diff --git a/docs/usage/config-presets.md b/docs/usage/config-presets.md
index 28fb2109b51ea5..5f6cadfb20b798 100644
--- a/docs/usage/config-presets.md
+++ b/docs/usage/config-presets.md
@@ -55,6 +55,7 @@ You can set a Git tag (like a SemVer) to use a specific release of your shared c
 | ------------------------------------------- | -------------------------------- | --------- | ---------------------------- | --------------- | -------------- |
 | GitHub default                              | `github>abc/foo`                 | `default` | `https://github.com/abc/foo` | `default.json`  | Default branch |
 | GitHub with preset name                     | `github>abc/foo:xyz`             | `xyz`     | `https://github.com/abc/foo` | `xyz.json`      | Default branch |
+| GitHub with preset name (JSON5)             | `github>abc/foo:xyz.json5`       | `xyz`     | `https://github.com/abc/foo` | `xyz.json5`     | Default branch |
 | GitHub default with a tag                   | `github>abc/foo#1.5.4`           | `default` | `https://github.com/abc/foo` | `default.json`  | `1.5.4`        |
 | GitHub with preset name with a tag          | `github>abc/foo:xyz#1.5.4`       | `xyz`     | `https://github.com/abc/foo` | `xyz.json`      | `1.5.4`        |
 | GitHub with preset name and path with a tag | `github>abc/foo//path/xyz#1.5.4` | `xyz`     | `https://github.com/abc/foo` | `path/xyz.json` | `1.5.4`        |
@@ -66,6 +67,7 @@ You can set a Git tag (like a SemVer) to use a specific release of your shared c
 | ------------------------------------------- | -------------------------------- | --------- | ---------------------------- | --------------- | -------------- |
 | GitLab default                              | `gitlab>abc/foo`                 | `default` | `https://gitlab.com/abc/foo` | `default.json`  | Default branch |
 | GitLab with preset name                     | `gitlab>abc/foo:xyz`             | `xyz`     | `https://gitlab.com/abc/foo` | `xyz.json`      | Default branch |
+| GitLab with preset name (JSON5)             | `gitlab>abc/foo:xyz.json5`       | `xyz`     | `https://gitlab.com/abc/foo` | `xyz.json5`     | Default branch |
 | GitLab default with a tag                   | `gitlab>abc/foo#1.5.4`           | `default` | `https://gitlab.com/abc/foo` | `default.json`  | `1.5.4`        |
 | GitLab with preset name with a tag          | `gitlab>abc/foo:xyz#1.5.4`       | `xyz`     | `https://gitlab.com/abc/foo` | `xyz.json`      | `1.5.4`        |
 | GitLab with preset name and path with a tag | `gitlab>abc/foo//path/xyz#1.5.4` | `xyz`     | `https://gitlab.com/abc/foo` | `path/xyz.json` | `1.5.4`        |
@@ -77,6 +79,7 @@ You can set a Git tag (like a SemVer) to use a specific release of your shared c
 | ------------------------------------------ | ------------------------------- | --------- | --------------------------- | --------------- | -------------- |
 | Gitea default                              | `gitea>abc/foo`                 | `default` | `https://gitea.com/abc/foo` | `default.json`  | Default branch |
 | Gitea with preset name                     | `gitea>abc/foo:xyz`             | `xyz`     | `https://gitea.com/abc/foo` | `xyz.json`      | Default branch |
+| Gitea with preset name (JSON5)             | `gitea>abc/foo:xyz.json5`       | `xyz`     | `https://gitea.com/abc/foo` | `xyz.json5`     | Default branch |
 | Gitea default with a tag                   | `gitea>abc/foo#1.5.4`           | `default` | `https://gitea.com/abc/foo` | `default.json`  | `1.5.4`        |
 | Gitea with preset name with a tag          | `gitea>abc/foo:xyz#1.5.4`       | `xyz`     | `https://gitea.com/abc/foo` | `xyz.json`      | `1.5.4`        |
 | Gitea with preset name and path with a tag | `gitea>abc/foo//path/xyz#1.5.4` | `xyz`     | `https://gitea.com/abc/foo` | `path/xyz.json` | `1.5.4`        |
@@ -88,6 +91,7 @@ You can set a Git tag (like a SemVer) to use a specific release of your shared c
 | ------------------------------------------ | ------------------------------- | --------- | ------------------------------------ | --------------- | -------------- |
 | Local default                              | `local>abc/foo`                 | `default` | `https://github.company.com/abc/foo` | `default.json`  | Default branch |
 | Local with preset path                     | `local>abc/foo:xyz`             | `xyz`     | `https://github.company.com/abc/foo` | `xyz.json`      | Default branch |
+| Local with preset path (JSON5)             | `local>abc/foo:xyz.json5`       | `xyz`     | `https://github.company.com/abc/foo` | `xyz.json5`     | Default branch |
 | Local default with a tag                   | `local>abc/foo#1.5.4`           | `default` | `https://github.company.com/abc/foo` | `default.json`  | `1.5.4`        |
 | Local with preset name with a tag          | `local>abc/foo:xyz#1.5.4`       | `xyz`     | `https://github.company.com/abc/foo` | `xyz.json`      | `1.5.4`        |
 | Local with preset name and path with a tag | `local>abc/foo//path/xyz#1.5.4` | `xyz`     | `https://github.company.com/abc/foo` | `path/xyz.json` | `1.5.4`        |
diff --git a/lib/config/presets/bitbucket-server/index.spec.ts b/lib/config/presets/bitbucket-server/index.spec.ts
index 000e1a23703f29..a0d30d6b596469 100644
--- a/lib/config/presets/bitbucket-server/index.spec.ts
+++ b/lib/config/presets/bitbucket-server/index.spec.ts
@@ -35,6 +35,24 @@ describe('config/presets/bitbucket-server/index', () => {
       expect(res).toEqual({ from: 'api' });
     });
 
