diff --git a/README.md b/README.md
index 3a570b1..565ccc0 100644
--- a/README.md
+++ b/README.md
@@ -53,14 +53,14 @@ log('debug log')
 Create a log entry with a red cross.
 
 ```typescript
-import log from '@flex-development/log'
+import log, { LogLevel } from '@flex-development/log'
 
 /**
  * @file Examples - error log
  * @module log/docs/examples/error
  */
 
-log('error log', { level: 'ERROR' })
+log('error log', { level: LogLevel.ERROR })
 ```
 
 #### Info
@@ -68,14 +68,14 @@ log('error log', { level: 'ERROR' })
 Create a log entry with a blue info symbol.
 
 ```typescript
-import log from '@flex-development/log'
+import log, { LogLevel } from '@flex-development/log'
 
 /**
  * @file Examples - info log
  * @module log/docs/examples/info
  */
 
-log('info log', { level: 'INFO' })
+log('info log', { level: LogLevel.INFO })
 ```
 
 #### Success
@@ -83,14 +83,14 @@ log('info log', { level: 'INFO' })
 Create a log entry with a green tick mark.
 
 ```typescript
-import log from '@flex-development/log'
+import log, { LogLevel } from '@flex-development/log'
 
 /**
  * @file Examples - success log
  * @module log/docs/examples/success
  */
 
-log('success log', { level: 'SUCCESS' })
+log('success log', { level: LogLevel.SUCCESS })
 ```
 
 #### Warning
@@ -98,20 +98,20 @@ log('success log', { level: 'SUCCESS' })
 Create a log entry with a yellow exclamation point.
 
 ```typescript
-import log from '@flex-development/log'
+import log, { LogLevel } from '@flex-development/log'
 
 /**
  * @file Examples - warning log
  * @module log/docs/examples/warning
  */
 
-log('warning log', { level: 'WARN' })
+log('warning log', { level: LogLevel.WARN })
 ```
 
 ### Options
 
 ```typescript
-export interface LogOptions {
+interface LogOptions {
   /**
    * Log arguments.
    *
@@ -159,7 +159,15 @@ export interface LogOptions {
   silent?: boolean
 }
 
-type Level = 'DEBUG' | 'ERROR' | 'INFO' | 'SUCCESS' | 'WARN'
+enum LogLevel {
+  DEBUG = 'debug',
+  ERROR = 'error',
+  INFO = 'info',
+  SUCCESS = 'success',
+  WARN = 'warn'
+}
+
+export type Level = keyof typeof LogLevel | LogLevel
 ```
 
 ## Built With
diff --git a/docs/examples/error.ts b/docs/examples/error.ts
index 6cd1032..26d3317 100644
--- a/docs/examples/error.ts
+++ b/docs/examples/error.ts
@@ -1,8 +1,8 @@
-import log from '@flex-development/log'
+import log, { LogLevel } from '@flex-development/log'
 
 /**
  * @file Examples - error log
  * @module log/docs/examples/error
  */
 
-log('error log', { level: 'ERROR' })
+log('error log', { level: LogLevel.ERROR })
diff --git a/docs/examples/info.ts b/docs/examples/info.ts
index f4e4300..a4489cf 100644
--- a/docs/examples/info.ts
+++ b/docs/examples/info.ts
@@ -1,8 +1,8 @@
-import log from '@flex-development/log'
+import log, { LogLevel } from '@flex-development/log'
 
 /**
  * @file Examples - info log
  * @module log/docs/examples/info
  */
 
-log('info log', { level: 'INFO' })
+log('info log', { level: LogLevel.INFO })
diff --git a/docs/examples/success.ts b/docs/examples/success.ts
index e694476..9ca58d3 100644
--- a/docs/examples/success.ts
+++ b/docs/examples/success.ts
@@ -1,8 +1,8 @@
-import log from '@flex-development/log'
+import log, { LogLevel } from '@flex-development/log'
 
