diff --git a/README.md b/README.md
index b7e7681..97fb8ee 100644
--- a/README.md
+++ b/README.md
@@ -89,6 +89,9 @@ _Supported Deno verisons:_ **^1.40.0**
     - [Zod](#zod)
       - [zodModel()](#zodmodel)
       - [Kv-Schemas](#kv-schemas)
+  - [Migrate](#migrate)
+    - [Script](#script)
+    - [Function](#function)
   - [Blob Storage](#blob-storage)
   - [Development](#development)
   - [License](#license)
@@ -1289,6 +1292,38 @@ const PostSchema = z.object({
 })
 ```
 
+## Migrate
+
+A helper script and function for migrating entries from a source KV instance to
+a target KV instance. Only migrates `kvdex` entries by default, but optionally
+allows for migrating all entries.
+
+### Script
+
+Run the migrate script and provide --source and --target arguments. Optionally
+pass --all to migrate all entries.
+
+```console
+deno run -A --unstable-kv jsr:@olli/kvdex/ext/migrate --source=./source.sqlite3 --target=./target.sqlite3
+```
+
+### Function
+
+Use the migrate function and pass a source KV instance and a target KV instance.
+Optionally pass `all: true` to migrate all entries.
+
+```ts
+import { migrate } from "jsr:@olli/kvdex/ext/migrate"
+
+const source = await Deno.openKv("./source.sqlite3")
+const target = await Deno.openKv("./target.sqlite3")
+
+await migrate({
+  source,
+  target,
+})
+```
+
 ## Blob Storage
 
 To store large blob sizes, and bypass the data limit of a single atomic
diff --git a/deno.json b/deno.json
index 211bf08..a4daf9b 100644
--- a/deno.json
+++ b/deno.json
@@ -1,9 +1,10 @@
 {
   "name": "@olli/kvdex",
-  "version": "0.34.1",
+  "version": "0.34.2",
   "exports": {
     ".": "./mod.ts",
-    "./ext/zod": "./ext/zod.ts"
+    "./ext/zod": "./ext/zod.ts",
+    "./ext/migrate": "./ext/migrate.ts"
   },
   "imports": {
     "assert": "jsr:@std/assert@0.215/assert",
@@ -13,6 +14,7 @@
     "ulid": "jsr:@std/ulid@0.215",
     "concat": "jsr:@std/bytes@0.215/concat",
     "deep_merge": "jsr:@std/collections@0.215/deep_merge",
+    "parse_args": "jsr:@std/cli@0.215/parse_args",
     "zlib": "node:zlib",
     "zod": "npm:zod@3"
   },
diff --git a/deno.lock b/deno.lock
index 1c2a96f..1e46695 100644
--- a/deno.lock
+++ b/deno.lock
@@ -3,7 +3,9 @@
   "packages": {
     "specifiers": {
       "jsr:@std/assert@0.215": "jsr:@std/assert@0.215.0",
+      "jsr:@std/assert@^0.215.0": "jsr:@std/assert@0.215.0",
       "jsr:@std/bytes@0.215": "jsr:@std/bytes@0.215.0",
+      "jsr:@std/cli@0.215": "jsr:@std/cli@0.215.0",
       "jsr:@std/collections@0.215": "jsr:@std/collections@0.215.0",
       "jsr:@std/fmt@^0.215.0": "jsr:@std/fmt@0.215.0",
       "jsr:@std/ulid@0.215": "jsr:@std/ulid@0.215.0",
@@ -18,6 +20,11 @@
         ]
       },
       "@std/bytes@0.215.0": {},
+      "@std/cli@0.215.0": {
+        "dependencies": [
+          "jsr:@std/assert@^0.215.0"
+        ]
+      },
       "@std/collections@0.215.0": {},
       "@std/fmt@0.215.0": {},
       "@std/ulid@0.215.0": {}
@@ -84,6 +91,7 @@
     "https://jsr.io/@std/assert/0.215.0/unimplemented.ts": "ed3115f6fb271277e0522f3b18f020259900c385e3fa986f109a519a1cf25763",
     "https://jsr.io/@std/assert/0.215.0/unreachable.ts": "1e748f69f73c57f4de9ba1dba39306b86e0ad2c0915975608519a2bcf42c262f",
     "https://jsr.io/@std/bytes/0.215.0/concat.ts": "8142a1734fd445582be0d209d0def43c2a3c27370a0fd4b327187dd34b98d6eb",
+    "https://jsr.io/@std/cli/0.215.0/parse_args.ts": "909c47399d2bc60c0007540e15f90ca3f985642dcd1f4127f817924f704e7b08",
     "https://jsr.io/@std/collections/0.215.0/_utils.ts": "fc59674548a4dd9f5c3cc4f99f9c264aa521a52c1a4ff56b0263713e57e79206",
     "https://jsr.io/@std/collections/0.215.0/deep_merge.ts": "23863106aa1ac392347204fc4d234addee9788d54c89174cf1d841541a320895",
     "https://jsr.io/@std/fmt/0.215.0/colors.ts": "59b5de7c07cdc0322ed61b2d98da1ca4fbc9f576d45c2beee577a27556e52d63",
@@ -94,6 +102,7 @@
     "dependencies": [
       "jsr:@std/assert@0.215",
       "jsr:@std/bytes@0.215",
+      "jsr:@std/cli@0.215",