+    it('returns JSON5', async () => {
+      httpMock
+        .scope(bitbucketApiHost)
+        .get(`${basePath}/some-filename.json5`)
+        .query({ limit: 20000 })
+        .reply(200, {
+          isLastPage: true,
+          lines: [{ text: '{from:"api"' }, { text: '}' }],
+        });
+
+      const res = await bitbucketServer.fetchJSONFile(
+        'some/repo',
+        'some-filename.json5',
+        bitbucketApiHost
+      );
+      expect(res).toEqual({ from: 'api' });
+    });
+
     it('handles branches/tags', async () => {
       httpMock
         .scope(bitbucketApiHost)
diff --git a/lib/config/presets/gitea/index.spec.ts b/lib/config/presets/gitea/index.spec.ts
index dd38faa217fe34..98a7d0c609f930 100644
--- a/lib/config/presets/gitea/index.spec.ts
+++ b/lib/config/presets/gitea/index.spec.ts
@@ -36,6 +36,23 @@ describe('config/presets/gitea/index', () => {
       );
       expect(res).toEqual({ from: 'api' });
     });
+
+    it('returns JSON5', async () => {
+      httpMock
+        .scope(giteaApiHost)
+        .get(`${basePath}/some-filename.json5`)
+        .reply(200, {
+          content: toBase64('{from:"api"}'),
+        });
+
+      const res = await gitea.fetchJSONFile(
+        'some/repo',
+        'some-filename.json5',
+        giteaApiHost,
+        null
+      );
+      expect(res).toEqual({ from: 'api' });
+    });
   });
 
   describe('getPreset()', () => {
diff --git a/lib/config/presets/github/index.spec.ts b/lib/config/presets/github/index.spec.ts
index 7df7244d062921..93ef768c1971f9 100644
--- a/lib/config/presets/github/index.spec.ts
+++ b/lib/config/presets/github/index.spec.ts
@@ -98,6 +98,34 @@ describe('config/presets/github/index', () => {
       expect(content).toEqual({ foo: 'bar' });
     });
 