 /**
  * @file Examples - success log
  * @module log/docs/examples/success
  */
 
-log('success log', { level: 'SUCCESS' })
+log('success log', { level: LogLevel.SUCCESS })
diff --git a/docs/examples/warning.ts b/docs/examples/warning.ts
index 2f07ed2..17e4646 100644
--- a/docs/examples/warning.ts
+++ b/docs/examples/warning.ts
@@ -1,8 +1,8 @@
-import log from '@flex-development/log'
+import log, { LogLevel } from '@flex-development/log'
 
 /**
  * @file Examples - warning log
  * @module log/docs/examples/warning
  */
 
-log('warning log', { level: 'WARN' })
+log('warning log', { level: LogLevel.WARN })
diff --git a/src/__tests__/log.functional.spec.ts b/src/__tests__/log.functional.spec.ts
index 2e83670..524197d 100644
--- a/src/__tests__/log.functional.spec.ts
+++ b/src/__tests__/log.functional.spec.ts
@@ -1,9 +1,9 @@
 import defaults from '@log/config/defaults.config'
 import type { LogOptions } from '@log/interfaces'
 import format from '@log/utils/format.util'
+import normalizeOptions from '@log/utils/normalize-options.util'
 import type { RestoreConsole } from 'jest-mock-console'
 import mockConsole from 'jest-mock-console'
-import merge from 'lodash.merge'
 import sh from 'shelljs'
 import testSubject from '../log'
 
@@ -13,10 +13,13 @@ import testSubject from '../log'
  */
 
 jest.mock('@log/utils/format.util')
+jest.mock('@log/utils/normalize-options.util')
 
 const mockSH = sh as jest.Mocked<typeof sh>
 const mockFormat = format as jest.MockedFunction<typeof format>
-const mockMerge = merge as jest.MockedFunction<typeof merge>
+const mockNormalizeOptions = normalizeOptions as jest.MockedFunction<
+  typeof normalizeOptions
+>
 
 describe('functional:log', () => {
   const restoreConsole: RestoreConsole = mockConsole(['log'])
@@ -24,7 +27,7 @@ describe('functional:log', () => {
 
   afterAll(() => restoreConsole())
 
-  it('should merge options with defaults', () => {
+  it('should normalize options', () => {
     // Arrange
     const options: LogOptions = { level: 'ERROR' }
 
@@ -32,9 +35,7 @@ describe('functional:log', () => {
     testSubject('', options)
 
     // Expect
-    expect(mockMerge).toBeCalledTimes(1)
-    expect(mockMerge.mock.calls[0][1]).toStrictEqual(defaults)
-    expect(mockMerge.mock.calls[0][2]).toStrictEqual(options)
+    expect(mockNormalizeOptions.mock.calls[0][0]).toMatchObject(options)
   })
 
   it('should format log entry', () => {
@@ -47,7 +48,7 @@ describe('functional:log', () => {
 
     // Expect
     expect(mockFormat).toBeCalledTimes(1)
-    expect(mockFormat).toBeCalledWith(data, options)
+    expect(mockFormat).toBeCalledWith(data, mockNormalizeOptions(options))
   })
 
   describe('options', () => {
diff --git a/src/config/defaults.config.ts b/src/config/defaults.config.ts
index b89990e..b211645 100644
--- a/src/config/defaults.config.ts
+++ b/src/config/defaults.config.ts
@@ -1,3 +1,4 @@
+import { LogLevel } from '@log/enums/log-level.enum'
 import type { LogOptions } from '@log/interfaces'
 
 /**
@@ -9,5 +10,5 @@ export default Object.freeze({
   args: [],
   bold: { args: true, data: false },
   color: {},
-  level: 'DEBUG'
+  level: LogLevel.DEBUG
 }) as Readonly<Required<Pick<LogOptions, 'args' | 'bold' | 'color' | 'level'>>>
diff --git a/src/enums/log-figure.enum.ts b/src/enums/log-figure.enum.ts
index 78d5a0f..2fefc22 100644
--- a/src/enums/log-figure.enum.ts
+++ b/src/enums/log-figure.enum.ts
@@ -1,5 +1,5 @@
 import figures from 'figures'
-import type { Level } from './log-level.enum'
+import type { LogLevel } from './log-level.enum'
 
