diff --git a/src/ext/spreadsheet/SpoutBuilder.php b/src/ext/spreadsheet/SpoutBuilder.php
index d632353..6624796 100644
--- a/src/ext/spreadsheet/SpoutBuilder.php
+++ b/src/ext/spreadsheet/SpoutBuilder.php
@@ -4,8 +4,12 @@ namespace nur\sery\ext\spreadsheet;
 use nur\sery\file\csv\AbstractBuilder;
 use nur\sery\file\csv\TAbstractBuilder;
 use nur\sery\os\path;
+use nur\sery\php\time\Date;
+use nur\sery\php\time\DateTime;
 use nur\sery\web\http;
+use OpenSpout\Common\Entity\Cell;
 use OpenSpout\Common\Entity\Style\Style;
+use OpenSpout\Common\Helper\CellTypeHelper;
 use OpenSpout\Writer\Common\Creator\WriterEntityFactory;
 use OpenSpout\Writer\WriterMultiSheetsAbstract;
 use OpenSpout\Writer\XLSX\Entity\SheetView;
@@ -13,28 +17,51 @@ use OpenSpout\Writer\XLSX\Entity\SheetView;
 class SpoutBuilder extends AbstractBuilder {
   use TAbstractBuilder;
 
+  const DATE_FORMAT = "mm/dd/yyyy";
+
+  const DATETIME_FORMAT = "mm/dd/yyyy hh:mm:ss";
+
   /** @var string|int|null nom de la feuille dans laquelle écrire */
   const WSNAME = null;
 
   function __construct(?string $output, ?array $params=null) {
     parent::__construct($output, $params);
-    switch (path::ext($this->output)) {
-    case ".ods":
+    $ssType = $params["ss_type"] ?? null;
+    if ($ssType === null) {
+      switch (path::ext($this->output)) {
+      case ".ods":
+        $ssType = "ods";
+        break;
+      case ".xlsx":
+      default:
+        $ssType = "xlsx";
+        break;
+      }
+    }
+    switch ($ssType) {
+    case "ods":
       $ss = WriterEntityFactory::createODSWriter();
       break;
-    case ".xlsx":
+    case "xlsx":
     default:
       $ss = WriterEntityFactory::createXLSXWriter();
       break;
     }
+    $ss->setDefaultColumnWidth(10.5);
     $ss->writeToStream($this->getResource());
     $this->ss = $ss;
+    $this->parseNumeric = boolval($params["parse_numeric"] ?? false);
+    $this->parseDate = boolval($params["parse_date"] ?? true);
     $this->firstSheet = true;
     $this->setWsname($params["wsname"] ?? static::WSNAME);
   }
 
   protected WriterMultiSheetsAbstract $ss;
 
+  protected bool $parseNumeric;
+
+  protected bool $parseDate;
+
   const STYLE_ROW = 0, STYLE_HEADER = 1;
 
   protected int $rowStyle;
@@ -60,14 +87,53 @@ class SpoutBuilder extends AbstractBuilder {
     return $this;
   }
 
-  function _write(array $row): void {
-    $row = WriterEntityFactory::createRowFromArray($row);
-    if ($this->rowStyle === self::STYLE_HEADER) {
-      $row->setStyle((new Style())
-        ->setFontBold()
-      );
+  protected function isNumeric($value): bool {
+    if ($this->parseNumeric && is_numeric($value)) return true;
+    if (!is_string($value) && is_numeric($value)) return true;
+    return false;
+  }
+
+  protected function isDate(&$value, &$style): bool {
+    if (CellTypeHelper::isDateTimeOrDateInterval($value)) {
+      $style = (new Style())->setFormat(self::DATE_FORMAT);
+      return true;
     }
-    $this->ss->addRow($row);
+    if (!is_string($value)) return false;
+    if (DateTime::isa_datetime($value, true)) {
+      $value = new DateTime($value);
+      $style = (new Style())->setFormat(self::DATETIME_FORMAT);
+      return true;
+    }
+    if (DateTime::isa_date($value, true)) {
+      $value = new Date($value);
+      $style = (new Style())->setFormat(self::DATE_FORMAT);
+      return true;
+    }
+    return false;
+  }
+
+  function _write(array $row): void {
+    $cells = [];
+    $rowStyle = null;
+    foreach ($row as $col) {
+      $style = null;
+      if ($col === null || $col === "") {
+        $type = Cell::TYPE_EMPTY;
+      } elseif ($this->isNumeric($col)) {
+        $type = Cell::TYPE_NUMERIC;
+      } elseif ($this->isDate($col, $style)) {
+        $type = Cell::TYPE_DATE;
+      } else {
+        $type = Cell::TYPE_STRING;
+      }
+      $cell = WriterEntityFactory::createCell($col, $style);
+      $cell->setType($type);
+      $cells[] = $cell;
+    }
+    if ($this->rowStyle === self::STYLE_HEADER) {
+      $rowStyle = (new Style())->setFontBold();
+    }
+    $this->ss->addRow(WriterEntityFactory::createRow($cells, $rowStyle));
   }
 
   function writeHeaders(?array $headers=null): void {
@@ -90,6 +156,7 @@ class SpoutBuilder extends AbstractBuilder {
   }
 
   function _sendFile(): int {
+    $this->ss->close();
     $this->rewind();
     $this->sendHeaders();
     return $this->fpassthru();
diff --git a/src/ext/spreadsheet/SpoutReader.php b/src/ext/spreadsheet/SpoutReader.php
index c67fb0b..c44a32b 100644
--- a/src/ext/spreadsheet/SpoutReader.php
+++ b/src/ext/spreadsheet/SpoutReader.php
@@ -11,9 +11,12 @@ class SpoutReader extends AbstractReader {
 
   function __construct($input, ?array $params=null) {
     parent::__construct($input, $params);
+    $this->ssType = $params["ss_type"] ?? null;
     $this->wsname = $params["wsname"] ?? static::WSNAME;
   }
 
