{
  "title": "Duplicate file finder",
  "human_url": "https://happytails.ai/en/developer-tools/duplicate-file-finder/",
  "agent_url": "https://happytails.ai/agents/en/developer-tools/duplicate-file-finder/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/developer-tools/duplicate-file-finder.md",
  "content": "Duplicate file finder\nFind byte-identical files by size, SHA-256 and a final direct byte comparison.\nHow can we improve this tool?\nReport a problem or share an idea.\nPlease leave out private information. Your message and the tool name go to our team via PostHog.\nHow to use Duplicate file finder\nChoose the folder you want to inspect.\nReview the options and run the check.\nRead the result and download the report.\nUseful next steps\nFilename portability checker\nLong path checker\nFile hash\nChoose one local folder\nUse the folder picker and confirm the files you want to inspect. Nested paths are preserved. Choosing another folder replaces the selection.\nReview the result\nFind byte-identical files by size, SHA-256 and a final direct byte comparison.\nDownload your report\nSave the report or manifest to keep the results. Your source files are unchanged, and the processing stays in your browser.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Filename portability checker",
      "url": "https://happytails.ai/en/developer-tools/filename-portability-checker/"
    },
    {
      "name": "Long path checker",
      "url": "https://happytails.ai/en/developer-tools/long-path-checker/"
    },
    {
      "name": "File hash",
      "url": "https://happytails.ai/en/developer-tools/file-hash/"
    }
  ],
  "tool": {
    "id": "duplicate-file-finder",
    "category": "developer-tools",
    "built": true,
    "requirements": "Up to 2,000 files, 512 MiB total and 256 MiB per file. Matching hashes are checked with a direct byte comparison. Very large comparison workloads are bounded and may require a smaller folder. Nothing is deleted.",
    "implementation": {
      "fields": [],
      "files": true,
      "input": false,
      "directory": true,
      "multiple": true,
      "deferImagePreview": true,
      "presentation": "metrics",
      "maxFileBytes": 536870912,
      "uploadHelp": "Choose one folder, up to 2,000 files and 512 MiB total; 256 MiB per file.",
      "note": "Files are read locally in bounded chunks and never changed. Only selected files are inspected. Cancel at any time.",
      "experience": {
        "automatic": false,
        "single": false,
        "inputMaxLength": 1000000,
        "inputMode": "text",
        "label": "Your text",
        "placeholder": "Type or paste your input…",
        "help": "Up to 1,000,000 characters. Review the settings before running.",
        "action": null
      },
      "mode": "explicit",
      "interactive": false
    },
    "execution": "Browser interface",
    "api": null,
    "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": "# Duplicate file finder\n\n- Human page: https://happytails.ai/en/developer-tools/duplicate-file-finder/\n- Markdown: https://happytails.ai/en/developer-tools/duplicate-file-finder.md\n- Structured JSON: https://happytails.ai/agents/en/developer-tools/duplicate-file-finder/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `duplicate-file-finder` |\n| Category | developer-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Use the visible action or interactive controls. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | Not callable through HTTP. |\n| Browser-agent interface | run_current_tool |\n\n### Implementation notes\n\nFiles are read locally in bounded chunks and never changed. Only selected files are inspected. Cancel at any time.\n\n### Inputs and settings\n\nNo free-text input is required. Use the file inputs and/or settings below.\n\nAccepted browser files: `See implementation notes`. Multiple files are supported.\n\nBrowser file-input limit: 536870912 bytes in total. HTTP limits can differ.\n\nNo additional settings are declared for this tool.\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\nUp to 2,000 files, 512 MiB total and 256 MiB per file. Matching hashes are checked with a direct byte comparison. Very large comparison workloads are bounded and may require a smaller folder. Nothing is deleted.\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\": \"duplicate-file-finder\",\n  \"category\": \"developer-tools\",\n  \"built\": true,\n  \"requirements\": \"Up to 2,000 files, 512 MiB total and 256 MiB per file. Matching hashes are checked with a direct byte comparison. Very large comparison workloads are bounded and may require a smaller folder. Nothing is deleted.\",\n  \"implementation\": {\n    \"fields\": [],\n    \"files\": true,\n    \"input\": false,\n    \"directory\": true,\n    \"multiple\": true,\n    \"deferImagePreview\": true,\n    \"presentation\": \"metrics\",\n    \"maxFileBytes\": 536870912,\n    \"uploadHelp\": \"Choose one folder, up to 2,000 files and 512 MiB total; 256 MiB per file.\",\n    \"note\": \"Files are read locally in bounded chunks and never changed. Only selected files are inspected. Cancel at any time.\",\n    \"experience\": {\n      \"automatic\": false,\n      \"single\": false,\n      \"inputMaxLength\": 1000000,\n      \"inputMode\": \"text\",\n      \"label\": \"Your text\",\n      \"placeholder\": \"Type or paste your input…\",\n      \"help\": \"Up to 1,000,000 characters. Review the settings before running.\",\n      \"action\": null\n    },\n    \"mode\": \"explicit\",\n    \"interactive\": false\n  },\n  \"execution\": \"Browser interface\",\n  \"api\": null,\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\nFind byte-identical files by size, SHA-256 and a final direct byte comparison.\n\nHow can we improve this tool?\n\nReport a problem or share an idea.\n\nPlease leave out private information. Your message and the tool name go to our team via PostHog.\n\n### How to use Duplicate file finder\n\n1. Choose the folder you want to inspect.\n2. Review the options and run the check.\n3. Read the result and download the report.\n\n## Useful next steps\n\n- [Filename portability checker](https://happytails.ai/en/developer-tools/filename-portability-checker/) ([Markdown](https://happytails.ai/en/developer-tools/filename-portability-checker.md))\n\n- [Long path checker](https://happytails.ai/en/developer-tools/long-path-checker/) ([Markdown](https://happytails.ai/en/developer-tools/long-path-checker.md))\n\n- [File hash](https://happytails.ai/en/developer-tools/file-hash/) ([Markdown](https://happytails.ai/en/developer-tools/file-hash.md))\n\n## Choose one local folder\n\nUse the folder picker and confirm the files you want to inspect. Nested paths are preserved. Choosing another folder replaces the selection.\n\n### Review the result\n\nFind byte-identical files by size, SHA-256 and a final direct byte comparison.\n\n### Download your report\n\nSave the report or manifest to keep the results. Your source files are unchanged, and the processing stays in your browser.\n"
}