diff --git a/README.md b/README.md
index 17405c6..8395acd 100644
--- a/README.md
+++ b/README.md
@@ -28,12 +28,12 @@ The actual binary structure looks like this:
 This structure is repeats for the number of files.
 
 # Browser
-Collected only parts of this module that not use the `Deno` namespace and prepared as browser-compatible code to [`mod.universal.ts`](./mod.universal.ts).
+Collected only parts of this module that not use the `Deno` namespace and prepared as browser-compatible pure JavaScript to [`mod.pure.ts`](./mod.pure.ts).
 
 You can use script from [esm.sh](https://esm.sh).
 
 ```ts
-import {fetchExtend} from "https://esm.sh/gh/dojyorin/deno_simple_utility@version/mod.universal.ts?bundle&target=esnext";
+import {fetchExtend} from "https://esm.sh/gh/dojyorin/deno_simple_utility@version/mod.pure.ts?bundle&target=esnext";
 ```
 
 # API
diff --git a/mod.pure.ts b/mod.pure.ts
new file mode 100644
index 0000000..73a06af
--- /dev/null
+++ b/mod.pure.ts
@@ -0,0 +1,13 @@
+export * from "./src/pure/base64.ts";
+export * from "./src/pure/byte.ts";
+export * from "./src/pure/crypto.ts";
+export * from "./src/pure/deep.ts";
+export * from "./src/pure/deflate.ts";
+export * from "./src/pure/fetch.ts";
+export * from "./src/pure/import.ts";
+export * from "./src/pure/minipack.ts";
+export * from "./src/pure/primitive.ts";
+export * from "./src/pure/stream.ts";
+export * from "./src/pure/text.ts";
+export * from "./src/pure/time.ts";
+export * from "./src/pure/worker.ts";
\ No newline at end of file
diff --git a/mod.test.ts b/mod.test.ts
index 49cb8b0..382779f 100644
--- a/mod.test.ts
+++ b/mod.test.ts
@@ -1,19 +1,20 @@
-import "./test/base64.test.ts";
-import "./test/byte.test.ts";
-import "./test/crypto.test.ts";
-import "./test/csv.deno.test.ts";
-import "./test/deep.test.ts";
-import "./test/deflate.test.ts";
-import "./test/fetch.test.ts";
-import "./test/import.test.ts";
-import "./test/json.deno.test.ts";
-import "./test/log.deno.test.ts";
-import "./test/minipack.test.ts";
-import "./test/path.deno.test.ts";
-import "./test/platform.deno.test.ts";
-import "./test/primitive.test.ts";
-import "./test/process.deno.test.ts";
-import "./test/stream.test.ts";
-import "./test/text.test.ts";
-import "./test/time.test.ts";
-import "./test/worker.test.ts";
\ No newline at end of file
+import "./test/pure/base64.test.ts";
+import "./test/pure/byte.test.ts";
+import "./test/pure/crypto.test.ts";
+import "./test/pure/deep.test.ts";
+import "./test/pure/deflate.test.ts";
+import "./test/pure/fetch.test.ts";
+import "./test/pure/import.test.ts";
+import "./test/pure/primitive.test.ts";
+import "./test/pure/minipack.test.ts";
+import "./test/pure/stream.test.ts";
+import "./test/pure/text.test.ts";
+import "./test/pure/time.test.ts";
+import "./test/pure/worker.test.ts";
+
+import "./test/deno/csv.test.ts";
+import "./test/deno/json.test.ts";
+import "./test/deno/log.test.ts";
+import "./test/deno/path.test.ts";
+import "./test/deno/platform.test.ts";
+import "./test/deno/process.test.ts";
\ No newline at end of file
diff --git a/mod.ts b/mod.ts
index 6282c95..132349e 100644
--- a/mod.ts
+++ b/mod.ts
@@ -1,20 +1,20 @@
-export * from "./src/base64.ts";
-export * from "./src/byte.ts";
-export * from "./src/crypto.ts";
-export * from "./src/deep.ts";
-export * from "./src/deflate.ts";
-export * from "./src/fetch.ts";
-export * from "./src/import.ts";
-export * from "./src/minipack.ts";
-export * from "./src/primitive.ts";
-export * from "./src/stream.ts";
-export * from "./src/text.ts";
-export * from "./src/time.ts";
-export * from "./src/worker.ts";
+export * from "./src/pure/base64.ts";
+export * from "./src/pure/byte.ts";
+export * from "./src/pure/crypto.ts";
+export * from "./src/pure/deep.ts";
+export * from "./src/pure/deflate.ts";
+export * from "./src/pure/fetch.ts";
+export * from "./src/pure/import.ts";
+export * from "./src/pure/minipack.ts";
+export * from "./src/pure/primitive.ts";
+export * from "./src/pure/stream.ts";
+export * from "./src/pure/text.ts";
+export * from "./src/pure/time.ts";
+export * from "./src/pure/worker.ts";
 
