diff --git a/packages/core/src/decoy.ts b/packages/core/src/decoy.ts
index 8f3f3ee..8ead821 100644
--- a/packages/core/src/decoy.ts
+++ b/packages/core/src/decoy.ts
@@ -1,5 +1,5 @@
 import type { HasherAndAlg, SaltGenerator } from '@sd-jwt/types';
-import { Uint8ArrayToBase64Url } from '@sd-jwt/utils';
+import { uint8ArrayToBase64Url } from '@sd-jwt/utils';
 
 // This function creates a decoy value that can be used to obscure SD JWT payload.
 // The value is basically a hash of a random salt. So the value is not predictable.
@@ -11,5 +11,5 @@ export const createDecoy = async (
   const { hasher, alg } = hash;
   const salt = await saltGenerator(16);
   const decoy = await hasher(salt, alg);
-  return Uint8ArrayToBase64Url(decoy);
+  return uint8ArrayToBase64Url(decoy);
 };
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index ed90f03..610347a 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -1,4 +1,4 @@
-import { SDJWTException, Uint8ArrayToBase64Url } from '@sd-jwt/utils';
+import { SDJWTException, uint8ArrayToBase64Url } from '@sd-jwt/utils';
 import { Jwt } from './jwt';
 import { KBJwt } from './kbjwt';
 import { SDJwt, pack } from './sdjwt';
@@ -250,7 +250,7 @@ export class SDJwtInstance<ExtendedPayload extends SdJwtPayload> {
     }
     const { _sd_alg } = getSDAlgAndPayload(sdjwt.jwt.payload);
     const sdHash = await hasher(presentSdJwtWithoutKb, _sd_alg);
-    const sdHashStr = Uint8ArrayToBase64Url(sdHash);
+    const sdHashStr = uint8ArrayToBase64Url(sdHash);
     return sdHashStr;
   }
 
diff --git a/packages/core/src/jwt.ts b/packages/core/src/jwt.ts
index 1ecf9d0..a53362c 100644
--- a/packages/core/src/jwt.ts
+++ b/packages/core/src/jwt.ts
@@ -1,4 +1,4 @@
-import { Base64urlEncode, SDJWTException } from '@sd-jwt/utils';
+import { base64urlEncode, SDJWTException } from '@sd-jwt/utils';
 import type { Base64urlString, Signer, Verifier } from '@sd-jwt/types';
 import { decodeJwt } from '@sd-jwt/decode';
 
@@ -83,8 +83,8 @@ export class Jwt<
       return unsignedToken;
     }
 
-    const header = Base64urlEncode(JSON.stringify(this.header));
-    const payload = Base64urlEncode(JSON.stringify(this.payload));
+    const header = base64urlEncode(JSON.stringify(this.header));
+    const payload = base64urlEncode(JSON.stringify(this.payload));
     return `${header}.${payload}`;
   }
 
@@ -104,8 +104,8 @@ export class Jwt<
       throw new SDJWTException('Serialize Error: Invalid JWT');
     }
 
-    const header = Base64urlEncode(JSON.stringify(this.header));
-    const payload = Base64urlEncode(JSON.stringify(this.payload));
+    const header = base64urlEncode(JSON.stringify(this.header));
+    const payload = base64urlEncode(JSON.stringify(this.payload));
     const signature = this.signature;
     const compact = `${header}.${payload}.${signature}`;
     this.encoded = compact;
diff --git a/packages/core/src/kbjwt.ts b/packages/core/src/kbjwt.ts
index 4266a4b..550cc6a 100644
--- a/packages/core/src/kbjwt.ts
+++ b/packages/core/src/kbjwt.ts
@@ -1,4 +1,4 @@
-import { Base64urlEncode, SDJWTException } from '@sd-jwt/utils';
+import { SDJWTException } from '@sd-jwt/utils';
 import { Jwt } from './jwt';
 import {
   type JwtPayload,
diff --git a/packages/core/src/test/decoy.spec.ts b/packages/core/src/test/decoy.spec.ts
index 3e4e382..ceec48c 100644
--- a/packages/core/src/test/decoy.spec.ts
+++ b/packages/core/src/test/decoy.spec.ts
@@ -1,6 +1,6 @@
 import { createDecoy } from '../decoy';
 import { describe, expect, test } from 'vitest';
-import { Base64urlEncode } from '@sd-jwt/utils';
+import { base64urlEncode } from '@sd-jwt/utils';
 import { digest, generateSalt } from '@sd-jwt/crypto-nodejs';
 