       "jsr:@std/collections@0.215",
       "jsr:@std/ulid@0.215",
       "npm:zod@3"
diff --git a/ext/migrate.ts b/ext/migrate.ts
new file mode 100644
index 0000000..7488473
--- /dev/null
+++ b/ext/migrate.ts
@@ -0,0 +1,63 @@
+import { parseArgs } from "parse_args"
+import { KVDEX_KEY_PREFIX } from "../src/constants.ts"
+
+if (import.meta.main) {
+  const { source, target, all } = parseArgs(Deno.args, {
+    string: ["source", "target"],
+    boolean: ["all"],
+  })
+
+  if (!source) {
+    console.log(
+      "A source KV path to export from must be provided using the --source argument",
+    )
+    Deno.exit()
+  }
+
+  if (!target) {
+    console.log(
+      "A target KV path to export to must be provided using the --target argument",
+    )
+    Deno.exit()
+  }
+
+  using sourceKv = await Deno.openKv(source)
+  using targetKv = await Deno.openKv(target)
+
+  await migrate({
+    source: sourceKv,
+    target: targetKv,
+    all,
+  })
+}
+
+export type MigrateOptions = {
+  /** Source KV. */
+  source: Deno.Kv
+
+  /** Target KV. */
+  target: Deno.Kv
+
+  /**
+   * Flag indicating whether to migrate all entries or only kvdex specific entries.
+   *
+   * @default false
+   */
+  all?: boolean
+}
+
+/**
+ * Migrate entries from a source KV instance to a target KV instance.
+ *
+ * @param options - Migrate options
+ */
+export async function migrate({
+  source,
+  target,
+  all,
+}: MigrateOptions): Promise<void> {
+  const iter = source.list({ prefix: all ? [] : [KVDEX_KEY_PREFIX] })
+  for await (const { key, value } of iter) {
+    await target.set(key, value)
+  }
+}
diff --git a/tests/ext/migrate.test.ts b/tests/ext/migrate.test.ts
new file mode 100644
index 0000000..9bc2887
--- /dev/null
+++ b/tests/ext/migrate.test.ts
@@ -0,0 +1,646 @@
+import { migrate } from "../../ext/migrate.ts"
+import { collection } from "../../src/collection.ts"
+import { kvdex } from "../../src/kvdex.ts"
+import { model } from "../../src/model.ts"
+import { assert } from "jsr:@std/assert@0.215/assert"
+import { assertEquals } from "assert_equals"
+import {
+  val1,
+  val10,
+  val11,
+  val12,
+  val13,
+  val14,
+  val15,
+  val16,
+  val17,
+  val18,
+  val19,
+  val2,
+  val20,
+  val21,
+  val22,
+  val23,
+  val24,
+  val25,
+  val26,
+  val27,
+  val28,
+  val29,
+  val3,
+  val4,
+  val5,
+  val6,
+  val7,
+  val8,
+  val9,
+} from "../values.ts"
+
+function createDb(kv: Deno.Kv) {
+  return kvdex(kv, {
+    c1: collection(model<typeof val1>()),
+    c2: collection(model<typeof val2>()),
+    c3: collection(model<typeof val3>()),
+    c4: collection(model<typeof val4>()),
+    c5: collection(model<typeof val5>()),
+    c6: collection(model<typeof val6>()),
+    c7: collection(model<typeof val7>()),
+    c8: collection(model<typeof val8>()),
+    c9: collection(model<typeof val9>()),
+    c10: collection(model<typeof val10>()),
+    c11: collection(model<typeof val11>()),
+    c12: collection(model<typeof val12>()),
+    c13: collection(model<typeof val13>()),
+    c14: collection(model<typeof val14>()),
+    c15: collection(model<typeof val15>()),
+    c16: collection(model<typeof val16>()),
+    c17: collection(model<typeof val17>()),
+    c18: collection(model<typeof val18>()),
+    c19: collection(model<typeof val19>()),
+    c20: collection(model<typeof val20>()),
+    c21: collection(model<typeof val21>()),
+    c22: collection(model<typeof val22>()),
+    c23: collection(model<typeof val23>()),
+    c24: collection(model<typeof val24>()),
+    c25: collection(model<typeof val25>()),
+    c26: collection(model<typeof val26>()),
+    c27: collection(model<typeof val27>()),
+    c28: collection(model<typeof val28>()),
+    c29: collection(model<typeof val29>()),
+    s1: collection(model<typeof val1>(), { serialize: "json" }),
+    s2: collection(model<typeof val2>(), { serialize: "json" }),
+    s3: collection(model<typeof val3>(), { serialize: "json" }),