-export * from "./src/csv.deno.ts";
-export * from "./src/json.deno.ts";
-export * from "./src/log.deno.ts";
-export * from "./src/path.deno.ts";
-export * from "./src/platform.deno.ts";
-export * from "./src/process.deno.ts";
\ No newline at end of file
+export * from "./src/deno/csv.ts";
+export * from "./src/deno/json.ts";
+export * from "./src/deno/log.ts";
+export * from "./src/deno/path.ts";
+export * from "./src/deno/platform.ts";
+export * from "./src/deno/process.ts";
\ No newline at end of file
diff --git a/mod.universal.ts b/mod.universal.ts
deleted file mode 100644
index 0cdb7b7..0000000
--- a/mod.universal.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-export * from "./src/base64.ts";
-export * from "./src/byte.ts";
-export * from "./src/crypto.ts";
-export * from "./src/deep.ts";
-export * from "./src/deflate.ts";
-export * from "./src/fetch.ts";
-export * from "./src/import.ts";
-export * from "./src/minipack.ts";
-export * from "./src/primitive.ts";
-export * from "./src/stream.ts";
-export * from "./src/text.ts";
-export * from "./src/time.ts";
-export * from "./src/worker.ts";
\ No newline at end of file
diff --git a/src/csv.deno.ts b/src/deno/csv.ts
similarity index 89%
rename from src/csv.deno.ts
rename to src/deno/csv.ts
index 3a6c738..380825d 100644
--- a/src/csv.deno.ts
+++ b/src/deno/csv.ts
@@ -1,6 +1,6 @@
-import {parse, stringify} from "../deps.ts";
-import {deepClone} from "./deep.ts";
-import {primitiveParseX} from "./primitive.ts";
+import {parse, stringify} from "../../deps.ts";
+import {deepClone} from "../pure/deep.ts";
+import {primitiveParseX} from "../pure/primitive.ts";
 
 /**
 * Object containing string, number, or boolean.
diff --git a/src/json.deno.ts b/src/deno/json.ts
similarity index 96%
rename from src/json.deno.ts
rename to src/deno/json.ts
index 0498193..232f475 100644
--- a/src/json.deno.ts
+++ b/src/deno/json.ts
@@ -1,4 +1,4 @@
-import {type Opt} from "./deep.ts";
+import {type Opt} from "../pure/deep.ts";
 
 /**
 * Read JSON file and convert to object.
diff --git a/src/log.deno.ts b/src/deno/log.ts
similarity index 90%
rename from src/log.deno.ts
rename to src/deno/log.ts
index 94a0abf..36da6af 100644
--- a/src/log.deno.ts
+++ b/src/deno/log.ts
@@ -1,5 +1,5 @@
-import {Logger, ConsoleHandler, FileHandler, format} from "../deps.ts";
-import {mainPath} from "./path.deno.ts";
+import {Logger, ConsoleHandler, FileHandler, format} from "../../deps.ts";
+import {mainPath} from "./path.ts";
 
 function logRecord(date:Date, level:string, message:string){
     return `${format(date, "yyyy-MM-ddTHH:mm:ss")} [${level}] ${message}`;
diff --git a/src/path.deno.ts b/src/deno/path.ts
similarity index 94%
rename from src/path.deno.ts
rename to src/deno/path.ts
index 8fd8977..56759b6 100644
--- a/src/path.deno.ts
+++ b/src/deno/path.ts
@@ -1,5 +1,5 @@
-import {dirname, fromFileUrl} from "../deps.ts";
-import {isWin} from "./platform.deno.ts";
+import {dirname, fromFileUrl} from "../../deps.ts";
+import {isWin} from "./platform.ts";
 
