diff --git a/packages/html-reporter/src/headerView.spec.tsx b/packages/html-reporter/src/headerView.spec.tsx
index 5c05ec1e29..707ba73cc1 100644
--- a/packages/html-reporter/src/headerView.spec.tsx
+++ b/packages/html-reporter/src/headerView.spec.tsx
@@ -28,7 +28,7 @@ test('should render counters', async ({ mount }) => {
     skipped: 10,
     ok: false,
     duration: 100000
-  }} filterText='' setFilterText={() => {}} projectNames={[]}></HeaderView>);
+  }} filterText='' setFilterText={() => {}}></HeaderView>);
   await expect(component.locator('a', { hasText: 'All' }).locator('.counter')).toHaveText('100');
   await expect(component.locator('a', { hasText: 'Passed' }).locator('.counter')).toHaveText('42');
   await expect(component.locator('a', { hasText: 'Failed' }).locator('.counter')).toHaveText('31');
diff --git a/packages/playwright-core/src/server/recorder.ts b/packages/playwright-core/src/server/recorder.ts
index cc9227241a..d2e53e9d62 100644
--- a/packages/playwright-core/src/server/recorder.ts
+++ b/packages/playwright-core/src/server/recorder.ts
@@ -25,6 +25,7 @@ import { Frame } from './frames';
 import { BrowserContext } from './browserContext';
 import { JavaLanguageGenerator } from './recorder/java';
 import { JavaScriptLanguageGenerator } from './recorder/javascript';
+import { JsonlLanguageGenerator } from './recorder/jsonl';
 import { CSharpLanguageGenerator } from './recorder/csharp';
 import { PythonLanguageGenerator } from './recorder/python';
 import * as recorderSource from '../generated/recorderSource';
@@ -406,6 +407,7 @@ class ContextRecorder extends EventEmitter {
       new CSharpLanguageGenerator('mstest'),
       new CSharpLanguageGenerator('nunit'),
       new CSharpLanguageGenerator('library'),
+      new JsonlLanguageGenerator(),
     ]);
     const primaryLanguage = [...languages].find(l => l.id === codegenId);
     if (!primaryLanguage)
diff --git a/packages/playwright-core/src/server/recorder/jsonl.ts b/packages/playwright-core/src/server/recorder/jsonl.ts
new file mode 100644
index 0000000000..636aaae70f
--- /dev/null
+++ b/packages/playwright-core/src/server/recorder/jsonl.ts
@@ -0,0 +1,44 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { asLocator } from '../../utils/isomorphic/locatorGenerators';
+import type { ActionInContext } from './codeGenerator';
+import type { Language, LanguageGenerator, LanguageGeneratorOptions } from './language';
+
+export class JsonlLanguageGenerator implements LanguageGenerator {
+  id = 'jsonl';
+  groupName = '';
+  name = 'JSONL';
+  highlighter = 'javascript' as Language;
+
+  generateAction(actionInContext: ActionInContext): string {
+    const locator = (actionInContext.action as any).selector ? JSON.parse(asLocator('jsonl', (actionInContext.action as any).selector)) : undefined;
+    const entry = {
+      ...actionInContext.action,
+      pageAlias: actionInContext.frame.pageAlias,
+      locator,
+    };
+    return JSON.stringify(entry);
+  }
+
+  generateHeader(options: LanguageGeneratorOptions): string {
+    return JSON.stringify(options);
+  }
+
+  generateFooter(saveStorage: string | undefined): string {
+    return '';
+  }
+}
diff --git a/packages/playwright-core/src/utils/isomorphic/locatorGenerators.ts b/packages/playwright-core/src/utils/isomorphic/locatorGenerators.ts
index 6f0920299e..50d0595f3d 100644
--- a/packages/playwright-core/src/utils/isomorphic/locatorGenerators.ts
+++ b/packages/playwright-core/src/utils/isomorphic/locatorGenerators.ts
@@ -18,7 +18,7 @@ import { escapeWithQuotes, toSnakeCase, toTitleCase } from './stringUtils';
 import { type NestedSelectorBody, parseAttributeSelector, parseSelector, stringifySelector } from './selectorParser';
 import type { ParsedSelector } from './selectorParser';
 