 /**
  * @file Enums - LogFigure
@@ -14,10 +14,11 @@ import type { Level } from './log-level.enum'
  * @readonly
  * @enum {string}
  */
-export const LogFigure: Readonly<Record<Level, string>> = Object.freeze({
-  DEBUG: '',
-  ERROR: figures.cross,
-  INFO: figures.info,
-  SUCCESS: figures.tick,
-  WARN: '!'
-})
+export const LogFigure: Readonly<Record<keyof typeof LogLevel, string>> =
+  Object.freeze({
+    DEBUG: '',
+    ERROR: figures.cross,
+    INFO: figures.info,
+    SUCCESS: figures.tick,
+    WARN: '!'
+  })
diff --git a/src/enums/log-level.enum.ts b/src/enums/log-level.enum.ts
index 93409ce..1927cb0 100644
--- a/src/enums/log-level.enum.ts
+++ b/src/enums/log-level.enum.ts
@@ -11,7 +11,5 @@ export enum LogLevel {
   ERROR = 'error',
   INFO = 'info',
   SUCCESS = 'success',
-  WARN = 'warning'
+  WARN = 'warn'
 }
-
-export type Level = keyof typeof LogLevel
diff --git a/src/index.ts b/src/index.ts
index 96a0105..fec068e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -5,4 +5,8 @@ import log from './log'
  * @module log
  */
 
+export { LogLevel } from './enums/log-level.enum'
+export type { LogOptions } from './interfaces'
+export type { Level } from './types'
+
 export default log
diff --git a/src/interfaces/log-options.interface.ts b/src/interfaces/log-options.interface.ts
index 0107909..6cb9d37 100644
--- a/src/interfaces/log-options.interface.ts
+++ b/src/interfaces/log-options.interface.ts
@@ -1,5 +1,5 @@
 import type { NullishString } from '@flex-development/tutils'
-import type { Level } from '@log/enums/log-level.enum'
+import type { Level } from '@log/types'
 import figures from 'figures'
 import type { LogOptionsBold } from './log-options-bold.interface'
 import type { LogOptionsColor } from './log-options-color.interface'
@@ -42,7 +42,7 @@ export interface LogOptions {
   /**
    * Log level.
    *
-   * @default 'DEBUG'
+   * @default LogLevel.DEBUG
    */
   level?: Level
 
diff --git a/src/log.ts b/src/log.ts
index c218bb3..e1fc5c1 100644
--- a/src/log.ts
+++ b/src/log.ts
@@ -1,15 +1,15 @@
 import type { NullishString } from '@flex-development/tutils'
 import defaults from '@log/config/defaults.config'
-import type { Level } from '@log/enums/log-level.enum'
 import type {
   LogOptions,
   LogOptionsBold,
   LogOptionsColor
 } from '@log/interfaces'
+import type { Level } from '@log/types'
 import type { Color } from 'chalk'
 import figs from 'figures'
-import merge from 'lodash.merge'
 import format from './utils/format.util'
+import normalizeOptions from './utils/normalize-options.util'
 
 /**
  * @file Log Method
@@ -34,14 +34,14 @@ import format from './utils/format.util'
  * @param {typeof Color} [options.color.data] - Set log data color
  * @param {typeof Color} [options.color.figure] - Set log figure color
  * @param {keyof typeof figs | NullishString} [options.figure] - Override figure
- * @param {Level} [options.level='DEBUG'] - Log level
+ * @param {Level} [options.level=LogLevel.DEBUG] - Log level
  * @param {boolean} [options.shell] - Use [`echo`][2] instead of `console.log`
  * @param {boolean} [options.silent] - Do not log any output
  * @return {string} Formatted log entry
  */
 const log = (data: any, options: LogOptions = defaults): string => {
   // Merge options with defaults
-  const $options = merge({}, defaults, options)
+  const $options = normalizeOptions(options)
 