+    s4: collection(model<typeof val4>(), { serialize: "json" }),
+    s5: collection(model<typeof val5>(), { serialize: "json" }),
+    s6: collection(model<typeof val6>(), { serialize: "json" }),
+    s7: collection(model<typeof val7>(), { serialize: "json" }),
+    s8: collection(model<typeof val8>(), { serialize: "json" }),
+    s9: collection(model<typeof val9>(), { serialize: "json" }),
+    s10: collection(model<typeof val10>(), { serialize: "json" }),
+    s11: collection(model<typeof val11>(), { serialize: "json" }),
+    s12: collection(model<typeof val12>(), { serialize: "json" }),
+    s13: collection(model<typeof val13>(), { serialize: "json" }),
+    s14: collection(model<typeof val14>(), { serialize: "json" }),
+    s15: collection(model<typeof val15>(), { serialize: "json" }),
+    s16: collection(model<typeof val16>(), { serialize: "json" }),
+    s17: collection(model<typeof val17>(), { serialize: "json" }),
+    s18: collection(model<typeof val18>(), { serialize: "json" }),
+    s19: collection(model<typeof val19>(), { serialize: "json" }),
+    s20: collection(model<typeof val20>(), { serialize: "json" }),
+    s21: collection(model<typeof val21>(), { serialize: "json" }),
+    s22: collection(model<typeof val22>(), { serialize: "json" }),
+    s23: collection(model<typeof val23>(), { serialize: "json" }),
+    s24: collection(model<typeof val24>(), { serialize: "json" }),
+    s25: collection(model<typeof val25>(), { serialize: "json" }),
+    s26: collection(model<typeof val26>(), { serialize: "json" }),
+    s27: collection(model<typeof val27>(), { serialize: "json" }),
+    s28: collection(model<typeof val28>(), { serialize: "json" }),
+    s29: collection(model<typeof val29>(), { serialize: "json" }),
+    i: collection(model<typeof val27>(), {
+      indices: { val5: "primary", val6: "secondary" },
+    }),
+    is: collection(model<typeof val27>(), {
+      serialize: "json",
+      indices: { val5: "primary", val6: "secondary" },
+    }),
+  })
+}
+
+Deno.test("ext - migrate", async (t) => {
+  await t.step("Should only migrate kvdex entries", async () => {
+    const temp = await Deno.makeTempFile({ suffix: ".sqlite3" })
+    using sourceKv = await Deno.openKv(":memory:")
+    using targetKv = await Deno.openKv(temp)
+
+    await sourceKv.set(["check"], "check")
+
+    const sourceDb = createDb(sourceKv)
+
+    const c1_cr = await sourceDb.c1.add(val1)
+    const c2_cr = await sourceDb.c2.add(val2)
+    const c3_cr = await sourceDb.c3.add(val3)
+    const c4_cr = await sourceDb.c4.add(val4)
+    const c5_cr = await sourceDb.c5.add(val5)
+    const c6_cr = await sourceDb.c6.add(val6)
+    const c7_cr = await sourceDb.c7.add(val7)
+    const c8_cr = await sourceDb.c8.add(val8)
+    const c9_cr = await sourceDb.c9.add(val9)
+    const c10_cr = await sourceDb.c10.add(val10)
+    const c11_cr = await sourceDb.c11.add(val11)
+    const c12_cr = await sourceDb.c12.add(val12)
+    const c13_cr = await sourceDb.c13.add(val13)
+    const c14_cr = await sourceDb.c14.add(val14)
+    const c15_cr = await sourceDb.c15.add(val15)
+    const c16_cr = await sourceDb.c16.add(val16)
+    const c17_cr = await sourceDb.c17.add(val17)
+    const c18_cr = await sourceDb.c18.add(val18)
+    const c19_cr = await sourceDb.c19.add(val19)
+    const c20_cr = await sourceDb.c20.add(val20)
+    const c21_cr = await sourceDb.c21.add(val21)
+    const c22_cr = await sourceDb.c22.add(val22)
+    const c23_cr = await sourceDb.c23.add(val23)
+    const c24_cr = await sourceDb.c24.add(val24)
+    const c25_cr = await sourceDb.c25.add(val25)
+    const c26_cr = await sourceDb.c26.add(val26)
+    const c27_cr = await sourceDb.c27.add(val27)
+    const c28_cr = await sourceDb.c28.add(val28)
+    const c29_cr = await sourceDb.c29.add(val29)
+    const s1_cr = await sourceDb.s1.add(val1)
+    const s2_cr = await sourceDb.s2.add(val2)
+    const s3_cr = await sourceDb.s3.add(val3)
+    const s4_cr = await sourceDb.s4.add(val4)
