diff --git a/Cargo.lock b/Cargo.lock
index c088c03..69acda4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -482,9 +482,9 @@ dependencies = [
 
 [[package]]
 name = "csv"
-version = "1.3.0"
+version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac574ff4d437a7b5ad237ef331c17ccca63c46479e5b5453eb8e10bb99a759fe"
+checksum = "acdc4883a9c96732e4733212c01447ebd805833b7275a73ca3ee080fd77afdaf"
 dependencies = [
  "csv-core",
  "itoa",
@@ -501,16 +501,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "csvx"
-version = "0.1.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92081efd8b1d03f5a1bf242876cfdd8fa2bf9fe521ddb2d31f8747dfa2dd2cb7"
-dependencies = [
- "csv",
- "thiserror",
-]
-
 [[package]]
 name = "deranged"
 version = "0.3.11"
@@ -1507,7 +1497,7 @@ dependencies = [
  "clap",
  "colorsys",
  "crossterm",
- "csvx",
+ "csv",
  "futures",
  "ironcalc",
  "ratatui",
diff --git a/Cargo.toml b/Cargo.toml
index fb9fea2..360d494 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,6 @@ edition = "2021"
 anyhow = { version = "1.0.91", features = ["backtrace"] }
 clap = { version = "4.5.20", features = ["derive"] }
 crossterm = { version = "0.28.1", features = ["event-stream", "serde"] }
-csvx = "0.1.17"
 # this revision introduces a way to get the Model back out of the UserModel
 ironcalc = { git = "https://github.com/ironcalc/IronCalc" }
 futures = "0.3.31"
@@ -21,3 +20,4 @@ slice-utils = { git = "https://dev.zaphar.net/zaphar/slice-cursor-rs.git" }
 serde_json = "1.0.133"
 colorsys = "0.6.7"
 tui-markdown = { version = "0.3.1", features = [] }
+csv = "1.3.1"
diff --git a/docs/command.md b/docs/command.md
index 921c735..a8a5058 100644
--- a/docs/command.md
+++ b/docs/command.md
@@ -12,6 +12,7 @@ The currently supported commands are:
 * `new-sheet [name]` Creates a new sheet. If the name is provided then uses that. If omitted then uses a default sheet name.
 * `select-sheet <name>` Select a sheet by name.
 * `edit <path>` Edit a new spreadsheet at the current path. `e` is a shorthand alias for this command. 
+* `export-csv <path>` Export the current sheet to a csv file at `<path>`.
 * `quit` Quits the application. `q` is a shorthand alias for this command.
 
 <aside>Note that in the case of `quit` and `edit` that we do not currently
diff --git a/src/book/mod.rs b/src/book/mod.rs
index 89ef8c0..ea46357 100644
--- a/src/book/mod.rs
+++ b/src/book/mod.rs
@@ -23,7 +23,6 @@ pub(crate) const COL_PIXELS: f64 = 5.0;
 pub(crate) const LAST_COLUMN: i32 = 16_384;
 pub(crate) const LAST_ROW: i32 = 1_048_576;
 
-
 #[derive(Debug, Clone)]
 pub struct AddressRange<'book> {
     pub start: &'book Address,
@@ -37,7 +36,11 @@ impl<'book> AddressRange<'book> {
         for ri in row_range.iter() {
             let mut row = Vec::with_capacity(col_range.len());
             for ci in col_range.iter() {
-                row.push(Address { sheet: self.start.sheet, row: *ri, col: *ci });
+                row.push(Address {
+                    sheet: self.start.sheet,
+                    row: *ri,
+                    col: *ci,
+                });
             }
             rows.push(row);
         }
@@ -49,7 +52,11 @@ impl<'book> AddressRange<'book> {
         let mut rows = Vec::with_capacity(row_range.len() * col_range.len());
         for ri in row_range.iter() {
             for ci in col_range.iter() {
-                rows.push(Address { sheet: self.start.sheet, row: *ri, col: *ci });
+                rows.push(Address {
+                    sheet: self.start.sheet,
+                    row: *ri,
+                    col: *ci,
+                });
             }
         }
         rows
@@ -112,6 +119,58 @@ impl Book {
         )?))
     }
 
