diff --git a/.changeset/seven-wolves-clean.md b/.changeset/seven-wolves-clean.md
new file mode 100644
index 0000000000..3b807b1af6
--- /dev/null
+++ b/.changeset/seven-wolves-clean.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-techdocs': patch
+---
+
+Do not add trailing slash for .html pages during doc links rewriting
diff --git a/plugins/techdocs/src/reader/transformers/rewriteDocLinks.test.ts b/plugins/techdocs/src/reader/transformers/rewriteDocLinks.test.ts
index 01467f665d..4ebd7411ac 100644
--- a/plugins/techdocs/src/reader/transformers/rewriteDocLinks.test.ts
+++ b/plugins/techdocs/src/reader/transformers/rewriteDocLinks.test.ts
@@ -82,6 +82,7 @@ describe('normalizeUrl', () => {
     ['http://example.org/folder#intro', 'http://example.org/folder/#intro'],
     ['http://example.org/folder/#intro', 'http://example.org/folder/#intro'],
     ['http://example.org/folder#', 'http://example.org/folder/#'],
+    ['http://example.org/page.html', 'http://example.org/page.html'],
   ])('should handle %s', (url, expected) => {
     expect(normalizeUrl(url)).toEqual(expected);
   });
diff --git a/plugins/techdocs/src/reader/transformers/rewriteDocLinks.ts b/plugins/techdocs/src/reader/transformers/rewriteDocLinks.ts
index 8c4bc29201..8d8fafa454 100644
--- a/plugins/techdocs/src/reader/transformers/rewriteDocLinks.ts
+++ b/plugins/techdocs/src/reader/transformers/rewriteDocLinks.ts
@@ -58,7 +58,7 @@ export const rewriteDocLinks = (): Transformer => {
 export function normalizeUrl(input: string): string {
   const url = new URL(input);
 
-  if (!url.pathname.endsWith('/')) {
+  if (!url.pathname.endsWith('/') && !url.pathname.endsWith('.html')) {
     url.pathname += '/';
   }