diff --git a/src/vaultctl/cli.py b/src/vaultctl/cli.py
index bb67be7..4e96432 100644
--- a/src/vaultctl/cli.py
+++ b/src/vaultctl/cli.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import base64
 import builtins
 import json
 import re
@@ -29,7 +30,7 @@
 from .search import MAX_PATTERN_LENGTH, SearchMatch, filter_keys, search_values
 from .types import detect_entry_type, get_entry_fields, get_field_value
 from .vault import VaultError, decrypt_vault, edit_vault, encrypt_vault
-from .yaml_util import dump_yaml
+from .yaml_util import clean_multiline_value, dump_yaml
 
 
 def _format_value(value: Any) -> str:
@@ -365,9 +366,17 @@ def _print_context_results(matches: list[SearchMatch], *, show_match: bool) -> N
 @click.argument("key")
 @click.option("--field", default=None, help="Access a specific field of a structured entry.")
 @click.option("--json", "output_json", is_flag=True, default=False, help="Output as JSON.")
+@click.option("--raw", is_flag=True, default=False, help="Output raw value without headers or formatting.")
+@click.option("--base64", "output_base64", is_flag=True, default=False, help="Output value as base64-encoded string.")
 @pass_ctx
-def get(vctx: VaultContext, key: str, field: str | None, output_json: bool) -> None:
+def get(vctx: VaultContext, key: str, field: str | None, output_json: bool, raw: bool, output_base64: bool) -> None:
     """Show the value of a vault key."""
+    # Validate mutually exclusive output flags
+    output_flags = sum([output_json, raw, output_base64])
+    if output_flags > 1:
+        click.echo("Error: --json, --raw, and --base64 are mutually exclusive.", err=True)
+        sys.exit(1)
+
     try:
         data = decrypt_vault(vctx.config.vault_file, vctx.password)
     except VaultError as exc:
@@ -388,6 +397,10 @@ def get(vctx: VaultContext, key: str, field: str | None, output_json: bool) -> N
             sys.exit(1)
         if output_json:
             click.echo(json.dumps(field_val, indent=2, ensure_ascii=False))
+        elif raw:
+            _output_raw(field_val)
+        elif output_base64:
+            _output_base64_encoded(field_val)
         else:
             click.echo(_format_value(field_val))
         return
@@ -396,6 +409,14 @@ def get(vctx: VaultContext, key: str, field: str | None, output_json: bool) -> N
         click.echo(json.dumps(value, indent=2, ensure_ascii=False))
         return
 
+    if raw:
+        _output_raw(value)
+        return
+
+    if output_base64:
+        _output_base64_encoded(value)
+        return
+
     entry_type = detect_entry_type(value)
     if isinstance(value, dict):
         click.echo(f"Type: {entry_type}")
@@ -405,11 +426,37 @@ def get(vctx: VaultContext, key: str, field: str | None, output_json: bool) -> N
         click.echo(value, nl=not isinstance(value, str) or not value.endswith("\n"))
 
 
+def _output_raw(value: Any) -> None:
+    """Output a value in raw mode: cleaned multiline string, no headers."""
+    text = _format_value(value)
+    if isinstance(value, str):
+        text = clean_multiline_value(text)
+    # Write to stdout directly, no extra newline (clean_multiline_value ensures trailing \n)
+    click.get_text_stream("stdout").write(text if text.endswith("\n") else text + "\n")
+
+
+def _output_base64_encoded(value: Any) -> None:
+    """Output a value as a single base64-encoded line."""
+    text = _format_value(value)
+    if isinstance(value, str):
+        text = clean_multiline_value(text)
+    encoded = base64.b64encode(text.encode("utf-8")).decode("ascii")
+    click.echo(encoded)
+
+
 @main.command()
 @click.argument("key")
 @click.argument("value", required=False)
 @click.option("--prompt", "use_prompt", is_flag=True, help="Enter value interactively.")
 @click.option("--file", "from_file", type=click.Path(exists=True), help="Read value from file.")
+@click.option("--base64", "from_base64", default=None, help="Set value from base64-encoded string.")
+@click.option(
+    "--base64-file",
+    "from_base64_file",
+    type=click.Path(),
+    default=None,
+    help="Read base64-encoded value from file (use '-' for stdin).",
+)
 @click.option("--backup/--no-backup", default=True, help="Save previous value as <key>_previous.")
 @click.option("--expires", default=None, help="Expiry date (YYYY-MM-DD) for vault-keys.yml.")
 @click.option("--force", is_flag=True, default=False, help="Skip confirmation prompts.")
@@ -420,12 +467,14 @@ def set(
     value: str | None,
     use_prompt: bool,
     from_file: str | None,
+    from_base64: str | None,
+    from_base64_file: str | None,
     backup: bool,
     expires: str | None,
     force: bool,
 ) -> None:
     """Set a vault key."""
-    value = _resolve_set_value(value, use_prompt, from_file, key)
+    value = _resolve_set_value(value, use_prompt, from_file, from_base64, from_base64_file, key)
 