+    const s5_cr = await sourceDb.s5.add(val5)
+    const s6_cr = await sourceDb.s6.add(val6)
+    const s7_cr = await sourceDb.s7.add(val7)
+    const s8_cr = await sourceDb.s8.add(val8)
+    const s9_cr = await sourceDb.s9.add(val9)
+    const s10_cr = await sourceDb.s10.add(val10)
+    const s11_cr = await sourceDb.s11.add(val11)
+    const s12_cr = await sourceDb.s12.add(val12)
+    const s13_cr = await sourceDb.s13.add(val13)
+    const s14_cr = await sourceDb.s14.add(val14)
+    const s15_cr = await sourceDb.s15.add(val15)
+    const s16_cr = await sourceDb.s16.add(val16)
+    const s17_cr = await sourceDb.s17.add(val17)
+    const s18_cr = await sourceDb.s18.add(val18)
+    const s19_cr = await sourceDb.s19.add(val19)
+    const s20_cr = await sourceDb.s20.add(val20)
+    const s21_cr = await sourceDb.s21.add(val21)
+    const s22_cr = await sourceDb.s22.add(val22)
+    const s23_cr = await sourceDb.s23.add(val23)
+    const s24_cr = await sourceDb.s24.add(val24)
+    const s25_cr = await sourceDb.s25.add(val25)
+    const s26_cr = await sourceDb.s26.add(val26)
+    const s27_cr = await sourceDb.s27.add(val27)
+    const s28_cr = await sourceDb.s28.add(val28)
+    const s29_cr = await sourceDb.s29.add(val29)
+    const i_cr = await sourceDb.i.add(val27)
+    const is_cr = await sourceDb.is.add(val27)
+
+    assert(c1_cr.ok)
+    assert(c2_cr.ok)
+    assert(c3_cr.ok)
+    assert(c4_cr.ok)
+    assert(c5_cr.ok)
+    assert(c6_cr.ok)
+    assert(c7_cr.ok)
+    assert(c8_cr.ok)
+    assert(c9_cr.ok)
+    assert(c10_cr.ok)
+    assert(c11_cr.ok)
+    assert(c12_cr.ok)
+    assert(c13_cr.ok)
+    assert(c14_cr.ok)
+    assert(c15_cr.ok)
+    assert(c16_cr.ok)
+    assert(c17_cr.ok)
+    assert(c18_cr.ok)
+    assert(c19_cr.ok)
+    assert(c20_cr.ok)
+    assert(c21_cr.ok)
+    assert(c22_cr.ok)
+    assert(c23_cr.ok)
+    assert(c24_cr.ok)
+    assert(c25_cr.ok)
+    assert(c26_cr.ok)
+    assert(c27_cr.ok)
+    assert(c28_cr.ok)
+    assert(c29_cr.ok)
+    assert(s1_cr.ok)
+    assert(s2_cr.ok)
+    assert(s3_cr.ok)
+    assert(s4_cr.ok)
+    assert(s5_cr.ok)
+    assert(s6_cr.ok)
+    assert(s7_cr.ok)
+    assert(s8_cr.ok)
+    assert(s9_cr.ok)
+    assert(s10_cr.ok)
+    assert(s11_cr.ok)
+    assert(s12_cr.ok)
+    assert(s13_cr.ok)
+    assert(s14_cr.ok)
+    assert(s15_cr.ok)
+    assert(s16_cr.ok)
+    assert(s17_cr.ok)
+    assert(s18_cr.ok)
+    assert(s19_cr.ok)
+    assert(s20_cr.ok)
+    assert(s21_cr.ok)
+    assert(s22_cr.ok)
+    assert(s23_cr.ok)
+    assert(s24_cr.ok)
+    assert(s25_cr.ok)
+    assert(s26_cr.ok)
+    assert(s27_cr.ok)
+    assert(s28_cr.ok)
+    assert(s29_cr.ok)
+    assert(i_cr.ok)
+    assert(is_cr.ok)
+
+    await migrate({
+      source: sourceKv,
+      target: targetKv,
+    })
+
+    const targetDb = createDb(targetKv)
+
+    const c1_doc = await targetDb.c1.find(c1_cr.id)
+    const c2_doc = await targetDb.c2.find(c2_cr.id)
+    const c3_doc = await targetDb.c3.find(c3_cr.id)
+    const c4_doc = await targetDb.c4.find(c4_cr.id)
+    const c5_doc = await targetDb.c5.find(c5_cr.id)
+    const c6_doc = await targetDb.c6.find(c6_cr.id)
+    const c7_doc = await targetDb.c7.find(c7_cr.id)
+    const c8_doc = await targetDb.c8.find(c8_cr.id)
+    const c9_doc = await targetDb.c9.find(c9_cr.id)
+    const c10_doc = await targetDb.c10.find(c10_cr.id)
+    const c11_doc = await targetDb.c11.find(c11_cr.id)
+    const c12_doc = await targetDb.c12.find(c12_cr.id)
+    const c13_doc = await targetDb.c13.find(c13_cr.id)
+    const c14_doc = await targetDb.c14.find(c14_cr.id)
+    const c15_doc = await targetDb.c15.find(c15_cr.id)
+    const c16_doc = await targetDb.c16.find(c16_cr.id)
+    const c17_doc = await targetDb.c17.find(c17_cr.id)
+    const c18_doc = await targetDb.c18.find(c18_cr.id)
+    const c19_doc = await targetDb.c19.find(c19_cr.id)
+    const c20_doc = await targetDb.c20.find(c20_cr.id)
+    const c21_doc = await targetDb.c21.find(c21_cr.id)
