytails.ai/en/image-tools/image-to-base64.md))\n\n- [Base64 to image](https://happytails.ai/en/image-tools/base64-to-image/): Validate data URI and actual image signature. ([Markdown](https://happytails.ai/en/image-tools/base64-to-image.md))\n\n- [JWT decoder](https://happytails.ai/en/developer-tools/jwt-decoder/): Decode header/payload locally. ([Markdown](https://happytails.ai/en/developer-tools/jwt-decoder.md))\n\n## How to use Base64 encoder decoder\n\n1. Enter your text in the input field.\n2. The result updates as you type. Adjust the available settings if needed.\n3. Review the result, then use Copy result or a download link when available.\n\n## Working with base64 encoder decoder\n\nFormatting makes existing data or code easier to read. Validation checks whether it follows a syntax or schema. Conversion maps it into another representation. Choosing the right operation helps avoid treating a neatly formatted result as proof that the underlying data is correct.\n\n## Common questions\n\n### Does valid JSON mean the data is correct?\n\nSyntax validation only establishes that the text can be parsed as JSON. A schema can check required fields and types, but neither proves that an email address, price or external record is factually correct.\n\n### Is decoding the same as decrypting or verifying?\n\nNo. Base64 and URL encoding are representations, not encryption. Reading a token payload does not verify its signature. Use the specific validation or verification process required by the system receiving the result.\n\nContinue your workflow: [Image to base64](https://happytails.ai/en/image-tools/image-to-base64/), [Base64 to image](https://happytails.ai/en/image-tools/base64-to-image/), [JWT decoder](https://happytails.ai/en/developer-tools/jwt-decoder/).\n"
}