diff --git a/docs/guide/reporters.md b/docs/guide/reporters.md
index 95612f070..72a86146e 100644
--- a/docs/guide/reporters.md
+++ b/docs/guide/reporters.md
@@ -417,6 +417,20 @@ Example of a JSON report:
 Since Vitest 3, the JSON reporter includes coverage information in `coverageMap` if coverage is enabled.
 :::
 
+The `meta` field in each assertion result can be filtered via the `filterMeta` reporter option. It receives the key and value of each field and should return a falsy value to exclude the field from the report:
+
+```ts
+export default defineConfig({
+  test: {
+    reporters: [
+      ['json', {
+        filterMeta: (key, value) => key !== 'internalField',
+      }]
+    ]
+  },
+})
+```
+
 ### HTML Reporter
 
 Generates an HTML file to view test results through an interactive [GUI](/guide/ui). After the file has been generated, Vitest will keep a local development server running and provide a link to view the report in a browser.
diff --git a/packages/vitest/src/node/reporters/json.ts b/packages/vitest/src/node/reporters/json.ts
index 11f71f7ee..1b63f17cc 100644
--- a/packages/vitest/src/node/reporters/json.ts
+++ b/packages/vitest/src/node/reporters/json.ts
@@ -74,6 +74,8 @@ export interface JsonTestResults {
 
 export interface JsonOptions {
   outputFile?: string
+  /** @experimental */
+  filterMeta?: (key: string, value: unknown) => unknown
 }
 
 export class JsonReporter implements Reporter {
@@ -121,6 +123,7 @@ export class JsonReporter implements Reporter {
     const testResults: Array<JsonTestResult> = []
 
     const success = !!(files.length > 0 || this.ctx.config.passWithNoTests) && numFailedTestSuites === 0 && numFailedTests === 0
+    const { filterMeta } = this.options
 
     for (const file of files) {
       const tests = getTests([file])
@@ -161,7 +164,18 @@ export class JsonReporter implements Reporter {
           failureMessages:
             t.result?.errors?.map(e => e.stack || e.message) || [],
           location: t.location,
-          meta: t.meta,
+          meta: filterMeta
+            ? (() => {
+                const filtered: Record<string, unknown> = {}
+                for (const key in t.meta) {
+                  const value = t.meta[key as keyof TaskMeta]
+                  if (filterMeta(key, value)) {
+                    filtered[key] = value
+                  }
+                }
+                return filtered
+              })()
+            : t.meta,
           tags: t.tags || [],
         } satisfies JsonAssertionResult
       })
diff --git a/test/cli/fixtures/reporters/json-meta.test.ts b/test/cli/fixtures/reporters/json-meta.test.ts
new file mode 100644
index 000000000..2599908b5
--- /dev/null
+++ b/test/cli/fixtures/reporters/json-meta.test.ts
@@ -0,0 +1,5 @@
+import { expect, test } from 'vitest'
+
+test('pass', ({ task }) => {
+  task.meta.custom = 'Passing test added this'
+})
diff --git a/test/cli/test/reporters/json.test.ts b/test/cli/test/reporters/json.test.ts
index f718712a0..ee9864a64 100644
--- a/test/cli/test/reporters/json.test.ts
+++ b/test/cli/test/reporters/json.test.ts
@@ -138,4 +138,35 @@ describe('json reporter', async () => {
     expect(data.testResults).toHaveLength(1)
     expect(data.testResults[0].status).toBe(expected)
   })
+
+  it('includes all meta fields when filterMeta is not set', async () => {
+    const { stdout } = await runVitest({
+      reporters: 'json',
+      root,
+      include: ['**/json-meta.test.ts'],
+    })
+
+    const data = JSON.parse(stdout)
+    const results = data.testResults[0].assertionResults
+    const passing = results.find((r: any) => r.title === 'pass')
+
+    expect(passing.meta).toEqual({ custom: 'Passing test added this' })
+  })
+
+  it('filterMeta filters meta fields by key', async () => {
+    const { stdout } = await runVitest({
+      reporters: [['json', {
+        filterMeta: key => key !== 'custom',
+      }]],
+      root,
+      include: ['**/json-meta.test.ts'],
+    })
+
+    const data = JSON.parse(stdout)
+    const results = data.testResults[0].assertionResults
+
+    for (const result of results) {
+      expect(result.meta).toEqual({})
+    }
+  })
 })