+    pub fn csv_for_sheet<W>(&self, sheet: u32, sink: W) -> Result<()>
+    where
+        W: std::io::Write,
+    {
+        let rows = self.get_export_rows_for_sheet(sheet)?;
+        let mut writer = csv::Writer::from_writer(sink);
+        for row in rows {
+            writer.write_record(row)?;
+        }
+        Ok(())
+    }
+
+    pub fn get_export_rows(&self) -> Result<Vec<Vec<String>>> {
+        let sheet = self.location.sheet;
+        Ok(self.get_export_rows_for_sheet(sheet)?)
+    }
+
+    pub fn get_export_rows_for_sheet(&self, sheet: u32) -> Result<Vec<Vec<String>>, anyhow::Error> {
+        let worksheet = self
+            .model
+            .get_model()
+            .workbook
+            .worksheet(sheet)
+            .map_err(|e| anyhow!(e))?;
+        let mut max_row = 0;
+        let mut max_col = 0;
+        for (r, cols) in worksheet.sheet_data.iter() {
+            if max_row <= *r {
+                max_row = *r;
+            }
+            for (c, _) in cols.iter() {
+                if max_col <= *c {
+                    max_col = *c;
+                }
+            }
+        }
+        let mut rows = Vec::new();
+        for ri in 0..=max_row {
+            let mut row = Vec::new();
+            for ci in 0..=max_col {
+                let cell_content = self.get_cell_addr_rendered(&Address {
+                    sheet,
+                    row: ri as usize,
+                    col: ci as usize,
+                })?;
+                row.push(cell_content);
+            }
+            rows.push(row);
+        }
+        Ok(rows)
+    }
+
     /// Evaluate the spreadsheet calculating formulas and style changes.
     /// This can be an expensive operation.
     pub fn evaluate(&mut self) {
@@ -123,6 +182,15 @@ impl Book {
         Ok(Self::from_model(load_from_xlsx(path, locale, tz)?))
     }
 
+    /// Save a sheet in the book to a csv file
+    pub fn save_sheet_to_csv(&self, sheet: u32, path: &str) -> Result<()> {
+        let file_path = std::path::Path::new(path);
+        let file = std::fs::File::create(file_path)?;
+        let writer = std::io::BufWriter::new(file);
+        self.csv_for_sheet(sheet, writer)?;
+        Ok(())
+    }
+
     /// Save book to an xlsx file.
     pub fn save_to_xlsx(&mut self, path: &str) -> Result<()> {
         // TODO(zaphar): Currently overwrites. Should we prompt in this case?
@@ -604,7 +672,13 @@ impl Book {
             .get_model()
             .workbook
             .worksheet(self.location.sheet)
-            .map_err(|s| anyhow!("Invalid Worksheet id: {}: error: {}", self.location.sheet, s))?)
+            .map_err(|s| {
+                anyhow!(
+                    "Invalid Worksheet id: {}: error: {}",
+                    self.location.sheet,
+                    s
+                )
+            })?)
     }
 
     pub(crate) fn get_sheet_name_by_idx(&self, idx: usize) -> Result<&str> {
@@ -636,7 +710,15 @@ impl Default for Book {
     fn default() -> Self {
         let mut book =
             Book::new(UserModel::new_empty("default_name", "en", "America/New_York").unwrap());
-        book.update_cell(&Address { sheet: 0, row: 1, col: 1 }, "").unwrap();
+        book.update_cell(
+            &Address {
+                sheet: 0,
+                row: 1,
+                col: 1,
+            },
+            "",
+        )
+        .unwrap();
         book
     }
 }
diff --git a/src/book/test.rs b/src/book/test.rs
index e3dfaf7..6ece6b7 100644
--- a/src/book/test.rs
+++ b/src/book/test.rs
@@ -108,3 +108,21 @@ fn test_book_col_size() {
     book.set_col_size(1, 20).expect("Failed to set column size");
     assert_eq!(20, book.get_col_size(1).expect("Failed to get column size"));
 }
+
+#[test]
+fn test_book_get_exportable_rows() {
+    let mut book = Book::default();
+    book.update_cell(&Address { sheet: 0, row: 1, col: 3 }, "1-3")
+        .expect("failed to edit cell");
+    book.update_cell(&Address { sheet: 0, row: 3, col: 6 }, "3-6")
+        .expect("failed to edit cell");
+
+    let rows = book.get_export_rows().expect("Failed to get export rows");
+    assert_eq!(4, rows.len());
+    assert_eq!(rows, vec![
+        vec!["", "" , "", "", "", "", ""],
+        vec!["", "" , "", "1-3", "", "", ""],
+        vec!["", "" , "", "", "", "", ""],
+        vec!["", "" , "", "", "", "", "3-6"],
+    ]);
+}
diff --git a/src/ui/cmd.rs b/src/ui/cmd.rs
index fed68d1..298a124 100644
--- a/src/ui/cmd.rs
+++ b/src/ui/cmd.rs
@@ -15,6 +15,7 @@ pub enum Cmd<'a> {
     SelectSheet(&'a str),
     Edit(&'a str),
     Help(Option<&'a str>),
+    ExportCsv(&'a str),
     Quit,
 }
 