+  protected ?string $ssType;
+
   protected $wsname;
 
   /**
@@ -25,7 +28,18 @@ class SpoutReader extends AbstractReader {
   }
 
   function getIterator() {
-    $ss = ReaderEntityFactory::createReaderFromFile($this->input);
+    switch ($this->ssType) {
+    case "ods":
+      $ss = ReaderEntityFactory::createODSReader();
+      break;
+    case "xlsx":
+      $ss = ReaderEntityFactory::createXLSXReader();
+      break;
+    default:
+      $ss = ReaderEntityFactory::createReaderFromFile($this->input);
+      break;
+    }
+    $ss->open($this->input);
     try {
       $found = false;
       foreach ($ss->getSheetIterator() as $ws) {
diff --git a/src/file/csv/TAbstractBuilder.php b/src/file/csv/TAbstractBuilder.php
index fc15ea6..a102570 100644
--- a/src/file/csv/TAbstractBuilder.php
+++ b/src/file/csv/TAbstractBuilder.php
@@ -1,30 +1,57 @@
 <?php
 namespace nur\sery\file\csv;
 
+use nur\sery\cl;
 use nur\sery\file\web\Upload;
 use nur\sery\os\path;
 use nur\sery\ValueException;
 
 trait TAbstractBuilder {
   /** @param Upload|string|array $builder */
-  static function with($builder): IBuilder {
+  static function with($builder, ?array $params=null): IBuilder {
     if ($builder instanceof self) return $builder;
     $class = null;
     if ($builder instanceof Upload) {
       # faire un builder dans le même format que le fichier uploadé
-      if ($builder->isExt(".csv")) $class = CsvBuilder::class;
-      else $class = static::class;
-      return new $class($builder->name);
+      if ($builder->isExt(".csv")) {
+        $class = CsvBuilder::class;
+      } else {
+        $class = static::class;
+        if ($builder->isExt(".ods")) {
+          $params["ss_type"] = "ods";
+        } else {
+          $params["ss_type"] = "xlsx";
+        }
+      }
+      return new $class($builder->name, $params);
     }
-    if (is_string($builder)) $builder = ["output" => $builder];
-    if (!is_array($builder)) {
+
+    if (is_string($builder)) {
+      $params["output"] = $builder;
+    } elseif (is_array($builder)) {
+      $params = cl::merge($builder, $params);
+    } elseif ($builder !== null) {
       throw ValueException::invalid_type($builder, self::class);
     }
-    $input = $builder["output"] ?? null;
-    if (is_string($input) && path::ext($input) === ".csv") {
-      $class = CsvBuilder::class;
+
+    $output = $params["output"] ?? null;
+    $ssType = null;
+    if (is_string($output)) {
+      switch (path::ext($output)) {
+      case ".csv":
+        $class = CsvBuilder::class;
+        break;
+      case ".ods":
+        $ssType = "ods";
+        break;
+      case ".xlsx":
+      default:
+        $ssType = "xlsx";
+        break;
+      }
     }
+    $params["ss_type"] = $ssType;
     if ($class === null) $class = static::class;
-    return new $class(null, $builder);
+    return new $class(null, $params);
   }
 }
diff --git a/src/file/csv/TAbstractReader.php b/src/file/csv/TAbstractReader.php
index b82b70a..b2f56db 100644
--- a/src/file/csv/TAbstractReader.php
+++ b/src/file/csv/TAbstractReader.php
@@ -12,8 +12,16 @@ trait TAbstractReader {
     if ($reader instanceof self) return $reader;
     $class = null;
     if ($reader instanceof Upload) {
-      if ($reader->isExt(".csv")) $class = CsvReader::class;
-      else $class = static::class;
+      if ($reader->isExt(".csv")) {
+        $class = CsvReader::class;
+      } else {
+        $class = static::class;
+        if ($reader->isExt(".ods")) {
+          $params["ss_type"] = "ods";
+        } else {
+          $params["ss_type"] = "xlsx";
+        }
+      }
       return new $class($reader->tmpName, $params);
     }
 
@@ -26,9 +34,22 @@ trait TAbstractReader {
     }
 
     $input = $params["input"] ?? null;
-    if (is_string($input) && path::ext($input) === ".csv") {
-      $class = CsvReader::class;
+    $ssType = null;
+    if (is_string($input)) {
+      switch (path::ext($input)) {
+      case ".csv":
+        $class = CsvReader::class;
+        break;
+      case ".ods":
+        $ssType = "ods";
+        break;
+      case ".xlsx":
+      default:
+        $ssType = "xlsx";
+        break;
+      }
     }
+    $params["ss_type"] = $ssType;
     if ($class === null) $class = static::class;
     return new $class(null, $params);
   }