+    it('should query preset within the file when .json extension provided', async () => {
+      httpMock
+        .scope(githubApiHost)
+        .get(`${basePath}/somefile.json`)
+        .reply(200, {
+          content: toBase64('{"foo":"bar"}'),
+        });
+      const content = await github.getPreset({
+        repo: 'some/repo',
+        presetName: 'somefile.json',
+      });
+      expect(content).toEqual({ foo: 'bar' });
+    });
+
+    it('should query preset within the file when .json5 extension provided', async () => {
+      httpMock
+        .scope(githubApiHost)
+        .get(`${basePath}/somefile.json5`)
+        .reply(200, {
+          content: toBase64('{foo:"bar"}'),
+        });
+      const content = await github.getPreset({
+        repo: 'some/repo',
+        presetName: 'somefile.json5',
+      });
+      expect(content).toEqual({ foo: 'bar' });
+    });
+
     it('should query subpreset', async () => {
       httpMock
         .scope(githubApiHost)
diff --git a/lib/config/presets/gitlab/index.spec.ts b/lib/config/presets/gitlab/index.spec.ts
index 6ab2e65dede2bc..0e69c42a554446 100644
--- a/lib/config/presets/gitlab/index.spec.ts
+++ b/lib/config/presets/gitlab/index.spec.ts
@@ -93,6 +93,54 @@ describe('config/presets/gitlab/index', () => {
       });
       expect(content).toEqual({ foo: 'bar' });
     });
+
+    it('should query custom paths with .json extension', async () => {
+      httpMock
+        .scope(gitlabApiHost)
+        .get(`${basePath}/branches`)
+        .reply(200, [
+          {
+            name: 'devel',
+          },
+          {
+            name: 'master',
+            default: true,
+          },
+        ])
+        .get(`${basePath}/files/path%2Fcustom.json/raw?ref=master`)
+        .reply(200, { foo: 'bar' }, {});
+
+      const content = await gitlab.getPreset({
+        repo: 'some/repo',
+        presetPath: 'path',
+        presetName: 'custom.json',
+      });
+      expect(content).toEqual({ foo: 'bar' });
+    });
+
+    it('should query custom paths with .json5 extension', async () => {
+      httpMock
+        .scope(gitlabApiHost)
+        .get(`${basePath}/branches`)
+        .reply(200, [
+          {
+            name: 'devel',
+          },
+          {
+            name: 'master',
+            default: true,
+          },
+        ])
+        .get(`${basePath}/files/path%2Fcustom.json5/raw?ref=master`)
+        .reply(200, { foo: 'bar' }, {});
+
+      const content = await gitlab.getPreset({
+        repo: 'some/repo',
+        presetPath: 'path',
+        presetName: 'custom.json5',
+      });
+      expect(content).toEqual({ foo: 'bar' });
+    });
   });
 
   describe('getPresetFromEndpoint()', () => {
diff --git a/lib/config/presets/index.spec.ts b/lib/config/presets/index.spec.ts
index 6fa528c27b99e5..842f2e02af0c0d 100644
--- a/lib/config/presets/index.spec.ts
+++ b/lib/config/presets/index.spec.ts
@@ -391,6 +391,54 @@ describe('config/presets/index', () => {
       });
     });
 
+    it('parses github file with preset name with .json extension', () => {
+      expect(presets.parsePreset('github>some/repo:somefile.json')).toEqual({
+        repo: 'some/repo',
+        params: undefined,
+        presetName: 'somefile.json',
+        presetPath: undefined,
+        presetSource: 'github',
+        tag: undefined,
+      });
+    });
+
+    it('parses github file with preset name with .json5 extension', () => {
+      expect(presets.parsePreset('github>some/repo:somefile.json5')).toEqual({
+        repo: 'some/repo',
+        params: undefined,
+        presetName: 'somefile.json5',
+        presetPath: undefined,
+        presetSource: 'github',
+        tag: undefined,
+      });
+    });
+
+    it('parses github subfiles with preset name with .json extension', () => {
+      expect(
+        presets.parsePreset('github>some/repo:somefile.json/somepreset')
+      ).toEqual({
+        repo: 'some/repo',
+        params: undefined,
+        presetName: 'somefile.json/somepreset',
+        presetPath: undefined,
+        presetSource: 'github',
+        tag: undefined,
+      });
+    });
+
+    it('parses github subfiles with preset name with .json5 extension', () => {
+      expect(
+        presets.parsePreset('github>some/repo:somefile.json5/somepreset')
+      ).toEqual({
+        repo: 'some/repo',
+        params: undefined,
+        presetName: 'somefile.json5/somepreset',
+        presetPath: undefined,
+        presetSource: 'github',
+        tag: undefined,
+      });
+    });
+
     it('parses github subfiles with preset and sub-preset name', () => {
       expect(
         presets.parsePreset(
diff --git a/lib/config/presets/util.ts b/lib/config/presets/util.ts
index 3ada40a587ea92..270da8757e5ff7 100644
--- a/lib/config/presets/util.ts
+++ b/lib/config/presets/util.ts
@@ -1,5 +1,6 @@
 import JSON5 from 'json5';
 import { logger } from '../../logger';
+import { regEx } from '../../util/regex';
 import { ensureTrailingSlash } from '../../util/url';
 import type { FetchPresetConfig, Preset } from './types';
 
@@ -51,7 +52,9 @@ export async function fetchPreset({
   } else {
     jsonContent = await fetch(
       repo,
-      buildFilePath(`${fileName}.json`),
+      buildFilePath(
+        regEx(/\.json5?$/).test(fileName) ? fileName : `${fileName}.json`
+      ),
       endpoint,
       tag
     );