     try:
         data = decrypt_vault(vctx.config.vault_file, vctx.password)
@@ -686,22 +735,70 @@ def _print_detection_json(results: list[DetectionResult]) -> None:
     click.echo(json.dumps(items, indent=2))
 
 
-def _resolve_set_value(value: str | None, use_prompt: bool, from_file: str | None, key: str) -> str:
-    """Resolve the value for a set operation from the three input modes.
+def _resolve_set_value(
+    value: str | None,
+    use_prompt: bool,
+    from_file: str | None,
+    from_base64: str | None,
+    from_base64_file: str | None,
+    key: str,
+) -> str:
+    """Resolve the value for a set operation from the available input modes.
 
     Returns the resolved value string.  Calls ``sys.exit(1)`` if no value
-    can be determined.
+    can be determined or if multiple input modes are specified.
     """
+
+    # Count how many input sources are provided
+    sources = sum(
+        [
+            value is not None,
+            use_prompt,
+            from_file is not None,
+            from_base64 is not None,
+            from_base64_file is not None,
+        ]
+    )
+    if sources > 1:
+        click.echo(
+            "Error: Specify only one of: <value>, --prompt, --file, --base64, --base64-file.",
+            err=True,
+        )
+        sys.exit(1)
+
     if use_prompt:
         resolved: str = click.prompt(f"Value for {key}", hide_input=True)
         if not resolved:
             click.echo("Error: Empty value.", err=True)
             sys.exit(1)
         return resolved
+
     if from_file:
-        return Path(from_file).read_text(encoding="utf-8")
+        return clean_multiline_value(Path(from_file).read_text(encoding="utf-8"))
+
+    if from_base64 is not None:
+        try:
+            return base64.b64decode(from_base64).decode("utf-8")
+        except Exception:
+            click.echo("Error: Invalid base64 input.", err=True)
+            sys.exit(1)
+
+    if from_base64_file is not None:
+        try:
+            if from_base64_file == "-":
+                raw = sys.stdin.read().strip()
+            else:
+                raw = Path(from_base64_file).read_text(encoding="utf-8").strip()
+            return base64.b64decode(raw).decode("utf-8")
+        except Exception:
+            click.echo("Error: Invalid base64 input.", err=True)
+            sys.exit(1)
+
     if value is None:
-        click.echo("Error: No value provided. Use <value>, --prompt or --file.", err=True)
+        click.echo(
+            "Error: No value provided. Use <value>, --prompt, --file, --base64, or --base64-file.",
+            err=True,
+        )
         sys.exit(1)
     return value
 