 /**
 * Convert from backslash to slash.
diff --git a/src/platform.deno.ts b/src/deno/platform.ts
similarity index 100%
rename from src/platform.deno.ts
rename to src/deno/platform.ts
diff --git a/src/process.deno.ts b/src/deno/process.ts
similarity index 100%
rename from src/process.deno.ts
rename to src/deno/process.ts
diff --git a/src/base64.ts b/src/pure/base64.ts
similarity index 100%
rename from src/base64.ts
rename to src/pure/base64.ts
diff --git a/src/byte.ts b/src/pure/byte.ts
similarity index 100%
rename from src/byte.ts
rename to src/pure/byte.ts
diff --git a/src/crypto.ts b/src/pure/crypto.ts
similarity index 100%
rename from src/crypto.ts
rename to src/pure/crypto.ts
diff --git a/src/deep.ts b/src/pure/deep.ts
similarity index 100%
rename from src/deep.ts
rename to src/pure/deep.ts
diff --git a/src/deflate.ts b/src/pure/deflate.ts
similarity index 100%
rename from src/deflate.ts
rename to src/pure/deflate.ts
diff --git a/src/fetch.ts b/src/pure/fetch.ts
similarity index 100%
rename from src/fetch.ts
rename to src/pure/fetch.ts
diff --git a/src/import.ts b/src/pure/import.ts
similarity index 100%
rename from src/import.ts
rename to src/pure/import.ts
diff --git a/src/minipack.ts b/src/pure/minipack.ts
similarity index 100%
rename from src/minipack.ts
rename to src/pure/minipack.ts
diff --git a/src/primitive.ts b/src/pure/primitive.ts
similarity index 100%
rename from src/primitive.ts
rename to src/pure/primitive.ts
diff --git a/src/stream.ts b/src/pure/stream.ts
similarity index 100%
rename from src/stream.ts
rename to src/pure/stream.ts
diff --git a/src/text.ts b/src/pure/text.ts
similarity index 100%
rename from src/text.ts
rename to src/pure/text.ts
diff --git a/src/time.ts b/src/pure/time.ts
similarity index 100%
rename from src/time.ts
rename to src/pure/time.ts
diff --git a/src/worker.ts b/src/pure/worker.ts
similarity index 100%
rename from src/worker.ts
rename to src/pure/worker.ts
diff --git a/test/csv.deno.test.ts b/test/deno/csv.test.ts
similarity index 78%
rename from test/csv.deno.test.ts
rename to test/deno/csv.test.ts
index e2cab2b..2474c41 100644
--- a/test/csv.deno.test.ts
+++ b/test/deno/csv.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {csvEncode, csvDecode} from "../src/csv.deno.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {csvEncode, csvDecode} from "../../src/deno/csv.ts";
 
 const sample = [{
     foo: 123,
diff --git a/test/json.deno.test.ts b/test/deno/json.test.ts
similarity index 86%
rename from test/json.deno.test.ts
rename to test/deno/json.test.ts
index 1292e03..680bd19 100644
--- a/test/json.deno.test.ts
+++ b/test/deno/json.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {jsonRead, jsonWrite, jsonLoad} from "../src/json.deno.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {jsonRead, jsonWrite, jsonLoad} from "../../src/deno/json.ts";
 
 const object = <const>{
     id: "22d8b040-8a63-46a0-8df6-0f508a778689",
diff --git a/test/log.deno.test.ts b/test/deno/log.test.ts
similarity index 78%
rename from test/log.deno.test.ts
rename to test/deno/log.test.ts
index 9eb0d48..eb9ce26 100644
--- a/test/log.deno.test.ts
+++ b/test/deno/log.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals, exists} from "../deps.test.ts";
-import {logEntry} from "../src/log.deno.ts";
+import {assertEquals, exists} from "../../deps.test.ts";
+import {logEntry} from "../../src/deno/log.ts";
 
 const name = "operation";
 
diff --git a/test/path.deno.test.ts b/test/deno/path.test.ts
similarity index 91%
rename from test/path.deno.test.ts
rename to test/deno/path.test.ts
index 00ea448..7d6ce83 100644
--- a/test/path.deno.test.ts
+++ b/test/deno/path.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals, dirname, fromFileUrl} from "../deps.test.ts";
-import {slashU, slashW, tmpPath, dataPath, homePath, mainPath} from "../src/path.deno.ts";
+import {assertEquals, dirname, fromFileUrl} from "../../deps.test.ts";
+import {slashU, slashW, tmpPath, dataPath, homePath, mainPath} from "../../src/deno/path.ts";
 