+    const c22_doc = await targetDb.c22.find(c22_cr.id)
+    const c23_doc = await targetDb.c23.find(c23_cr.id)
+    const c24_doc = await targetDb.c24.find(c24_cr.id)
+    const c25_doc = await targetDb.c25.find(c25_cr.id)
+    //const c26_doc = await targetDb.c26.find(c26_cr.id)
+    //const c27_doc = await targetDb.c27.find(c27_cr.id)
+    //const c28_doc = await targetDb.c28.find(c28_cr.id)
+    //const c29_doc = await targetDb.c29.find(c29_cr.id)
+    const s1_doc = await targetDb.s1.find(s1_cr.id)
+    const s2_doc = await targetDb.s2.find(s2_cr.id)
+    const s3_doc = await targetDb.s3.find(s3_cr.id)
+    const s4_doc = await targetDb.s4.find(s4_cr.id)
+    const s5_doc = await targetDb.s5.find(s5_cr.id)
+    const s6_doc = await targetDb.s6.find(s6_cr.id)
+    const s7_doc = await targetDb.s7.find(s7_cr.id)
+    const s8_doc = await targetDb.s8.find(s8_cr.id)
+    const s9_doc = await targetDb.s9.find(s9_cr.id)
+    const s10_doc = await targetDb.s10.find(s10_cr.id)
+    const s11_doc = await targetDb.s11.find(s11_cr.id)
+    const s12_doc = await targetDb.s12.find(s12_cr.id)
+    const s13_doc = await targetDb.s13.find(s13_cr.id)
+    const s14_doc = await targetDb.s14.find(s14_cr.id)
+    const s15_doc = await targetDb.s15.find(s15_cr.id)
+    const s16_doc = await targetDb.s16.find(s16_cr.id)
+    const s17_doc = await targetDb.s17.find(s17_cr.id)
+    const s18_doc = await targetDb.s18.find(s18_cr.id)
+    const s19_doc = await targetDb.s19.find(s19_cr.id)
+    const s20_doc = await targetDb.s20.find(s20_cr.id)
+    const s21_doc = await targetDb.s21.find(s21_cr.id)
+    const s22_doc = await targetDb.s22.find(s22_cr.id)
+    const s23_doc = await targetDb.s23.find(s23_cr.id)
+    const s24_doc = await targetDb.s24.find(s24_cr.id)
+    const s25_doc = await targetDb.s25.find(s25_cr.id)
+    const s26_doc = await targetDb.s26.find(s26_cr.id)
+    const s27_doc = await targetDb.s27.find(s27_cr.id)
+    const s28_doc = await targetDb.s28.find(s28_cr.id)
+    const s29_doc = await targetDb.s29.find(s29_cr.id)
+    //const i_doc = await targetDb.i.find(i_cr.id)
+    const is_doc = await targetDb.is.find(is_cr.id)
+    const check = await targetKv.get(["check"])
+
+    assertEquals(c1_doc?.value, val1)
+    assertEquals(c2_doc?.value, val2)
+    assertEquals(c3_doc?.value, val3)
+    assertEquals(c4_doc?.value, val4)
+    assertEquals(c5_doc?.value, val5)
+    assertEquals(c6_doc?.value, val6)
+    assertEquals(c7_doc?.value, val7)
+    assertEquals(c8_doc?.value, val8)
+    assertEquals(c9_doc?.value, val9)
+    assertEquals(c10_doc?.value, val10)
+    assertEquals(c11_doc?.value, val11)
+    assertEquals(c12_doc?.value, val12)
+    assertEquals(c13_doc?.value, val13)
+    assertEquals(c14_doc?.value, val14)
+    assertEquals(c15_doc?.value, val15)
+    assertEquals(c16_doc?.value, val16)
+    assertEquals(c17_doc?.value, val17)
+    assertEquals(c18_doc?.value, val18)
+    assertEquals(c19_doc?.value, val19)
+    assertEquals(c20_doc?.value, val20)
+    assertEquals(c21_doc?.value, val21)
+    assertEquals(c22_doc?.value, val22)
+    assertEquals(c23_doc?.value, val23)
+    assertEquals(c24_doc?.value, val24)
+    assertEquals(c25_doc?.value, val25)
+    // until nested Deno.KvU64 is fixed // assertEquals(c26_doc?.value, val26)
+    // until nested Deno.KvU64 is fixed // assertEquals(c27_doc?.value, val27)
+    // until nested Deno.KvU64 is fixed // assertEquals(c28_doc?.value, val28)
+    // until nested Deno.KvU64 is fixed // assertEquals(c29_doc?.value, val29)
+    assertEquals(s1_doc?.value, val1)
+    assertEquals(s2_doc?.value, val2)
+    assertEquals(s3_doc?.value, val3)
+    assertEquals(s4_doc?.value, val4)
+    assertEquals(s5_doc?.value, val5)
+    assertEquals(s6_doc?.value, val6)
+    assertEquals(s7_doc?.value, val7)
+    assertEquals(s8_doc?.value, val8)
+    assertEquals(s9_doc?.value, val9)
+    assertEquals(s10_doc?.value, val10)
+    assertEquals(s11_doc?.value, val11)