   // Create formatted log entry
   const entry = format(data, $options)
diff --git a/src/types/Level.ts b/src/types/Level.ts
new file mode 100644
index 0000000..cff324c
--- /dev/null
+++ b/src/types/Level.ts
@@ -0,0 +1,11 @@
+import type { LogLevel } from '@log/enums/log-level.enum'
+
+/**
+ * @file Type Definitions - Level
+ * @module log/types/Level
+ */
+
+/**
+ * Log levels.
+ */
+export type Level = keyof typeof LogLevel | LogLevel
diff --git a/src/types/index.ts b/src/types/index.ts
new file mode 100644
index 0000000..ef3649e
--- /dev/null
+++ b/src/types/index.ts
@@ -0,0 +1,6 @@
+/**
+ * @file Entry Point - Type Definitions
+ * @module log/types
+ */
+
+export type { Level } from './Level'
diff --git a/src/utils/__mocks__/normalize-options.util.ts b/src/utils/__mocks__/normalize-options.util.ts
new file mode 100644
index 0000000..f31eb6f
--- /dev/null
+++ b/src/utils/__mocks__/normalize-options.util.ts
@@ -0,0 +1,9 @@
+/**
+ * @file User Module Mock - normalizeOptions
+ * @module utils/mocks/normalizeOptions
+ * @see https://jestjs.io/docs/manual-mocks#mocking-user-modules
+ */
+
+export default jest.fn((...args) => {
+  return jest.requireActual('../normalize-options.util').default(...args)
+})
diff --git a/src/utils/__tests__/figure.util.spec.ts b/src/utils/__tests__/figure.util.spec.ts
index eab8586..2fc950d 100644
--- a/src/utils/__tests__/figure.util.spec.ts
+++ b/src/utils/__tests__/figure.util.spec.ts
@@ -1,14 +1,16 @@
 import defaults from '@log/config/defaults.config'
 import { LogColor } from '@log/enums/log-color.enum'
 import { LogFigure } from '@log/enums/log-figure.enum'
+import { LogLevel } from '@log/enums/log-level.enum'
 import type { LogOptions } from '@log/interfaces'
+import normalizeOptions from '@log/utils/normalize-options.util'
 import type { Testcase } from '@tests/utils/types'
 import ch from 'chalk'
 import testSubject from '../figure.util'
 
 /**
  * @file Unit Tests - figure
- * @module log/utils/figure
+ * @module log/utils/tests/unit/figure
  */
 
 const mockCH = ch as jest.Mocked<typeof ch>
@@ -25,7 +27,7 @@ describe('unit:utils/figure', () => {
       expected: '',
       options: defaults,
       result: 'return empty string',
-      state: `options.level === 'DEBUG' && !options.figure`
+      state: `options.level === '${LogLevel.DEBUG}' && !options.figure`
     },
     {
       expected: '',
@@ -33,30 +35,66 @@ describe('unit:utils/figure', () => {
       result: 'return empty string',
       state: 'options.figure === null'
     },
+    {
+      expected: '',
+      options: { figure: '' },
+      result: 'return empty string',
+      state: 'options.figure is empty string (trimmed)'
+    },
+    {
+      expected: '',
+      options: { figure: ' ' },
+      result: 'return empty string',
+      state: 'options.figure is empty string (untrimmed)'
+    },
     {
       expected: '?',
       options: { figure: '?' },
       result: 'return string matching ?',
       state: 'options.figure is non-empty string'
     },
+    {
+      expected: LogFigure.ERROR,
+      options: { level: LogLevel.ERROR },
+      result: `return string matching ${LogFigure.ERROR}`,
+      state: `options.level === '${LogLevel.ERROR}'`
+    },
     {
       expected: LogFigure.ERROR,
       options: { level: 'ERROR' },
       result: `return string matching ${LogFigure.ERROR}`,
       state: `options.level === 'ERROR'`
     },
+    {
+      expected: LogFigure.INFO,
+      options: { level: LogLevel.INFO },
+      result: `return string matching ${LogFigure.INFO}`,
+      state: `options.level === '${LogLevel.INFO}'`
+    },
     {
       expected: LogFigure.INFO,
       options: { level: 'INFO' },
       result: `return string matching ${LogFigure.INFO}`,
       state: `options.level === 'INFO'`
     },
+    {
+      expected: LogFigure.SUCCESS,
+      options: { level: LogLevel.SUCCESS },
+      result: `return string matching ${LogFigure.SUCCESS}`,
+      state: `options.level === '${LogLevel.SUCCESS}'`
+    },
     {
       expected: LogFigure.SUCCESS,
       options: { level: 'SUCCESS' },
       result: `return string matching ${LogFigure.SUCCESS}`,
       state: `options.level === 'SUCCESS'`
     },
+    {
+      expected: LogFigure.WARN,
+      options: { level: LogLevel.WARN },
+      result: `return string matching ${LogFigure.WARN}`,
+      state: `options.level === '${LogLevel.WARN}'`
+    },
     {
       expected: LogFigure.WARN,
       options: { level: 'WARN' },
@@ -67,11 +105,11 @@ describe('unit:utils/figure', () => {
 
