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+# FileHashr
+
+**Contributor:** bavi404
+
+## Description
+Simple CLI tool to generate cryptographic hashes (SHA256 by default) for files or stdin. Useful for integrity checks and quick verifications.
+
+## Features
+- Hash a file or standard input
+- Algorithms: sha256 (default), sha1, md5
+- Output plain hash with optional filename
+
+## Usage
+```bash
+# Hash a file (sha256)
+python3 filehashr.py path/to/file
+
+# Specify algorithm
+python3 filehashr.py --algo sha1 path/to/file
+
+# Read from stdin
+echo "hello" | python3 filehashr.py --algo md5
+```
+
+## Arguments
+- `path` (optional): Path to the file. If omitted, reads from stdin.
+- `--algo` / `-a`: Hash algorithm (`sha256`, `sha1`, `md5`). Default: `sha256`.
+- `--label` / `-l`: Append filename label to output when hashing a file.
+
+## Requirements
+- Python 3.8+
+- No external dependencies
+
+## Examples
+```bash
+python3 filehashr.py sample.txt
+python3 filehashr.py -a md5 -l sample.txt
+cat sample.txt | python3 filehashr.py -a sha1
+```
+
+## Notes
+- For large files, the script streams in chunks to minimize memory usage.
+
+
diff --git a/Domains/cli/MiniProjects/FileHashr/filehashr.py b/Domains/cli/MiniProjects/FileHashr/filehashr.py
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+#!/usr/bin/env python3
+import argparse
+import hashlib
+import sys
+from pathlib import Path
+
+
+CHUNK_SIZE_BYTES = 1024 * 1024  # 1 MiB
+
+
+def create_hasher(algorithm: str) -> "hashlib._Hash":
+    normalized = algorithm.lower()
+    if normalized not in {"sha256", "sha1", "md5"}:
+        raise ValueError(f"Unsupported algorithm: {algorithm}. Use sha256, sha1, or md5.")
+    return getattr(hashlib, normalized)()
+
+
+def hash_file(path: Path, algorithm: str) -> str:
+    hasher = create_hasher(algorithm)
+    with path.open("rb") as file_handle:
+        while True:
+            chunk = file_handle.read(CHUNK_SIZE_BYTES)
+            if not chunk:
+                break
+            hasher.update(chunk)
+    return hasher.hexdigest()
+
+
+def hash_stdin(algorithm: str) -> str:
+    hasher = create_hasher(algorithm)
+    stdin_buffer = getattr(sys.stdin, "buffer", sys.stdin)
+    while True:
+        chunk = stdin_buffer.read(CHUNK_SIZE_BYTES)
+        if not chunk:
+            break
+        hasher.update(chunk)
+    return hasher.hexdigest()
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        description="Generate cryptographic hash for a file or stdin (default: sha256)",
+    )
+    parser.add_argument(
+        "path",
+        nargs="?",
+        type=Path,
+        help="Path to file. If omitted, reads from stdin",
+    )
+    parser.add_argument(
+        "-a",
+        "--algo",
+        default="sha256",
+        choices=["sha256", "sha1", "md5"],
+        help="Hash algorithm to use",
+    )
+    parser.add_argument(
+        "-l",
+        "--label",
+        action="store_true",
+        help="Append filename to output when hashing a file",
+    )
+    return parser.parse_args()
+
+
+def main() -> int:
+    args = parse_args()
+    try:
+        if args.path is None:
+            digest = hash_stdin(args.algo)
+            print(digest)
+            return 0
+
+        if not args.path.exists() or not args.path.is_file():
+            print(f"Error: File not found: {args.path}", file=sys.stderr)
+            return 2
+
+        digest = hash_file(args.path, args.algo)
+        if args.label:
+            print(f"{digest}  {args.path}")
+        else:
+            print(digest)
+        return 0
+    except BrokenPipeError:
+        return 0
+    except Exception as exc:  # deliberate broad to present clear CLI error
+        print(f"Error: {exc}", file=sys.stderr)
+        return 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
+
+