diff --git a/crates/ruff_cli/src/args.rs b/crates/ruff_cli/src/args.rs
index a3c8c927eab6c6..1c34795cc00ad1 100644
--- a/crates/ruff_cli/src/args.rs
+++ b/crates/ruff_cli/src/args.rs
@@ -368,6 +368,12 @@ pub struct FormatCommand {
     /// The name of the file when passing it through stdin.
     #[arg(long, help_heading = "Miscellaneous")]
     pub stdin_filename: Option<PathBuf>,
+
+    /// Enable preview mode; checks will include unstable rules and fixes.
+    #[arg(long, overrides_with("no_preview"), hide = true)]
+    preview: bool,
+    #[clap(long, overrides_with("preview"), hide = true)]
+    no_preview: bool,
 }
 
 #[derive(Debug, Clone, Copy, clap::ValueEnum)]
@@ -496,6 +502,7 @@ impl FormatCommand {
                     self.respect_gitignore,
                     self.no_respect_gitignore,
                 ),
+                preview: resolve_bool_arg(self.preview, self.no_preview).map(PreviewMode::from),
                 force_exclude: resolve_bool_arg(self.force_exclude, self.no_force_exclude),
                 // Unsupported on the formatter CLI, but required on `Overrides`.
                 ..Overrides::default()
diff --git a/crates/ruff_cli/src/commands/format.rs b/crates/ruff_cli/src/commands/format.rs
index f46e6308ff204c..789b1511d56450 100644
--- a/crates/ruff_cli/src/commands/format.rs
+++ b/crates/ruff_cli/src/commands/format.rs
@@ -13,6 +13,7 @@ use tracing::{debug, warn};
 
 use ruff::fs;
 use ruff::logging::LogLevel;
+use ruff::settings::types::PreviewMode;
 use ruff::warn_user_once;
 use ruff_formatter::LineWidth;
 use ruff_python_ast::{PySourceType, SourceType};
@@ -72,9 +73,15 @@ pub(crate) fn format(
                         return None;
                     };
 
+                    let preview = match pyproject_config.settings.lib.preview {
+                        PreviewMode::Enabled => ruff_python_formatter::PreviewMode::Enabled,
+                        PreviewMode::Disabled => ruff_python_formatter::PreviewMode::Disabled,
+                    };
+
                     let line_length = resolver.resolve(path, &pyproject_config).line_length;
                     let options = PyFormatOptions::from_source_type(source_type)
-                        .with_line_width(LineWidth::from(NonZeroU16::from(line_length)));
+                        .with_line_width(LineWidth::from(NonZeroU16::from(line_length)))
+                        .with_preview(preview);
                     debug!("Formatting {} with {:?}", path.display(), options);
                     Some(format_path(path, options, mode))
                 }
diff --git a/crates/ruff_python_formatter/src/lib.rs b/crates/ruff_python_formatter/src/lib.rs
index f2b2486f70a602..4d96a9374eda82 100644
--- a/crates/ruff_python_formatter/src/lib.rs
+++ b/crates/ruff_python_formatter/src/lib.rs
@@ -14,7 +14,7 @@ use crate::comments::{
     dangling_comments, leading_comments, trailing_comments, Comments, SourceComment,
 };
 pub use crate::context::PyFormatContext;
-pub use crate::options::{MagicTrailingComma, PyFormatOptions, QuoteStyle};
+pub use crate::options::{MagicTrailingComma, PreviewMode, PyFormatOptions, QuoteStyle};
 use crate::verbatim::suppressed_node;
 
 pub(crate) mod builders;
diff --git a/crates/ruff_python_formatter/src/options.rs b/crates/ruff_python_formatter/src/options.rs
index c089d3f6a23ea9..e68746dcdabd55 100644
--- a/crates/ruff_python_formatter/src/options.rs
+++ b/crates/ruff_python_formatter/src/options.rs
@@ -39,6 +39,9 @@ pub struct PyFormatOptions {
     /// Should the formatter generate a source map that allows mapping source positions to positions
     /// in the formatted document.
     source_map_generation: SourceMapGeneration,
+
+    /// Whether preview style formatting is enabled or not
+    preview: PreviewMode,
 }
 
 fn default_line_width() -> LineWidth {
@@ -64,6 +67,7 @@ impl Default for PyFormatOptions {
             line_ending: LineEnding::default(),
             magic_trailing_comma: MagicTrailingComma::default(),
             source_map_generation: SourceMapGeneration::default(),
+            preview: PreviewMode::default(),
         }
     }
 }
@@ -101,6 +105,10 @@ impl PyFormatOptions {
         self.line_ending
     }
 
+    pub fn preview(&self) -> PreviewMode {
+        self.preview
+    }
+
     #[must_use]
     pub fn with_tab_width(mut self, tab_width: TabWidth) -> Self {
         self.tab_width = tab_width;
@@ -136,6 +144,12 @@ impl PyFormatOptions {
         self.line_ending = line_ending;
         self
     }
+
+    #[must_use]
+    pub fn with_preview(mut self, preview: PreviewMode) -> Self {
+        self.preview = preview;
+        self
+    }
 }
 
 impl FormatOptions for PyFormatOptions {
@@ -246,3 +260,18 @@ impl FromStr for MagicTrailingComma {
         }
     }
 }
+
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Default)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+pub enum PreviewMode {
+    #[default]
+    Disabled,
+
+    Enabled,
+}
+
+impl PreviewMode {
+    pub const fn is_enabled(self) -> bool {
+        matches!(self, PreviewMode::Enabled)
+    }
+}