 Deno.test({
     name: "Path: Separator",
diff --git a/test/platform.deno.test.ts b/test/deno/platform.test.ts
similarity index 73%
rename from test/platform.deno.test.ts
rename to test/deno/platform.test.ts
index cf1ff22..1ed56bd 100644
--- a/test/platform.deno.test.ts
+++ b/test/deno/platform.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {isWin} from "../src/platform.deno.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {isWin} from "../../src/deno/platform.ts";
 
 Deno.test({
     ignore: Deno.build.os !== "windows",
diff --git a/test/process.deno.test.ts b/test/deno/process.test.ts
similarity index 62%
rename from test/process.deno.test.ts
rename to test/deno/process.test.ts
index 20a3719..98dabe0 100644
--- a/test/process.deno.test.ts
+++ b/test/deno/process.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {runCommand} from "../src/process.deno.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {runCommand} from "../../src/deno/process.ts";
 
 Deno.test({
     name: "Process: Run (no args)",
diff --git a/test/base64.test.ts b/test/pure/base64.test.ts
similarity index 86%
rename from test/base64.test.ts
rename to test/pure/base64.test.ts
index 27a22df..41273d7 100644
--- a/test/base64.test.ts
+++ b/test/pure/base64.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {b64Encode, b64Decode, b64DataURL} from "../src/base64.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {b64Encode, b64Decode, b64DataURL} from "../../src/pure/base64.ts";
 
 const sample1 = new Uint8Array([
     0x58, 0x0D, 0xC7, 0x64, 0x21, 0x42, 0x27, 0x76,
diff --git a/test/byte.test.ts b/test/pure/byte.test.ts
similarity index 78%
rename from test/byte.test.ts
rename to test/pure/byte.test.ts
index c402741..b6b3328 100644
--- a/test/byte.test.ts
+++ b/test/pure/byte.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {blobConvert, byteConcat} from "../src/byte.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {blobConvert, byteConcat} from "../../src/pure/byte.ts";
 
 const sample = "hello!";
 
diff --git a/test/crypto.test.ts b/test/pure/crypto.test.ts
similarity index 93%
rename from test/crypto.test.ts
rename to test/pure/crypto.test.ts
index da954ed..6ab381e 100644
--- a/test/crypto.test.ts
+++ b/test/pure/crypto.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {generateRandom, deriveHash, pkGenerateECDH, pkGenerateECDSA, pkEncrypt, pkDecrypt, pkSign, pkVerify} from "../src/crypto.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {generateRandom, deriveHash, pkGenerateECDH, pkGenerateECDSA, pkEncrypt, pkDecrypt, pkSign, pkVerify} from "../../src/pure/crypto.ts";
 
 const sample = new Uint8Array([0x02, 0xF2, 0x5D, 0x1F, 0x1C, 0x34, 0xB9, 0x2F]);
 
diff --git a/test/deep.test.ts b/test/pure/deep.test.ts
similarity index 84%
rename from test/deep.test.ts
rename to test/pure/deep.test.ts
index 8d64b40..07684cd 100644
--- a/test/deep.test.ts
+++ b/test/pure/deep.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {deepClone, deepFreeze, deepSeal} from "../src/deep.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {deepClone, deepFreeze, deepSeal} from "../../src/pure/deep.ts";
 
 const sample = {
     aaa: {
diff --git a/test/deflate.test.ts b/test/pure/deflate.test.ts
similarity index 79%
rename from test/deflate.test.ts
rename to test/pure/deflate.test.ts
index 7017344..ed5c386 100644
--- a/test/deflate.test.ts
+++ b/test/pure/deflate.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {deflateEncode, deflateDecode} from "../src/deflate.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {deflateEncode, deflateDecode} from "../../src/pure/deflate.ts";
 
 const sample = new Uint8Array([
     0x71, 0xD6, 0xFB, 0x3D, 0xF9, 0xD9, 0x41, 0x07,
diff --git a/test/fetch.test.ts b/test/pure/fetch.test.ts
similarity index 85%
rename from test/fetch.test.ts
rename to test/pure/fetch.test.ts
index 98badea..9bdaa98 100644
--- a/test/fetch.test.ts
+++ b/test/pure/fetch.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {fetchExtend} from "../src/fetch.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {fetchExtend} from "../../src/pure/fetch.ts";
 