diff --git a/src/vaultctl/yaml_util.py b/src/vaultctl/yaml_util.py
index 1329da7..02d5afa 100644
--- a/src/vaultctl/yaml_util.py
+++ b/src/vaultctl/yaml_util.py
@@ -30,3 +30,14 @@ def load_yaml_text(text: str) -> dict[str, Any]:
 def dump_yaml_text(data: dict[str, Any]) -> str:
     """Serialize *data* to a YAML string with stable formatting."""
     return yaml.dump(data, default_flow_style=False, allow_unicode=True, sort_keys=True)
+
+
+def clean_multiline_value(value: str) -> str:
+    """Strip trailing whitespace per line and ensure exactly one trailing newline.
+
+    This is essential for SSH keys and certificates stored in YAML,
+    where multiline formatting may introduce trailing spaces.
+    """
+    lines = value.splitlines()
+    cleaned = "\n".join(line.rstrip() for line in lines)
+    return cleaned.rstrip("\n") + "\n"
diff --git a/tests/conftest.py b/tests/conftest.py
index 9c23c65..755eadc 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -50,6 +50,7 @@ def vault_file(tmp_path):
             "username": "deploy",
             "password": "d3ploy",
         },
+        "ssh_key": "-----BEGIN OPENSSH PRIVATE KEY-----\nb3BlbnNzaC1rZXktdjEA  \nAAAAGnRlc3Qga2V5  \n-----END OPENSSH PRIVATE KEY-----\n",
     }
     plain = tmp_path / "vault-plain.yml"
     encrypted = tmp_path / "vault.yml"
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 04ed4be..35015f3 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -478,3 +478,171 @@ def test_search_context_top_level_string(runner, cli_env):
     result = runner.invoke(main, ["search", "test_value", "--context"])
     assert result.exit_code == 0
     assert "test_key" in result.output
+
+
+# --- get --raw tests ---
+
+
+def test_get_raw_plain_string(runner, cli_env):
+    """--raw outputs a plain string value without any formatting."""
+    result = runner.invoke(main, ["get", "test_key", "--raw"])
+    assert result.exit_code == 0
+    assert result.output == "test_value\n"
+
+
+def test_get_raw_multiline_strips_trailing_whitespace(runner, cli_env):
+    """--raw strips trailing whitespace from each line of a multiline value."""
+    result = runner.invoke(main, ["get", "ssh_key", "--raw"])
+    assert result.exit_code == 0
+    # The test fixture has trailing spaces on some lines
+    for line in result.output.splitlines():
+        assert line == line.rstrip(), f"Trailing whitespace found: {line!r}"
+    assert result.output.endswith("\n")
+    assert "BEGIN OPENSSH PRIVATE KEY" in result.output
+
+
+def test_get_raw_with_field(runner, cli_env):
+    """--raw --field outputs only the field value, no 'Type:' header."""
+    result = runner.invoke(main, ["get", "db_creds", "--field", "username", "--raw"])
+    assert result.exit_code == 0
+    assert result.output == "admin\n"
+    assert "Type:" not in result.output
+
+
+def test_get_raw_structured_entry(runner, cli_env):
+    """--raw on a structured entry outputs YAML without 'Type:' header."""
+    result = runner.invoke(main, ["get", "db_creds", "--raw"])
+    assert result.exit_code == 0
+    assert "Type:" not in result.output
+    assert "username: admin" in result.output
+
+
+# --- get --base64 tests ---
+
+
+def test_get_base64_plain_string(runner, cli_env):
+    """--base64 outputs the value as base64-encoded string."""
+    import base64
+
+    result = runner.invoke(main, ["get", "test_key", "--base64"])
+    assert result.exit_code == 0
+    decoded = base64.b64decode(result.output.strip()).decode("utf-8")
+    assert "test_value" in decoded
+
+
+def test_get_base64_multiline(runner, cli_env):
+    """--base64 on a multiline value produces a single base64 line."""
+    import base64
+
+    result = runner.invoke(main, ["get", "ssh_key", "--base64"])
+    assert result.exit_code == 0
+    # Output should be a single line (base64 encoded)
+    assert "\n" not in result.output.strip()
+    decoded = base64.b64decode(result.output.strip()).decode("utf-8")
+    assert "BEGIN OPENSSH PRIVATE KEY" in decoded
+    # Decoded value should have no trailing whitespace on lines
+    for line in decoded.splitlines():
+        assert line == line.rstrip()
+
+
+def test_get_base64_with_field(runner, cli_env):
+    """--base64 --field outputs the field value base64-encoded."""
+    import base64
+
+    result = runner.invoke(main, ["get", "db_creds", "--field", "password", "--base64"])
+    assert result.exit_code == 0
+    decoded = base64.b64decode(result.output.strip()).decode("utf-8")
+    assert "s3cret" in decoded
+
+
+# --- mutually exclusive output flags ---
+
+
+def test_get_mutually_exclusive_flags(runner, cli_env):
+    """--json, --raw, and --base64 are mutually exclusive."""
+    result = runner.invoke(main, ["get", "test_key", "--raw", "--json"])
+    assert result.exit_code == 1
+    assert "mutually exclusive" in result.output
+