   const name = 'should $result if $state'
 
-  it.each<Case>(cases)(name, testcase => {
+  it.each<Case>(cases)(name, ({ expected, options }) => {
     // Arrange
-    const { expected, options } = testcase
-    const { color = defaults.color, figure, level = defaults.level } = options
-    const spy_ch_bold_method = color?.figure ?? LogColor[level]
+    options = normalizeOptions(options)
+    const { color = defaults.color, figure, level = 'DEBUG' } = options
+    const spy_ch_bold_method = color.figure ?? LogColor[level]
     const spy_ch_bold = jest.spyOn(mockCH.bold, spy_ch_bold_method)
 
     // Act
diff --git a/src/utils/__tests__/format.util.functional.spec.ts b/src/utils/__tests__/format.util.functional.spec.ts
index 1d5004f..04469b2 100644
--- a/src/utils/__tests__/format.util.functional.spec.ts
+++ b/src/utils/__tests__/format.util.functional.spec.ts
@@ -1,6 +1,9 @@
 import defaults from '@log/config/defaults.config'
+import { LogLevel } from '@log/enums/log-level.enum'
 import type { LogOptions } from '@log/interfaces'
+import type { Level } from '@log/types'
 import figure from '@log/utils/figure.util'
+import normalizeOptions from '@log/utils/normalize-options.util'
 import type { TestcaseCalled } from '@tests/utils/types'
 import type { Color } from 'chalk'
 import ch from 'chalk'
@@ -9,13 +12,17 @@ import testSubject from '../format.util'
 
 /**
  * @file Functional Tests - format
- * @module log/utils/tests/format
+ * @module log/utils/tests/functional/format
  */
 
 jest.mock('@log/utils/figure.util')
+jest.mock('@log/utils/normalize-options.util')
 
 const mockCH = ch as jest.Mocked<typeof ch>
 const mockFigure = figure as jest.MockedFunction<typeof figure>
+const mockNormalizeOptions = normalizeOptions as jest.MockedFunction<
+  typeof normalizeOptions
+>
 
 describe('functional:utils/format', () => {
   type CaseCalled = Omit<TestcaseCalled, 'call'> & {
@@ -41,7 +48,7 @@ describe('functional:utils/format', () => {
 
     it('should add log figure', () => {
       expect(mockFigure).toBeCalledTimes(1)
-      expect(mockFigure).toBeCalledWith(defaults)
+      expect(mockFigure).toBeCalledWith(mockNormalizeOptions(defaults))
     })
 
     it('should format log arguments', () => {
@@ -86,6 +93,17 @@ describe('functional:utils/format', () => {
   })
 
