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‎packages/pretty-format/USAGE.md‎
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‎packages/pretty-format/USAGE.md‎
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‎packages/snapshot/src/port/state.ts‎
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‎packages/snapshot/src/port/state.ts‎
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‎test/snapshots/test/options.test.ts‎
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‎test/snapshots/test/options.test.ts‎
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@@ -117,6 +117,9 @@ Snapshots use `@vitest/pretty-format` with snapshot-specific defaults such as:
 - `escapeString: false`
 - `escapeRegex: true`
 - `printFunctionName: false`
+- `maxOutputLength: 2 ** 27`
+
+Snapshots use a more generous safety cap than the package default. The default `maxOutputLength` is tuned for general-purpose formatting such as logs and error messages, while snapshot users may intentionally persist large serialized values to dedicated files. Users can still opt into a smaller cap through `test.snapshotFormat.maxOutputLength`.
 
 Default snapshot plugin stack:
 
 
@@ -112,6 +112,10 @@ export default class SnapshotState {
     this._snapshotFormat = {
       printBasicPrototype: false,
       escapeString: false,
+      // more generous safety cap 128MB (same as Node's util.inspect)
+      // instead of tighter pretty-format default 1MB
+      // since users can purposely save large snapshot to a dedicated file.
+      maxOutputLength: 2 ** 27,
       ...options.snapshotFormat,
     }
     this._environment = options.snapshotEnvironment
 
@@ -0,0 +1,80 @@
+import { describe, expect, test } from 'vitest'
+import { runInlineTests } from '../../test-utils'
+
+describe('maxOutputLength', () => {
+  test('default', async () => {
+    const result = await runInlineTests(
+      {
+        'basic.test.ts': `
+          import { expect, test } from 'vitest'
+
+          test('large snapshot', () => {
+            expect(Array.from({ length: 500_000 }, (_, i) => ({ i }))).toMatchSnapshot()
+          })
+        `,
+      },
+      {
+        update: 'all',
+      },
+    )
+
+    expect(result.stderr).toMatchInlineSnapshot(`""`)
+    const snapshot = result.fs.readFile('__snapshots__/basic.test.ts.snap')
+    expect(snapshot.slice(-50)).toMatchInlineSnapshot(`
+      " "i": 499998,
+        },
+        {
+          "i": 499999,
+        },
+      ]
+      \`;
+      "
+    `)
+    expect(snapshot.length).toMatchInlineSnapshot(`12888992`)
+  })
+
+  test('override', async () => {
+    const result = await runInlineTests(
+      {
+        'basic.test.ts': `
+          import { expect, test } from 'vitest'
+
+          test('large snapshot', () => {
+            expect(Array.from({ length: 8 }, (_, i) => ({ i }))).toMatchSnapshot()
+          })
+        `,
+      },
+      {
+        update: 'all',
+        snapshotFormat: {
+          maxOutputLength: 50,
+        },
+      },
+    )
+
+    expect(result.stderr).toMatchInlineSnapshot(`""`)
+    expect(result.fs.readFile('__snapshots__/basic.test.ts.snap')).toMatchInlineSnapshot(`
+      "// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+      exports[\`large snapshot 1\`] = \`
+      [
+        {
+          "i": 0,
+        },
+        {
+          "i": 1,
+        },
+        {
+          "i": 2,
+        },
+        [Object],
+        [Object],
+        [Object],
+        [Object],
+        [Object],
+      ]
+      \`;
+      "
+    `)
+  })
+})