diff --git a/crates/typst-pdf/src/extg.rs b/crates/typst-pdf/src/extg.rs
index f7bd116dd..d53954ca2 100644
--- a/crates/typst-pdf/src/extg.rs
+++ b/crates/typst-pdf/src/extg.rs
@@ -23,7 +23,7 @@ impl ExtGState {
 
 /// Embed all used external graphics states into the PDF.
 #[tracing::instrument(skip_all)]
-pub fn write_external_graphics_states(ctx: &mut PdfContext) {
+pub(crate) fn write_external_graphics_states(ctx: &mut PdfContext) {
     for external_gs in ctx.extg_map.items() {
         let id = ctx.alloc.bump();
         ctx.ext_gs_refs.push(id);
diff --git a/crates/typst-pdf/src/font.rs b/crates/typst-pdf/src/font.rs
index ccf2f4032..a358f9ea7 100644
--- a/crates/typst-pdf/src/font.rs
+++ b/crates/typst-pdf/src/font.rs
@@ -22,7 +22,7 @@ const SYSTEM_INFO: SystemInfo = SystemInfo {
 
 /// Embed all used fonts into the PDF.
 #[tracing::instrument(skip_all)]
-pub fn write_fonts(ctx: &mut PdfContext) {
+pub(crate) fn write_fonts(ctx: &mut PdfContext) {
     for font in ctx.font_map.items() {
         let type0_ref = ctx.alloc.bump();
         let cid_ref = ctx.alloc.bump();
diff --git a/crates/typst-pdf/src/gradient.rs b/crates/typst-pdf/src/gradient.rs
index e5cae30e0..37702cea8 100644
--- a/crates/typst-pdf/src/gradient.rs
+++ b/crates/typst-pdf/src/gradient.rs
@@ -32,7 +32,7 @@ pub struct PdfGradient {
 
 /// Writes the actual gradients (shading patterns) to the PDF.
 /// This is performed once after writing all pages.
-pub fn write_gradients(ctx: &mut PdfContext) {
+pub(crate) fn write_gradients(ctx: &mut PdfContext) {
     for PdfGradient { transform, aspect_ratio, gradient, on_text } in
         ctx.gradient_map.items().cloned().collect::<Vec<_>>()
     {
diff --git a/crates/typst-pdf/src/image.rs b/crates/typst-pdf/src/image.rs
index 8d526efd0..95ae97217 100644
--- a/crates/typst-pdf/src/image.rs
+++ b/crates/typst-pdf/src/image.rs
@@ -11,7 +11,7 @@ use crate::{deflate, PdfContext};
 
 /// Embed all used images into the PDF.
 #[tracing::instrument(skip_all)]
-pub fn write_images(ctx: &mut PdfContext) {
+pub(crate) fn write_images(ctx: &mut PdfContext) {
     for image in ctx.image_map.items() {
         // Add the primary image.
         match image.kind() {
diff --git a/crates/typst-pdf/src/lib.rs b/crates/typst-pdf/src/lib.rs
index 92c844954..112b5a7de 100644
--- a/crates/typst-pdf/src/lib.rs
+++ b/crates/typst-pdf/src/lib.rs
@@ -61,7 +61,7 @@ pub fn pdf(
 }
 
 /// Context for exporting a whole PDF document.
-pub struct PdfContext<'a> {
+struct PdfContext<'a> {
     /// The document that we're currently exporting.
     document: &'a Document,
     /// An introspector for the document, used to resolve locations links and
diff --git a/crates/typst-pdf/src/outline.rs b/crates/typst-pdf/src/outline.rs
index e51d85c3f..d17f89489 100644
--- a/crates/typst-pdf/src/outline.rs
+++ b/crates/typst-pdf/src/outline.rs
@@ -9,7 +9,7 @@ use crate::{AbsExt, PdfContext};
 
 /// Construct the outline for the document.
 #[tracing::instrument(skip_all)]
-pub fn write_outline(ctx: &mut PdfContext) -> Option<Ref> {
+pub(crate) fn write_outline(ctx: &mut PdfContext) -> Option<Ref> {
     let mut tree: Vec<HeadingNode> = vec![];
 
     // Stores the level of the topmost skipped ancestor of the next bookmarked
diff --git a/crates/typst-pdf/src/page.rs b/crates/typst-pdf/src/page.rs
index 4de472f0b..c842a01f1 100644
--- a/crates/typst-pdf/src/page.rs
+++ b/crates/typst-pdf/src/page.rs
@@ -25,7 +25,7 @@ use crate::{deflate, AbsExt, EmExt, PdfContext};
 
 /// Construct page objects.
 #[tracing::instrument(skip_all)]
-pub fn construct_pages(ctx: &mut PdfContext, frames: &[Frame]) {
+pub(crate) fn construct_pages(ctx: &mut PdfContext, frames: &[Frame]) {
     for frame in frames {
         construct_page(ctx, frame);
     }
@@ -33,7 +33,7 @@ pub fn construct_pages(ctx: &mut PdfContext, frames: &[Frame]) {
 
 /// Construct a page object.
 #[tracing::instrument(skip_all)]
-pub fn construct_page(ctx: &mut PdfContext, frame: &Frame) {
+pub(crate) fn construct_page(ctx: &mut PdfContext, frame: &Frame) {
     let page_ref = ctx.alloc.bump();
     ctx.page_refs.push(page_ref);
 
@@ -79,7 +79,7 @@ pub fn construct_page(ctx: &mut PdfContext, frame: &Frame) {
 
 /// Write the page tree.
 #[tracing::instrument(skip_all)]
-pub fn write_page_tree(ctx: &mut PdfContext) {
+pub(crate) fn write_page_tree(ctx: &mut PdfContext) {
     for i in 0..ctx.pages.len() {
         write_page(ctx, i);
     }
@@ -194,7 +194,7 @@ fn write_page(ctx: &mut PdfContext, i: usize) {
 
 /// Write the page labels.
 #[tracing::instrument(skip_all)]
-pub fn write_page_labels(ctx: &mut PdfContext) -> Vec<(NonZeroUsize, Ref)> {
+pub(crate) fn write_page_labels(ctx: &mut PdfContext) -> Vec<(NonZeroUsize, Ref)> {
     let mut result = vec![];
     let mut prev: Option<&PdfPageLabel> = None;
 
@@ -265,7 +265,7 @@ pub struct Page {
 
 /// An exporter for the contents of a single PDF page.
 pub struct PageContext<'a, 'b> {
-    pub parent: &'a mut PdfContext<'b>,
+    pub(crate) parent: &'a mut PdfContext<'b>,
     page_ref: Ref,
     label: Option<PdfPageLabel>,
     pub content: Content,