@@ -35,10 +36,14 @@ pub fn parse<'cmd, 'i: 'cmd>(input: &'i str) -> Result<Option<Cmd<'cmd>>, &'stat
     if let Some(cmd) = try_consume_insert_row(cursor.clone())? {
         return Ok(Some(cmd));
     }
-    //// try consume insert-col command.
+    // try consume insert-col command.
     if let Some(cmd) = try_consume_insert_column(cursor.clone())? {
         return Ok(Some(cmd));
     }
+    // Try consume export
+    if let Some(cmd) = try_consume_export_csv(cursor.clone())? {
+        return Ok(Some(cmd));
+    }
     // try consume edit command.
     if let Some(cmd) = try_consume_edit(cursor.clone())? {
         return Ok(Some(cmd));
@@ -99,7 +104,7 @@ fn try_consume_write<'cmd, 'i: 'cmd>(
         return Ok(None);
     }
     if input.remaining() > 0 && !is_ws(&mut input) {
-        return Err("Invalid command: Did you mean to type `write <arg>`?");
+        return Err("Invalid command: Did you mean to type `write <path>`?");
     }
     let arg = input.span(0..).trim();
     return Ok(Some(Cmd::Write(if arg.is_empty() {
@@ -109,6 +114,23 @@ fn try_consume_write<'cmd, 'i: 'cmd>(
     })));
 }
 
+fn try_consume_export_csv<'cmd, 'i: 'cmd>(
+    mut input: StrCursor<'i>,
+) -> Result<Option<Cmd<'cmd>>, &'static str> {
+    const LONG: &'static str = "export-csv";
+
+    if compare(input.clone(), LONG) {
+        input.seek(LONG.len());
+    } else {
+        return Ok(None);
+    }
+    if input.remaining() == 0 || !is_ws(&mut input) {
+        return Err("Invalid command: Did you mean to type `export <path>`?");
+    }
+    let arg = input.span(0..).trim();
+    return Ok(Some(Cmd::ExportCsv(arg)));
+}
+
 fn try_consume_new_sheet<'cmd, 'i: 'cmd>(
     mut input: StrCursor<'i>,
 ) -> Result<Option<Cmd<'cmd>>, &'static str> {
diff --git a/src/ui/mod.rs b/src/ui/mod.rs
index e18da11..604064a 100644
--- a/src/ui/mod.rs
+++ b/src/ui/mod.rs
@@ -425,6 +425,10 @@ impl<'ws> Workspace<'ws> {
                 }
                 Ok(None)
             }
+            Ok(Some(Cmd::ExportCsv(path))) => {
+                self.book.save_sheet_to_csv(self.book.location.sheet, path)?;
+                Ok(None)
+            }
             Ok(Some(Cmd::InsertColumns(count))) => {
                 self.book.insert_columns(self.book.location.col, count)?;
                 self.book.evaluate();
diff --git a/src/ui/test.rs b/src/ui/test.rs
index b45166a..a00f3b1 100644
--- a/src/ui/test.rs
+++ b/src/ui/test.rs
@@ -217,6 +217,17 @@ fn test_cmd_new_sheet_with_name() {
     assert_eq!(cmd, Cmd::NewSheet(Some("test")));
 }
 
+#[test]
+fn test_cmd_export() {
+    let input = "export-csv test.csv";
+    let result = parse(input);
+    assert!(result.is_ok());
+    let output = result.unwrap();
+    assert!(output.is_some());
+    let cmd = output.unwrap();
+    assert_eq!(cmd, Cmd::Export("test.csv"));
+}
+
 #[test]
 fn test_cmd_new_sheet_no_name() {
     let input = "new-sheet";