+    result = runner.invoke(main, ["get", "test_key", "--raw", "--base64"])
+    assert result.exit_code == 1
+    assert "mutually exclusive" in result.output
+
+    result = runner.invoke(main, ["get", "test_key", "--json", "--base64"])
+    assert result.exit_code == 1
+    assert "mutually exclusive" in result.output
+
+
+# --- set --base64 tests ---
+
+
+def test_set_base64_inline(runner, cli_env):
+    """--base64 decodes a base64 value before storing."""
+    import base64
+
+    encoded = base64.b64encode(b"decoded_secret").decode("ascii")
+    result = runner.invoke(main, ["set", "b64_key", "--base64", encoded, "--force", "--no-backup"])
+    assert result.exit_code == 0
+    assert "Added" in result.output
+
+    # Verify the decoded value was stored
+    result = runner.invoke(main, ["get", "b64_key", "--raw"])
+    assert result.exit_code == 0
+    assert "decoded_secret" in result.output
+
+
+def test_set_base64_invalid(runner, cli_env):
+    """--base64 with invalid base64 input should fail."""
+    result = runner.invoke(main, ["set", "b64_key", "--base64", "not-valid-base64!!!", "--force"])
+    assert result.exit_code == 1
+    assert "Invalid base64" in result.output
+
+
+def test_set_base64_file_from_file(runner, cli_env, tmp_path):
+    """--base64-file reads base64 from a file and decodes it."""
+    import base64
+
+    secret = "file_based_secret"
+    b64_file = tmp_path / "encoded.b64"
+    b64_file.write_text(base64.b64encode(secret.encode()).decode())
+
+    result = runner.invoke(main, ["set", "b64f_key", "--base64-file", str(b64_file), "--force", "--no-backup"])
+    assert result.exit_code == 0
+
+    result = runner.invoke(main, ["get", "b64f_key", "--raw"])
+    assert result.exit_code == 0
+    assert "file_based_secret" in result.output
+
+
+def test_set_base64_file_stdin(runner, cli_env):
+    """--base64-file - reads base64 from stdin."""
+    import base64
+
+    encoded = base64.b64encode(b"stdin_secret").decode("ascii")
+    result = runner.invoke(main, ["set", "stdin_key", "--base64-file", "-", "--force", "--no-backup"], input=encoded)
+    assert result.exit_code == 0
+
+    result = runner.invoke(main, ["get", "stdin_key", "--raw"])
+    assert result.exit_code == 0
+    assert "stdin_secret" in result.output
+
+
+def test_set_multiple_sources_rejected(runner, cli_env):
+    """Specifying multiple input sources should fail."""
+    result = runner.invoke(main, ["set", "key", "value", "--base64", "abc", "--force"])
+    assert result.exit_code == 1
+    assert "Specify only one" in result.output
+
+
+def test_set_file_cleans_whitespace(runner, cli_env, tmp_path):
+    """--file import applies whitespace cleanup to multiline values."""
+    key_file = tmp_path / "key.pem"
+    key_file.write_text("-----BEGIN KEY-----\nline1  \nline2\t\n-----END KEY-----\n")
+
+    result = runner.invoke(main, ["set", "clean_key", "--file", str(key_file), "--force", "--no-backup"])
+    assert result.exit_code == 0
+
+    result = runner.invoke(main, ["get", "clean_key", "--raw"])
+    assert result.exit_code == 0
+    for line in result.output.splitlines():
+        assert line == line.rstrip(), f"Trailing whitespace found: {line!r}"
diff --git a/tests/test_yaml_util.py b/tests/test_yaml_util.py
new file mode 100644
index 0000000..cd5069b
--- /dev/null
+++ b/tests/test_yaml_util.py
@@ -0,0 +1,39 @@
+"""Tests for vaultctl.yaml_util module."""
+
+from __future__ import annotations
+
+from vaultctl.yaml_util import clean_multiline_value
+
+
+class TestCleanMultilineValue:
+    def test_strips_trailing_spaces(self) -> None:
+        result = clean_multiline_value("line1  \nline2\t\nline3\n")
+        assert result == "line1\nline2\nline3\n"
+
+    def test_ensures_trailing_newline(self) -> None:
+        result = clean_multiline_value("no trailing newline")
+        assert result == "no trailing newline\n"
+
+    def test_single_trailing_newline(self) -> None:
+        result = clean_multiline_value("line\n\n\n")
+        assert result == "line\n"
+
+    def test_ssh_key_format(self) -> None:
+        key = "-----BEGIN OPENSSH PRIVATE KEY-----\nb3BlbnNzaC1rZXktdjEA  \nAAAA  \n-----END OPENSSH PRIVATE KEY-----\n"
+        result = clean_multiline_value(key)
+        assert "  " not in result
+        assert result.startswith("-----BEGIN OPENSSH PRIVATE KEY-----\n")
+        assert result.endswith("-----END OPENSSH PRIVATE KEY-----\n")
+
+    def test_empty_string(self) -> None:
+        result = clean_multiline_value("")
+        assert result == "\n"
+
+    def test_preserves_internal_spaces(self) -> None:
+        result = clean_multiline_value("hello world\nfoo  bar\n")
+        assert result == "hello world\nfoo  bar\n"
+
+    def test_already_clean(self) -> None:
+        clean = "line1\nline2\nline3\n"
+        result = clean_multiline_value(clean)
+        assert result == clean