 const hash = {
@@ -21,7 +21,7 @@ describe('Decoy', () => {
   //  *  Contents: ["6Ij7tM-a5iVPGboS5tmvVA", "email", "johndoe@example.com"]
   test('apply hasher and saltGenerator', async () => {
     const decoyValue = await createDecoy(hash, () =>
-      Base64urlEncode(
+      base64urlEncode(
         '["6Ij7tM-a5iVPGboS5tmvVA", "email", "johndoe@example.com"]',
       ),
     );
diff --git a/packages/decode/src/decode.ts b/packages/decode/src/decode.ts
index 551cbbf..fa73929 100644
--- a/packages/decode/src/decode.ts
+++ b/packages/decode/src/decode.ts
@@ -1,4 +1,4 @@
-import { Base64urlDecode, SDJWTException, Disclosure } from '@sd-jwt/utils';
+import { base64urlDecode, SDJWTException, Disclosure } from '@sd-jwt/utils';
 import {
   type Hasher,
   type HasherAndAlg,
@@ -20,8 +20,8 @@ export const decodeJwt = <
   }
 
   return {
-    header: JSON.parse(Base64urlDecode(header)),
-    payload: JSON.parse(Base64urlDecode(payload)),
+    header: JSON.parse(base64urlDecode(header)),
+    payload: JSON.parse(base64urlDecode(payload)),
     signature: signature,
   };
 };
diff --git a/packages/utils/src/base64url.ts b/packages/utils/src/base64url.ts
index 75c2ec6..02d7dde 100644
--- a/packages/utils/src/base64url.ts
+++ b/packages/utils/src/base64url.ts
@@ -1,8 +1,8 @@
 import { Base64 } from 'js-base64';
 
-export const Base64urlEncode = Base64.encodeURI;
+export const base64urlEncode = Base64.encodeURI;
 
-export const Base64urlDecode = Base64.decode;
+export const base64urlDecode = Base64.decode;
 
-export const Uint8ArrayToBase64Url = (input: Uint8Array): string =>
+export const uint8ArrayToBase64Url = (input: Uint8Array): string =>
   Base64.fromUint8Array(input, true);
diff --git a/packages/utils/src/disclosure.ts b/packages/utils/src/disclosure.ts
index b8eb97b..b05a207 100644
--- a/packages/utils/src/disclosure.ts
+++ b/packages/utils/src/disclosure.ts
@@ -1,7 +1,7 @@
 import {
-  Uint8ArrayToBase64Url,
-  Base64urlDecode,
-  Base64urlEncode,
+  uint8ArrayToBase64Url,
+  base64urlDecode,
+  base64urlEncode,
 } from './base64url';
 import { SDJWTException } from './error';
 import type {
@@ -45,16 +45,16 @@ export class Disclosure<T = unknown> {
   public static async fromEncode<T>(s: string, hash: HasherAndAlg) {
     const { hasher, alg } = hash;
     const digest = await hasher(s, alg);
-    const digestStr = Uint8ArrayToBase64Url(digest);
-    const item = JSON.parse(Base64urlDecode(s)) as DisclosureData<T>;
+    const digestStr = uint8ArrayToBase64Url(digest);
+    const item = JSON.parse(base64urlDecode(s)) as DisclosureData<T>;
     return Disclosure.fromArray<T>(item, { digest: digestStr, encoded: s });
   }
 
   public static fromEncodeSync<T>(s: string, hash: HasherAndAlgSync) {
     const { hasher, alg } = hash;
     const digest = hasher(s, alg);
-    const digestStr = Uint8ArrayToBase64Url(digest);
-    const item = JSON.parse(Base64urlDecode(s)) as DisclosureData<T>;
+    const digestStr = uint8ArrayToBase64Url(digest);
+    const item = JSON.parse(base64urlDecode(s)) as DisclosureData<T>;
     return Disclosure.fromArray<T>(item, { digest: digestStr, encoded: s });
   }
 