   describe('options', () => {
+    it('should normalize options', () => {
+      // Arrange
+      const options = { level: LogLevel.INFO as Level }
+
+      // Act
+      testSubject(`${options.level} message`, options)
+
+      // Expect
+      expect(mockNormalizeOptions.mock.calls[0][0]).toMatchObject(options)
+    })
+
     describe('options.bold', () => {
       const cases: CaseCalled[] = [
         {
@@ -96,7 +114,7 @@ describe('functional:utils/format', () => {
           result: 'bold log arguments'
         },
         {
-          calledWith: data_obj.data,
+          calledWith: mockCH.gray(data_obj.data),
           data: data_obj.data,
           expected: 1,
           options: { args: [], bold: { data: true } },
diff --git a/src/utils/__tests__/normalize-options.util.functional.spec.ts b/src/utils/__tests__/normalize-options.util.functional.spec.ts
new file mode 100644
index 0000000..d0d1851
--- /dev/null
+++ b/src/utils/__tests__/normalize-options.util.functional.spec.ts
@@ -0,0 +1,53 @@
+import defaults from '@log/config/defaults.config'
+import { LogLevel } from '@log/enums/log-level.enum'
+import type { LogOptions } from '@log/interfaces'
+import type { Level } from '@log/types'
+import type { Testcase } from '@tests/utils/types'
+import merge from 'lodash.merge'
+import testSubject from '../normalize-options.util'
+
+/**
+ * @file Functional Tests - normalizeOptions
+ * @module log/utils/tests/functional/normalizeOptions
+ */
+
+const mockMerge = merge as jest.MockedFunction<typeof merge>
+
+describe('functional:utils/normalizeOptions', () => {
+  it('should merge options with defaults', () => {
+    // Arrange
+    const options: LogOptions = { level: 'ERROR' }
+
+    // Act
+    testSubject(options)
+
+    // Expect
+    expect(mockMerge).toBeCalledTimes(1)
+    expect(mockMerge.mock.calls[0]).toMatchObject({})
+    expect(mockMerge.mock.calls[0][1]).toMatchObject(defaults)
+    expect(mockMerge.mock.calls[0][2]).toMatchObject(options)
+  })
+
+  describe('options.level', () => {
+    type Case = Testcase<keyof typeof LogLevel> & { level: Level }
+
+    const cases: [Case, Case][] = Object.keys(LogLevel).map(key => {
+      const level = key as keyof typeof LogLevel
+
+      return [
+        { expected: level, level },
+        { expected: level, level: LogLevel[level] }
+      ]
+    })
+
+    const name = `should === '$expected' if options.level === '$level'`
+
+    it.each<Case>(cases.flat())(name, testcase => {
+      // Arrange
+      const { expected, level } = testcase
+
+      // Act + Expect
+      expect(testSubject({ level }).level).toBe(expected)
+    })
+  })
+})
diff --git a/src/utils/figure.util.ts b/src/utils/figure.util.ts
index 06a45ac..f97872e 100644
--- a/src/utils/figure.util.ts
+++ b/src/utils/figure.util.ts
@@ -2,10 +2,12 @@ import type { NullishString } from '@flex-development/tutils'
 import defaults from '@log/config/defaults.config'
 import { LogColor } from '@log/enums/log-color.enum'
 import { LogFigure } from '@log/enums/log-figure.enum'
-import type { Level } from '@log/enums/log-level.enum'
+import { LogLevel as LL } from '@log/enums/log-level.enum'
 import type { LogOptions, LogOptionsColor } from '@log/interfaces'
+import type { Level } from '@log/types'
 import ch from 'chalk'
 import figs from 'figures'
+import normalizeOptions from './normalize-options.util'
 
 /**
  * @file Utility - figure
@@ -15,7 +17,8 @@ import figs from 'figures'
 /**
  * Selects and colors a log figure. An empty string will be returned if:
  *
- * - `options.level === 'DEBUG' && !options.figure`
+ * - `options.level.toLowerCase() === 'debug' && !options.figure`
+ * - `options.figure && options.figure.trim() === ''`
  * - `options.figure === null`
  *
  * The figure and figure color are pre-determined by `options.level`, but can be
@@ -24,20 +27,24 @@ import figs from 'figures'
  * @param {LogOptions} [options=defaults] - `log` options
  * @param {LogOptionsColor} [options.color={figure:undefined}] - Override color
  * @param {keyof typeof figs | NullishString} [options.figure] - Override figure
- * @param {Level} [options.level='DEBUG'] - Log level
+ * @param {Level} [options.level=LogLevel.DEBUG] - Log level
  * @return {string} Colorized log figure or empty string
  */
 const figure = (options: LogOptions = defaults): string => {
   // Spread options
-  const { color = defaults.color, figure, level = defaults.level } = options
+  const {
+    color,
+    figure: fig,
+    level = defaults.level
+  } = normalizeOptions(options)
 
-  // Omit figure
-  if ((level === 'DEBUG' && !figure) || figure === null) return ''
+  // Omit if in in debug mode
+  if (level.toLowerCase() === LL.DEBUG && !fig) return ''
 