-export type Language = 'javascript' | 'python' | 'java' | 'csharp';
+export type Language = 'javascript' | 'python' | 'java' | 'csharp' | 'jsonl';
 export type LocatorType = 'default' | 'role' | 'text' | 'label' | 'placeholder' | 'alt' | 'title' | 'test-id' | 'nth' | 'first' | 'last' | 'has-text' | 'has-not-text' | 'has' | 'hasNot' | 'frame' | 'and' | 'or';
 export type LocatorBase = 'page' | 'locator' | 'frame-locator';
 
@@ -31,6 +31,7 @@ type LocatorOptions = {
 };
 export interface LocatorFactory {
   generateLocator(base: LocatorBase, kind: LocatorType, body: string | RegExp, options?: LocatorOptions): string;
+  chainLocators(locators: string[]): string;
 }
 
 export function asLocator(lang: Language, selector: string, isFrameLocator: boolean = false, playSafe: boolean = false): string {
@@ -191,7 +192,7 @@ function innerAsLocators(factory: LocatorFactory, parsed: ParsedSelector, isFram
         // Two options:
         // - locator('div').filter({ hasText: 'foo' })
         // - locator('div', { hasText: 'foo' })
-        tokens.push([locatorPart + '.' + nextLocatorPart, combinedPart]);
+        tokens.push([factory.chainLocators([locatorPart, nextLocatorPart]), combinedPart]);
         index++;
         continue;
       }
@@ -200,16 +201,16 @@ function innerAsLocators(factory: LocatorFactory, parsed: ParsedSelector, isFram
     tokens.push([locatorPart]);
   }
 
-  return combineTokens(tokens, maxOutputSize);
+  return combineTokens(factory, tokens, maxOutputSize);
 }
 
-function combineTokens(tokens: string[][], maxOutputSize: number): string[] {
+function combineTokens(factory: LocatorFactory, tokens: string[][], maxOutputSize: number): string[] {
   const currentTokens = tokens.map(() => '');
   const result: string[] = [];
 
   const visit = (index: number) => {
     if (index === tokens.length) {
-      result.push(currentTokens.join('.'));
+      result.push(factory.chainLocators(currentTokens));
       return currentTokens.length < maxOutputSize;
     }
     for (const taken of tokens[index]) {
@@ -301,6 +302,10 @@ export class JavaScriptLocatorFactory implements LocatorFactory {
     }
   }
 
+  chainLocators(locators: string[]): string {
+    return locators.join('.');
+  }
+
   private toCallWithExact(method: string, body: string | RegExp, exact?: boolean) {
     if (isRegExp(body))
       return `${method}(${body})`;
@@ -381,6 +386,10 @@ export class PythonLocatorFactory implements LocatorFactory {
     }
   }
 
+  chainLocators(locators: string[]): string {
+    return locators.join('.');
+  }
+
   private regexToString(body: RegExp) {
     const suffix = body.flags.includes('i') ? ', re.IGNORECASE' : '';
     return `re.compile(r"${body.source.replace(/\\\//, '/').replace(/"/g, '\\"')}"${suffix})`;
@@ -470,6 +479,10 @@ export class JavaLocatorFactory implements LocatorFactory {
     }
   }
 
+  chainLocators(locators: string[]): string {
+    return locators.join('.');
+  }
+
   private regexToString(body: RegExp) {
     const suffix = body.flags.includes('i') ? ', Pattern.CASE_INSENSITIVE' : '';
     return `Pattern.compile(${this.quote(body.source)}${suffix})`;
@@ -553,6 +566,10 @@ export class CSharpLocatorFactory implements LocatorFactory {
     }
   }
 
