diff --git a/README.md b/README.md
index bf29c0c..be40372 100644
--- a/README.md
+++ b/README.md
@@ -16,9 +16,9 @@ This package is a PHP client for [Gotenberg](https://gotenberg.dev), a developer
 tools like Chromium and LibreOffice for converting numerous document formats (HTML, Markdown, Word, Excel, etc.) into 
 PDF files, and more!
 
-| Gotenberg version | Client                                                                                            |
-|-------------------|---------------------------------------------------------------------------------------------------|
-| `8.x`               | `v2.x` **(current)**                                                                              |
+| Gotenberg version   | Client                                                                                            |
+|---------------------|---------------------------------------------------------------------------------------------------|
+| `8.x` **(current)** | `v2.x` **(current)**                                                                              |
 | `7.x`               | `v1.x`                                                                                            |
 | `6.x`               | [thecodingmachine/gotenberg-php-client](https://github.com/thecodingmachine/gotenberg-php-client) |
 
@@ -112,6 +112,7 @@ Gotenberg::chromium($apiUrl)
 If the route requires form files, use the `Stream` class to create them:
 
 ```php
+use Gotenberg\DownloadFrom;
 use Gotenberg\Gotenberg;
 use Gotenberg\Stream;
 
@@ -126,6 +127,13 @@ Gotenberg::chromium($apiUrl)
 // Or create your stream from scratch.
 Gotenberg::libreOffice($apiUrl)
     ->convert(new Stream('document.docx', $stream));
+
+// Or even tell Gotenberg to download the files for you.
+Gotenberg::libreOffice($apiUrl)
+    ->downloadFrom([
+        new DownloadFrom('https://url.to.document.docx', ['MyHeader' => 'MyValue'])
+    ])
+    ->convert();
 ```
 
 ## Send a request to the API
diff --git a/src/Modules/ChromiumPdf.php b/src/Modules/ChromiumPdf.php
index b3eacd0..48b7acf 100644
--- a/src/Modules/ChromiumPdf.php
+++ b/src/Modules/ChromiumPdf.php
@@ -201,9 +201,12 @@ public function url(string $url): RequestInterface
      * Note: it automatically sets the index filename to "index.html", as
      * required by Gotenberg.
      */
-    public function html(Stream $index): RequestInterface
+    public function html(Stream|null $index): RequestInterface
     {
-        $this->formFile('index.html', $index->getStream());
+        if ($index !== null) {
+            $this->formFile('index.html', $index->getStream());
+        }
+
         $this->endpoint = '/forms/chromium/convert/html';
 
         return $this->request();
@@ -215,10 +218,11 @@ public function html(Stream $index): RequestInterface
      * Note: it automatically sets the index filename to "index.html", as
      * required by Gotenberg.
      */
-    public function markdown(Stream $index, Stream $markdown, Stream ...$markdowns): RequestInterface
+    public function markdown(Stream|null $index, Stream ...$markdowns): RequestInterface
     {
-        $this->formFile('index.html', $index->getStream());
-        $this->formFile($markdown->getFilename(), $markdown->getStream());
+        if ($index !== null) {
+            $this->formFile('index.html', $index->getStream());
+        }
 
         foreach ($markdowns as $markdown) {
             $this->formFile($markdown->getFilename(), $markdown->getStream());
diff --git a/src/Modules/ChromiumScreenshot.php b/src/Modules/ChromiumScreenshot.php
index f55b918..296faf9 100644
--- a/src/Modules/ChromiumScreenshot.php
+++ b/src/Modules/ChromiumScreenshot.php
@@ -113,9 +113,12 @@ public function url(string $url): RequestInterface
      * Note: it automatically sets the index filename to "index.html", as
      * required by Gotenberg.
      */
-    public function html(Stream $index): RequestInterface
+    public function html(Stream|null $index): RequestInterface
     {
-        $this->formFile('index.html', $index->getStream());
+        if ($index !== null) {
+            $this->formFile('index.html', $index->getStream());
+        }
+
         $this->endpoint = '/forms/chromium/screenshot/html';
 