-  // Select figure
-  const fig = figure || LogFigure[level]
+  // Omit if figure is null or an empty string
+  if (fig === null || fig === '' || (fig && fig.trim() === '')) return ''
 
-  return ch.bold[color?.figure ?? LogColor[level]](fig)
+  return ch.bold[color?.figure ?? LogColor[level]](fig || LogFigure[level])
 }
 
 export default figure
diff --git a/src/utils/format.util.ts b/src/utils/format.util.ts
index 78d200a..bca08ad 100644
--- a/src/utils/format.util.ts
+++ b/src/utils/format.util.ts
@@ -1,17 +1,18 @@
 import type { NullishString } from '@flex-development/tutils'
 import defaults from '@log/config/defaults.config'
 import { LogColor } from '@log/enums/log-color.enum'
-import type { Level } from '@log/enums/log-level.enum'
 import type {
   LogOptions,
   LogOptionsBold,
   LogOptionsColor
 } from '@log/interfaces'
+import type { Level } from '@log/types'
 import type { Color } from 'chalk'
 import ch from 'chalk'
 import figs from 'figures'
 import util from 'util'
 import figure from './figure.util'
+import normalizeOptions from './normalize-options.util'
 
 /**
  * @file Utility - format
@@ -33,10 +34,13 @@ import figure from './figure.util'
  * @param {typeof Color} [options.color.data] - Set log data color
  * @param {typeof Color} [options.color.figure] - Set log figure color
  * @param {keyof typeof figs | NullishString} [options.figure] - Override figure
- * @param {Level} [options.level='DEBUG'] - Log level
+ * @param {Level} [options.level=LogLevel.DEBUG] - Log level
  * @return {string} Log data and arguments as string
  */
 const format = (data: any, options: LogOptions = defaults): string => {
+  // Normalize options
+  options = normalizeOptions(options)
+
   /**
    * Returns true if `value` is a function or object.
    *
diff --git a/src/utils/normalize-options.util.ts b/src/utils/normalize-options.util.ts
new file mode 100644
index 0000000..f4f1088
--- /dev/null
+++ b/src/utils/normalize-options.util.ts
@@ -0,0 +1,47 @@
+import type { NullishString } from '@flex-development/tutils'
+import defaults from '@log/config/defaults.config'
+import type {
+  LogOptions,
+  LogOptionsBold,
+  LogOptionsColor
+} from '@log/interfaces'
+import type { Level } from '@log/types'
+import type { Color } from 'chalk'
+import figs from 'figures'
+import merge from 'lodash.merge'
+
+/**
+ * @file Utility - normalizeOptions
+ * @module log/utils/normalizeOptions
+ */
+
+/**
+ * Merges default options and normalizes resulting options.
+ *
+ * @param {LogOptions} [options={}] - `log` options
+ * @param {any[]} [options.args=[]] - Log arguments
+ * @param {LogOptionsBold} [options.bold={args:true}] - Bold logs
+ * @param {boolean} [options.bold.args=true] - Bold log arguments
+ * @param {boolean} [options.bold.data] - Bold log data
+ * @param {LogOptionsColor} [options.color={args:'white'}] - Override colors
+ * @param {typeof Color} [options.color.args='white'] - Set log arguments color
+ * @param {typeof Color} [options.color.data] - Set log data color
+ * @param {typeof Color} [options.color.figure] - Set log figure color
+ * @param {keyof typeof figs | NullishString} [options.figure] - Override figure
+ * @param {Level} [options.level=LogLevel.DEBUG] - Log level
+ * @param {boolean} [options.shell] - Use [`echo`][2] instead of `console.log`
+ * @param {boolean} [options.silent] - Do not log any output
+ * @return {LogOptions} Normalized log level
+ */
+const normalizeOptions = (options: LogOptions = {}): LogOptions => {
+  // Merge options with defaults
+  const opts: LogOptions = merge({}, defaults, options)
+
+  // Normalize options.level
+  if (opts.level) opts.level = opts.level?.toUpperCase() as LogOptions['level']
+
+  // Return normalized options
+  return opts
+}
+
+export default normalizeOptions