diff --git a/.changeset/grumpy-trains-juggle.md b/.changeset/grumpy-trains-juggle.md
new file mode 100644
index 0000000000..91ba37b72a
--- /dev/null
+++ b/.changeset/grumpy-trains-juggle.md
@@ -0,0 +1,5 @@
+---
+'@backstage/techdocs-common': patch
+---
+
+Fix bug where binary files (`png`, etc.) could not load when using AWS or GCS publisher.
diff --git a/packages/techdocs-common/src/stages/publish/awsS3.ts b/packages/techdocs-common/src/stages/publish/awsS3.ts
index 15ff33408a..a17bd25011 100644
--- a/packages/techdocs-common/src/stages/publish/awsS3.ts
+++ b/packages/techdocs-common/src/stages/publish/awsS3.ts
@@ -186,7 +186,7 @@ export class AwsS3Publish implements PublisherBase {
           fileStreamChunks.push(chunk);
         })
         .on('end', () => {
-          const fileContent = Buffer.concat(fileStreamChunks).toString();
+          const fileContent = Buffer.concat(fileStreamChunks);
           // Inject response headers
           for (const [headerKey, headerValue] of Object.entries(
             responseHeaders,
diff --git a/packages/techdocs-common/src/stages/publish/googleStorage.ts b/packages/techdocs-common/src/stages/publish/googleStorage.ts
index b33e2bfbe0..12a92aeb53 100644
--- a/packages/techdocs-common/src/stages/publish/googleStorage.ts
+++ b/packages/techdocs-common/src/stages/publish/googleStorage.ts
@@ -184,7 +184,7 @@ export class GoogleGCSPublish implements PublisherBase {
           fileStreamChunks.push(chunk);
         })
         .on('end', () => {
-          const fileContent = Buffer.concat(fileStreamChunks).toString();
+          const fileContent = Buffer.concat(fileStreamChunks);
           // Inject response headers
           for (const [headerKey, headerValue] of Object.entries(
             responseHeaders,