 const sample = new Uint8Array([
     0x71, 0xD6, 0xFB, 0x3D, 0xF9, 0xD9, 0x41, 0x07,
diff --git a/test/import.test.ts b/test/pure/import.test.ts
similarity index 67%
rename from test/import.test.ts
rename to test/pure/import.test.ts
index 03d018a..e9a8930 100644
--- a/test/import.test.ts
+++ b/test/pure/import.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {importAssert} from "../src/import.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {importAssert} from "../../src/pure/import.ts";
 
 const expect = <const>{
     assert: {
diff --git a/test/minipack.test.ts b/test/pure/minipack.test.ts
similarity index 77%
rename from test/minipack.test.ts
rename to test/pure/minipack.test.ts
index dfcd35c..8f5b25e 100644
--- a/test/minipack.test.ts
+++ b/test/pure/minipack.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {mpEncode, mpDecode} from "../src/minipack.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {mpEncode, mpDecode} from "../../src/pure/minipack.ts";
 
 const sampleBin = new Uint8Array([0x02, 0xF2, 0x5D, 0x1F, 0x1C, 0x34, 0xB9, 0x2F]);
 const sampleName = "random.bin";
diff --git a/test/primitive.test.ts b/test/pure/primitive.test.ts
similarity index 88%
rename from test/primitive.test.ts
rename to test/pure/primitive.test.ts
index b2727e0..2349826 100644
--- a/test/primitive.test.ts
+++ b/test/pure/primitive.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {primitiveParse, primitiveParseX} from "../src/primitive.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {primitiveParse, primitiveParseX} from "../../src/pure/primitive.ts";
 
 Deno.test({
     name: "Primitive: Parse",
diff --git a/test/stream.test.ts b/test/pure/stream.test.ts
similarity index 79%
rename from test/stream.test.ts
rename to test/pure/stream.test.ts
index 8cfb360..b263cdb 100644
--- a/test/stream.test.ts
+++ b/test/pure/stream.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {streamEncode, streamDecode} from "../src/stream.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {streamEncode, streamDecode} from "../../src/pure/stream.ts";
 
 const sample = new Uint8Array([
     0x71, 0xD6, 0xFB, 0x3D, 0xF9, 0xD9, 0x41, 0x07,
diff --git a/test/text.test.ts b/test/pure/text.test.ts
similarity index 93%
rename from test/text.test.ts
rename to test/pure/text.test.ts
index aa2b9c9..7deb100 100644
--- a/test/text.test.ts
+++ b/test/pure/text.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {u8Encode, u8Decode, sjisDecode, hexEncode, hexDecode, trimExtend, fixWidth, cleanText, accurateSegment, pad0} from "../src/text.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {u8Encode, u8Decode, sjisDecode, hexEncode, hexDecode, trimExtend, fixWidth, cleanText, accurateSegment, pad0} from "../../src/pure/text.ts";
 
 const sampleText = "  Lorem ipsum\r dolor   sit  \r\r amet. ";
 const sampleBin = new Uint8Array([
diff --git a/test/time.test.ts b/test/pure/time.test.ts
similarity index 82%
rename from test/time.test.ts
rename to test/pure/time.test.ts
index db16be3..4349584 100644
--- a/test/time.test.ts
+++ b/test/pure/time.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {utEncode, utDecode, utParse, delay, dtSerial} from "../src/time.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {utEncode, utDecode, utParse, delay, dtSerial} from "../../src/pure/time.ts";
 
 const sample = new Date(2000, 0, 1, 0, 0, 0, 0);
 
diff --git a/test/worker.test.ts b/test/pure/worker.test.ts
similarity index 82%
rename from test/worker.test.ts
rename to test/pure/worker.test.ts
index 7fbd9ef..ffbfb93 100644
--- a/test/worker.test.ts
+++ b/test/pure/worker.test.ts
@@ -1,5 +1,5 @@
-import {assertEquals} from "../deps.test.ts";
-import {createTask} from "../src/worker.ts";
+import {assertEquals} from "../../deps.test.ts";
+import {createTask} from "../../src/pure/worker.ts";
 
 const sample1 = new Uint8Array([1, 2, 3, 4]);
 const sample2 = new Uint8Array([2, 4, 6, 8]);