@@ -69,7 +69,7 @@ export class Disclosure<T = unknown> {
     if (!this._encoded) {
       // we use JSON.stringify to encode the data
       // It's the most reliable and universal way to encode JSON object
-      this._encoded = Base64urlEncode(JSON.stringify(this.decode()));
+      this._encoded = base64urlEncode(JSON.stringify(this.decode()));
     }
     return this._encoded;
   }
@@ -84,7 +84,7 @@ export class Disclosure<T = unknown> {
     const { hasher, alg } = hash;
     if (!this._digest) {
       const hash = await hasher(this.encode(), alg);
-      this._digest = Uint8ArrayToBase64Url(hash);
+      this._digest = uint8ArrayToBase64Url(hash);
     }
 
     return this._digest;
@@ -94,7 +94,7 @@ export class Disclosure<T = unknown> {
     const { hasher, alg } = hash;
     if (!this._digest) {
       const hash = hasher(this.encode(), alg);
-      this._digest = Uint8ArrayToBase64Url(hash);
+      this._digest = uint8ArrayToBase64Url(hash);
     }
 
     return this._digest;
diff --git a/packages/utils/src/test/base64url.spec.ts b/packages/utils/src/test/base64url.spec.ts
index 9b87ad6..b79cd6e 100644
--- a/packages/utils/src/test/base64url.spec.ts
+++ b/packages/utils/src/test/base64url.spec.ts
@@ -1,26 +1,26 @@
 import { describe, expect, test } from 'vitest';
 import {
-  Base64urlDecode,
-  Base64urlEncode,
-  Uint8ArrayToBase64Url,
+  base64urlDecode,
+  base64urlEncode,
+  uint8ArrayToBase64Url,
 } from '../base64url';
 
 describe('Base64url', () => {
   const raw = 'abcdefghijklmnopqrstuvwxyz';
   const encoded = 'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo';
   test('Encode', () => {
-    expect(Base64urlEncode(raw)).toStrictEqual(encoded);
+    expect(base64urlEncode(raw)).toStrictEqual(encoded);
   });
   test('Decode', () => {
-    expect(Base64urlDecode(encoded)).toStrictEqual(raw);
+    expect(base64urlDecode(encoded)).toStrictEqual(raw);
   });
   test('Encode and decode', () => {
     const str = 'hello world';
-    expect(Base64urlDecode(Base64urlEncode(str))).toStrictEqual(str);
+    expect(base64urlDecode(base64urlEncode(str))).toStrictEqual(str);
   });
   test('Uint8Array', () => {
     const str = 'hello world';
     const uint8 = new TextEncoder().encode(str);
-    expect(Uint8ArrayToBase64Url(uint8)).toStrictEqual(Base64urlEncode(str));
+    expect(uint8ArrayToBase64Url(uint8)).toStrictEqual(base64urlEncode(str));
   });
 });
diff --git a/packages/utils/src/test/disclosure.spec.ts b/packages/utils/src/test/disclosure.spec.ts
index 3b45663..fba00a3 100644
--- a/packages/utils/src/test/disclosure.spec.ts
+++ b/packages/utils/src/test/disclosure.spec.ts
@@ -1,7 +1,7 @@
 import { generateSalt, digest as hasher } from '@sd-jwt/crypto-nodejs';
 import { Disclosure } from '../disclosure';
 import { describe, expect, test } from 'vitest';
-import { Base64urlEncode, type SDJWTException } from '../index';
+import { base64urlEncode, type SDJWTException } from '../index';
 
 const hash = { alg: 'SHA256', hasher };
 
@@ -144,7 +144,7 @@ describe('Disclosure', () => {
   });
 
   test('digest disclosure #3', async () => {
-    const encoded = Base64urlEncode(TestDataDraft7.claimTests[0].contents);
+    const encoded = base64urlEncode(TestDataDraft7.claimTests[0].contents);
     expect(encoded).toStrictEqual(TestDataDraft7.claimTests[0].disclosure);
 
     const disclosure = await Disclosure.fromEncode(