+    assertEquals(s12_doc?.value, val12)
+    assertEquals(s13_doc?.value, val13)
+    assertEquals(s14_doc?.value, val14)
+    assertEquals(s15_doc?.value, val15)
+    assertEquals(s16_doc?.value, val16)
+    assertEquals(s17_doc?.value, val17)
+    assertEquals(s18_doc?.value, val18)
+    assertEquals(s19_doc?.value, val19)
+    assertEquals(s20_doc?.value, val20)
+    assertEquals(s21_doc?.value, val21)
+    assertEquals(s22_doc?.value, val22)
+    assertEquals(s23_doc?.value, val23)
+    assertEquals(s24_doc?.value, val24)
+    assertEquals(s25_doc?.value, val25)
+    assertEquals(s26_doc?.value, val26)
+    assertEquals(s27_doc?.value, val27)
+    assertEquals(s28_doc?.value, val28)
+    assertEquals(s29_doc?.value, val29)
+    // until nested Deno.KvU64 is fixed // assertEquals(i_doc?.value, val27)
+    assertEquals(is_doc?.value, val27)
+    assert(!check.versionstamp && !check.value)
+
+    sourceKv.close()
+    targetKv.close()
+
+    await Deno.remove(temp)
+  })
+
+  await t.step("Should migrate all entries", async () => {
+    const temp = await Deno.makeTempFile({ suffix: ".sqlite3" })
+    using sourceKv = await Deno.openKv(":memory:")
+    using targetKv = await Deno.openKv(temp)
+
+    await sourceKv.set(["check"], "check")
+
+    const sourceDb = createDb(sourceKv)
+
+    const c1_cr = await sourceDb.c1.add(val1)
+    const c2_cr = await sourceDb.c2.add(val2)
+    const c3_cr = await sourceDb.c3.add(val3)
+    const c4_cr = await sourceDb.c4.add(val4)
+    const c5_cr = await sourceDb.c5.add(val5)
+    const c6_cr = await sourceDb.c6.add(val6)
+    const c7_cr = await sourceDb.c7.add(val7)
+    const c8_cr = await sourceDb.c8.add(val8)
+    const c9_cr = await sourceDb.c9.add(val9)
+    const c10_cr = await sourceDb.c10.add(val10)
+    const c11_cr = await sourceDb.c11.add(val11)
+    const c12_cr = await sourceDb.c12.add(val12)
+    const c13_cr = await sourceDb.c13.add(val13)
+    const c14_cr = await sourceDb.c14.add(val14)
+    const c15_cr = await sourceDb.c15.add(val15)
+    const c16_cr = await sourceDb.c16.add(val16)
+    const c17_cr = await sourceDb.c17.add(val17)
+    const c18_cr = await sourceDb.c18.add(val18)
+    const c19_cr = await sourceDb.c19.add(val19)
+    const c20_cr = await sourceDb.c20.add(val20)
+    const c21_cr = await sourceDb.c21.add(val21)
+    const c22_cr = await sourceDb.c22.add(val22)
+    const c23_cr = await sourceDb.c23.add(val23)
+    const c24_cr = await sourceDb.c24.add(val24)
+    const c25_cr = await sourceDb.c25.add(val25)
+    const c26_cr = await sourceDb.c26.add(val26)
+    const c27_cr = await sourceDb.c27.add(val27)
+    const c28_cr = await sourceDb.c28.add(val28)
+    const c29_cr = await sourceDb.c29.add(val29)
+    const s1_cr = await sourceDb.s1.add(val1)
+    const s2_cr = await sourceDb.s2.add(val2)
+    const s3_cr = await sourceDb.s3.add(val3)
+    const s4_cr = await sourceDb.s4.add(val4)
+    const s5_cr = await sourceDb.s5.add(val5)
+    const s6_cr = await sourceDb.s6.add(val6)
+    const s7_cr = await sourceDb.s7.add(val7)
+    const s8_cr = await sourceDb.s8.add(val8)
+    const s9_cr = await sourceDb.s9.add(val9)
+    const s10_cr = await sourceDb.s10.add(val10)
+    const s11_cr = await sourceDb.s11.add(val11)
+    const s12_cr = await sourceDb.s12.add(val12)
+    const s13_cr = await sourceDb.s13.add(val13)
+    const s14_cr = await sourceDb.s14.add(val14)
+    const s15_cr = await sourceDb.s15.add(val15)
+    const s16_cr = await sourceDb.s16.add(val16)
+    const s17_cr = await sourceDb.s17.add(val17)
+    const s18_cr = await sourceDb.s18.add(val18)
+    const s19_cr = await sourceDb.s19.add(val19)
+    const s20_cr = await sourceDb.s20.add(val20)
+    const s21_cr = await sourceDb.s21.add(val21)
+    const s22_cr = await sourceDb.s22.add(val22)
+    const s23_cr = await sourceDb.s23.add(val23)
+    const s24_cr = await sourceDb.s24.add(val24)
+    const s25_cr = await sourceDb.s25.add(val25)