+  chainLocators(locators: string[]): string {
+    return locators.join('.');
+  }
+
   private regexToString(body: RegExp): string {
     const suffix = body.flags.includes('i') ? ', RegexOptions.IgnoreCase' : '';
     return `new Regex(${this.quote(body.source)}${suffix})`;
@@ -583,11 +600,29 @@ export class CSharpLocatorFactory implements LocatorFactory {
   }
 }
 
+export class JsonlLocatorFactory implements LocatorFactory {
+  generateLocator(base: LocatorBase, kind: LocatorType, body: string | RegExp, options: LocatorOptions = {}): string {
+    return JSON.stringify({
+      kind,
+      body,
+      options,
+    });
+  }
+
+  chainLocators(locators: string[]): string {
+    const objects = locators.map(l => JSON.parse(l));
+    for (let i = 0; i < objects.length - 1; ++i)
+      objects[i].next = objects[i + 1];
+    return JSON.stringify(objects[0]);
+  }
+}
+
 const generators: Record<Language, LocatorFactory> = {
   javascript: new JavaScriptLocatorFactory(),
   python: new PythonLocatorFactory(),
   java: new JavaLocatorFactory(),
   csharp: new CSharpLocatorFactory(),
+  jsonl: new JsonlLocatorFactory(),
 };
 
 function isRegExp(obj: any): obj is RegExp {
diff --git a/packages/recorder/src/recorder.tsx b/packages/recorder/src/recorder.tsx
index 055073bb39..ba6d217ff9 100644
--- a/packages/recorder/src/recorder.tsx
+++ b/packages/recorder/src/recorder.tsx
@@ -165,7 +165,7 @@ function renderSourceOptions(sources: Source[]): React.ReactNode {
   const hasGroup = sources.some(s => s.group);
   if (hasGroup) {
     const groups = new Set(sources.map(s => s.group));
-    return Array.from(groups).map(group => (
+    return [...groups].filter(Boolean).map(group => (
       <optgroup label={group} key={group}>
         {sources.filter(s => s.group === group).map(source => renderOption(source))}
       </optgroup>
diff --git a/packages/recorder/src/recorderTypes.ts b/packages/recorder/src/recorderTypes.ts
index 302164321c..4820a8abee 100644
--- a/packages/recorder/src/recorderTypes.ts
+++ b/packages/recorder/src/recorderTypes.ts
@@ -29,7 +29,7 @@ export type UIState = {
   mode: Mode;
   actionPoint?: Point;
   actionSelector?: string;
-  language: 'javascript' | 'python' | 'java' | 'csharp';
+  language: 'javascript' | 'python' | 'java' | 'csharp' | 'jsonl';
   testIdAttributeName: string;
 };
 
diff --git a/packages/web/src/components/codeMirrorWrapper.tsx b/packages/web/src/components/codeMirrorWrapper.tsx
index f072530f48..c8c96b2fd5 100644
--- a/packages/web/src/components/codeMirrorWrapper.tsx
+++ b/packages/web/src/components/codeMirrorWrapper.tsx
@@ -26,7 +26,7 @@ export type SourceHighlight = {
   message?: string;
 };
 
-export type Language = 'javascript' | 'python' | 'java' | 'csharp';
+export type Language = 'javascript' | 'python' | 'java' | 'csharp' | 'jsonl';
 
 export interface SourceProps {
   text: string;
diff --git a/tests/library/inspector/inspectorTest.ts b/tests/library/inspector/inspectorTest.ts
index 04111a39d6..2b4b790c1d 100644
--- a/tests/library/inspector/inspectorTest.ts
+++ b/tests/library/inspector/inspectorTest.ts
@@ -32,6 +32,7 @@ type CLITestArgs = {
 };
 
 const codegenLang2Id: Map<string, string> = new Map([
+  ['JSON', 'jsonl'],
   ['JavaScript', 'javascript'],
   ['Java', 'java'],
   ['Python', 'python'],