happytails.ai

Unicode filename collision checker

Open Unicode filename collision checker 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": "unicode-filename-collision-checker",
  "category": "developer-tools",
  "built": true,
  "requirements": "Up to 2,000 files. Uses Unicode 17 default full case folding and browser NFC/NFD normalization. Locale-specific Turkish mappings are not applied. Potential equivalence is not proof of a collision on every operating system.",
  "implementation": {
    "fields": [
      {
        "key": "mode",
        "label": "Comparison rules",
        "value": "NFC + Unicode full case fold",
        "type": "select",
        "values": [
          "NFC + Unicode full case fold",
          "NFD + Unicode full case fold",
          "NFC only",
          "NFD only"
        ]
      }
    ],
    "files": true,
    "input": false,
    "directory": true,
    "multiple": true,
    "deferImagePreview": true,
    "presentation": "metrics",
    "metadataOnly": true,
    "maxFileBytes": 9007199254740991,
    "uploadHelp": "Choose one folder, up to 2,000 files. File contents are not read.",
    "note": "Inspect names, relative paths and file sizes locally. No file contents are read. Empty folders and inaccessible entries are not exposed by the browser folder picker.",
    "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.",
      "helpParts": [
        "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"
  }
}

Page guide

Find filenames and directories that become equivalent after Unicode normalization or case folding.

How to use Unicode filename collision checker
  1. Choose the folder you want to inspect.
  2. Review the options and run the check.
  3. Read the result and download the report.

Useful next steps

Choose one local folder

Use the folder picker and confirm the files you want to inspect. Nested paths are preserved. Choosing another folder replaces the selection.

Review the result

Find filenames and directories that become equivalent after Unicode normalization or case folding.

Download your report

Save the report or manifest to keep the results. Your source files are unchanged, and the processing stays in your browser.