+    const s26_cr = await sourceDb.s26.add(val26)
+    const s27_cr = await sourceDb.s27.add(val27)
+    const s28_cr = await sourceDb.s28.add(val28)
+    const s29_cr = await sourceDb.s29.add(val29)
+    const i_cr = await sourceDb.i.add(val27)
+    const is_cr = await sourceDb.is.add(val27)
+
+    assert(c1_cr.ok)
+    assert(c2_cr.ok)
+    assert(c3_cr.ok)
+    assert(c4_cr.ok)
+    assert(c5_cr.ok)
+    assert(c6_cr.ok)
+    assert(c7_cr.ok)
+    assert(c8_cr.ok)
+    assert(c9_cr.ok)
+    assert(c10_cr.ok)
+    assert(c11_cr.ok)
+    assert(c12_cr.ok)
+    assert(c13_cr.ok)
+    assert(c14_cr.ok)
+    assert(c15_cr.ok)
+    assert(c16_cr.ok)
+    assert(c17_cr.ok)
+    assert(c18_cr.ok)
+    assert(c19_cr.ok)
+    assert(c20_cr.ok)
+    assert(c21_cr.ok)
+    assert(c22_cr.ok)
+    assert(c23_cr.ok)
+    assert(c24_cr.ok)
+    assert(c25_cr.ok)
+    assert(c26_cr.ok)
+    assert(c27_cr.ok)
+    assert(c28_cr.ok)
+    assert(c29_cr.ok)
+    assert(s1_cr.ok)
+    assert(s2_cr.ok)
+    assert(s3_cr.ok)
+    assert(s4_cr.ok)
+    assert(s5_cr.ok)
+    assert(s6_cr.ok)
+    assert(s7_cr.ok)
+    assert(s8_cr.ok)
+    assert(s9_cr.ok)
+    assert(s10_cr.ok)
+    assert(s11_cr.ok)
+    assert(s12_cr.ok)
+    assert(s13_cr.ok)
+    assert(s14_cr.ok)
+    assert(s15_cr.ok)
+    assert(s16_cr.ok)
+    assert(s17_cr.ok)
+    assert(s18_cr.ok)
+    assert(s19_cr.ok)
+    assert(s20_cr.ok)
+    assert(s21_cr.ok)
+    assert(s22_cr.ok)
+    assert(s23_cr.ok)
+    assert(s24_cr.ok)
+    assert(s25_cr.ok)
+    assert(s26_cr.ok)
+    assert(s27_cr.ok)
+    assert(s28_cr.ok)
+    assert(s29_cr.ok)
+    assert(i_cr.ok)
+    assert(is_cr.ok)
+
+    await migrate({
+      source: sourceKv,
+      target: targetKv,
+      all: true,
+    })
+
+    const targetDb = createDb(targetKv)
+
+    const c1_doc = await targetDb.c1.find(c1_cr.id)
+    const c2_doc = await targetDb.c2.find(c2_cr.id)
+    const c3_doc = await targetDb.c3.find(c3_cr.id)
+    const c4_doc = await targetDb.c4.find(c4_cr.id)
+    const c5_doc = await targetDb.c5.find(c5_cr.id)
+    const c6_doc = await targetDb.c6.find(c6_cr.id)
+    const c7_doc = await targetDb.c7.find(c7_cr.id)
+    const c8_doc = await targetDb.c8.find(c8_cr.id)
+    const c9_doc = await targetDb.c9.find(c9_cr.id)
+    const c10_doc = await targetDb.c10.find(c10_cr.id)
+    const c11_doc = await targetDb.c11.find(c11_cr.id)
+    const c12_doc = await targetDb.c12.find(c12_cr.id)
+    const c13_doc = await targetDb.c13.find(c13_cr.id)
+    const c14_doc = await targetDb.c14.find(c14_cr.id)
+    const c15_doc = await targetDb.c15.find(c15_cr.id)
+    const c16_doc = await targetDb.c16.find(c16_cr.id)
+    const c17_doc = await targetDb.c17.find(c17_cr.id)
+    const c18_doc = await targetDb.c18.find(c18_cr.id)
+    const c19_doc = await targetDb.c19.find(c19_cr.id)
+    const c20_doc = await targetDb.c20.find(c20_cr.id)
+    const c21_doc = await targetDb.c21.find(c21_cr.id)
+    const c22_doc = await targetDb.c22.find(c22_cr.id)
+    const c23_doc = await targetDb.c23.find(c23_cr.id)
+    const c24_doc = await targetDb.c24.find(c24_cr.id)
+    const c25_doc = await targetDb.c25.find(c25_cr.id)
+    //const c26_doc = await targetDb.c26.find(c26_cr.id)
+    //const c27_doc = await targetDb.c27.find(c27_cr.id)
+    //const c28_doc = await targetDb.c28.find(c28_cr.id)
+    //const c29_doc = await targetDb.c29.find(c29_cr.id)
+    const s1_doc = await targetDb.s1.find(s1_cr.id)
+    const s2_doc = await targetDb.s2.find(s2_cr.id)
+    const s3_doc = await targetDb.s3.find(s3_cr.id)
+    const s4_doc = await targetDb.s4.find(s4_cr.id)
+    const s5_doc = await targetDb.s5.find(s5_cr.id)
+    const s6_doc = await targetDb.s6.find(s6_cr.id)
+    const s7_doc = await targetDb.s7.find(s7_cr.id)
+    const s8_doc = await targetDb.s8.find(s8_cr.id)
+    const s9_doc = await targetDb.s9.find(s9_cr.id)
+    const s10_doc = await targetDb.s10.find(s10_cr.id)