         return $this->request();
@@ -127,10 +130,11 @@ public function html(Stream $index): RequestInterface
      * Note: it automatically sets the index filename to "index.html", as
      * required by Gotenberg.
      */
-    public function markdown(Stream $index, Stream $markdown, Stream ...$markdowns): RequestInterface
+    public function markdown(Stream|null $index, Stream ...$markdowns): RequestInterface
     {
-        $this->formFile('index.html', $index->getStream());
-        $this->formFile($markdown->getFilename(), $markdown->getStream());
+        if ($index !== null) {
+            $this->formFile('index.html', $index->getStream());
+        }
 
         foreach ($markdowns as $markdown) {
             $this->formFile($markdown->getFilename(), $markdown->getStream());
diff --git a/src/Modules/LibreOffice.php b/src/Modules/LibreOffice.php
index e455a94..58700df 100644
--- a/src/Modules/LibreOffice.php
+++ b/src/Modules/LibreOffice.php
@@ -331,12 +331,9 @@ public function merge(): self
      * Note: if you requested a merge, the merging order is determined by the
      * order of the arguments.
      */
-    public function convert(Stream $file, Stream ...$files): RequestInterface
+    public function convert(Stream ...$files): RequestInterface
     {
-        $index    = $this->index ?? new HrtimeIndex();
-        $filename = $this->merge ? $index->create() . '_' . $file->getFilename() : $file->getFilename();
-        $this->formFile($filename, $file->getStream());
-
+        $index = $this->index ?? new HrtimeIndex();
         foreach ($files as $file) {
             $filename = $this->merge ? $index->create() . '_' . $file->getFilename() : $file->getFilename();
             $this->formFile($filename, $file->getStream());
diff --git a/src/Modules/PdfEngines.php b/src/Modules/PdfEngines.php
index 8faafd2..8b79814 100644
--- a/src/Modules/PdfEngines.php
+++ b/src/Modules/PdfEngines.php
@@ -91,10 +91,9 @@ public function merge(Stream ...$pdfs): RequestInterface
      * Converts PDF(s) to a specific PDF/A format.
      * Gotenberg will return the PDF or a ZIP archive with the PDFs.
      */
-    public function convert(string $pdfa, Stream $pdf, Stream ...$pdfs): RequestInterface
+    public function convert(string $pdfa, Stream ...$pdfs): RequestInterface
     {
         $this->pdfa($pdfa);
-        $this->formFile($pdf->getFilename(), $pdf->getStream());
 
         foreach ($pdfs as $pdf) {
             $this->formFile($pdf->getFilename(), $pdf->getStream());
@@ -109,10 +108,8 @@ public function convert(string $pdfa, Stream $pdf, Stream ...$pdfs): RequestInte
      * Retrieves the metadata of specified PDFs, returning a JSON formatted
      * response with the structure filename => metadata.
      */
-    public function readMetadata(Stream $pdf, Stream ...$pdfs): RequestInterface
+    public function readMetadata(Stream ...$pdfs): RequestInterface
     {
-        $this->formFile($pdf->getFilename(), $pdf->getStream());
-
         foreach ($pdfs as $pdf) {
             $this->formFile($pdf->getFilename(), $pdf->getStream());
         }
@@ -129,10 +126,9 @@ public function readMetadata(Stream $pdf, Stream ...$pdfs): RequestInterface
      *
      * @throws NativeFunctionErrored
      */
-    public function writeMetadata(array $metadata, Stream $pdf, Stream ...$pdfs): RequestInterface
+    public function writeMetadata(array $metadata, Stream ...$pdfs): RequestInterface
     {
         $this->metadata($metadata);
-        $this->formFile($pdf->getFilename(), $pdf->getStream());
 
         foreach ($pdfs as $pdf) {
             $this->formFile($pdf->getFilename(), $pdf->getStream());