+    const s11_doc = await targetDb.s11.find(s11_cr.id)
+    const s12_doc = await targetDb.s12.find(s12_cr.id)
+    const s13_doc = await targetDb.s13.find(s13_cr.id)
+    const s14_doc = await targetDb.s14.find(s14_cr.id)
+    const s15_doc = await targetDb.s15.find(s15_cr.id)
+    const s16_doc = await targetDb.s16.find(s16_cr.id)
+    const s17_doc = await targetDb.s17.find(s17_cr.id)
+    const s18_doc = await targetDb.s18.find(s18_cr.id)
+    const s19_doc = await targetDb.s19.find(s19_cr.id)
+    const s20_doc = await targetDb.s20.find(s20_cr.id)
+    const s21_doc = await targetDb.s21.find(s21_cr.id)
+    const s22_doc = await targetDb.s22.find(s22_cr.id)
+    const s23_doc = await targetDb.s23.find(s23_cr.id)
+    const s24_doc = await targetDb.s24.find(s24_cr.id)
+    const s25_doc = await targetDb.s25.find(s25_cr.id)
+    const s26_doc = await targetDb.s26.find(s26_cr.id)
+    const s27_doc = await targetDb.s27.find(s27_cr.id)
+    const s28_doc = await targetDb.s28.find(s28_cr.id)
+    const s29_doc = await targetDb.s29.find(s29_cr.id)
+    //const i_doc = await targetDb.i.find(i_cr.id)
+    const is_doc = await targetDb.is.find(is_cr.id)
+    const check = await targetKv.get(["check"])
+
+    assertEquals(c1_doc?.value, val1)
+    assertEquals(c2_doc?.value, val2)
+    assertEquals(c3_doc?.value, val3)
+    assertEquals(c4_doc?.value, val4)
+    assertEquals(c5_doc?.value, val5)
+    assertEquals(c6_doc?.value, val6)
+    assertEquals(c7_doc?.value, val7)
+    assertEquals(c8_doc?.value, val8)
+    assertEquals(c9_doc?.value, val9)
+    assertEquals(c10_doc?.value, val10)
+    assertEquals(c11_doc?.value, val11)
+    assertEquals(c12_doc?.value, val12)
+    assertEquals(c13_doc?.value, val13)
+    assertEquals(c14_doc?.value, val14)
+    assertEquals(c15_doc?.value, val15)
+    assertEquals(c16_doc?.value, val16)
+    assertEquals(c17_doc?.value, val17)
+    assertEquals(c18_doc?.value, val18)
+    assertEquals(c19_doc?.value, val19)
+    assertEquals(c20_doc?.value, val20)
+    assertEquals(c21_doc?.value, val21)
+    assertEquals(c22_doc?.value, val22)
+    assertEquals(c23_doc?.value, val23)
+    assertEquals(c24_doc?.value, val24)
+    assertEquals(c25_doc?.value, val25)
+    // until nested Deno.KvU64 is fixed // assertEquals(c26_doc?.value, val26)
+    // until nested Deno.KvU64 is fixed // assertEquals(c27_doc?.value, val27)
+    // until nested Deno.KvU64 is fixed // assertEquals(c28_doc?.value, val28)
+    // until nested Deno.KvU64 is fixed // assertEquals(c29_doc?.value, val29)
+    assertEquals(s1_doc?.value, val1)
+    assertEquals(s2_doc?.value, val2)
+    assertEquals(s3_doc?.value, val3)
+    assertEquals(s4_doc?.value, val4)
+    assertEquals(s5_doc?.value, val5)
+    assertEquals(s6_doc?.value, val6)
+    assertEquals(s7_doc?.value, val7)
+    assertEquals(s8_doc?.value, val8)
+    assertEquals(s9_doc?.value, val9)
+    assertEquals(s10_doc?.value, val10)
+    assertEquals(s11_doc?.value, val11)
+    assertEquals(s12_doc?.value, val12)
+    assertEquals(s13_doc?.value, val13)
+    assertEquals(s14_doc?.value, val14)
+    assertEquals(s15_doc?.value, val15)
+    assertEquals(s16_doc?.value, val16)
+    assertEquals(s17_doc?.value, val17)
+    assertEquals(s18_doc?.value, val18)
+    assertEquals(s19_doc?.value, val19)
+    assertEquals(s20_doc?.value, val20)
+    assertEquals(s21_doc?.value, val21)
+    assertEquals(s22_doc?.value, val22)
+    assertEquals(s23_doc?.value, val23)
+    assertEquals(s24_doc?.value, val24)
+    assertEquals(s25_doc?.value, val25)
+    assertEquals(s26_doc?.value, val26)
+    assertEquals(s27_doc?.value, val27)
+    assertEquals(s28_doc?.value, val28)
+    assertEquals(s29_doc?.value, val29)
+    // until nested Deno.KvU64 is fixed // assertEquals(i_doc?.value, val27)
+    assertEquals(is_doc?.value, val27)
+    assert(!!check.versionstamp && !!check.value)
+
+    sourceKv.close()
+    targetKv.close()
+
+    await Deno.remove(temp)
+  })
+})