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SEO: Fix canonical URL headache and resolve global hreflang errors across 65+ pages
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29 files changed

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‎app/blog/json-syntax-errors-study/layout.tsx‎

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import { Metadata } from 'next'
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export const metadata: Metadata = {
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title: '2026 Developer Report: The 10 Most Common JSON Syntax Errors',
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description: 'A comprehensive data study on why JSON fails and how modern developers can avoid common syntax pitfalls. Analysis of 1.2M payloads.',
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alternates: {
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canonical: 'https://wtkpro.site/blog/json-syntax-errors-study/',
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languages: {
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'en-US': 'https://wtkpro.site/blog/json-syntax-errors-study/',
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'x-default': 'https://wtkpro.site/blog/json-syntax-errors-study/',
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},
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},
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}
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export default function JsonStudyLayout({
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children,
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}: {
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children: React.ReactNode
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}) {
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return <>{children}</>
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}

‎app/disclaimer/page.tsx‎

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export const metadata = {
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title: 'Disclaimer & DMCA - WebToolkit Pro',
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description: 'Legal disclaimer and DMCA policy for WebToolkit Pro (wtkpro.site). Learn about our content usage and copyright policies.',
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alternates: {
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canonical: 'https://wtkpro.site/disclaimer/',
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languages: {
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'en-US': 'https://wtkpro.site/disclaimer/',
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'x-default': 'https://wtkpro.site/disclaimer/',
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},
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},
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}
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export default function DisclaimerPage() {

‎app/layout.tsx‎

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export const metadata: Metadata = {
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metadataBase: new URL('https://wtkpro.site'),
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alternates: {
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canonical: '/',
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languages: {
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'en-US': '/',
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'x-default': '/',
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},
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},
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title: 'WebToolkit Pro | 65+ Premium Developer Tools & Expert Guides',
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description: 'WebToolkit Pro offers 65+ free premium developer tools and expert guides. Secure, fast, and optimized for enterprise engineering. Format JSON and master SEO.',

‎app/not-found.tsx‎

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import React from 'react'
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import Link from 'next/link'
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import { Metadata } from 'next'
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import { Home, AlertCircle } from 'lucide-react'
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export const metadata: Metadata = {
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title: '404 - Tool Not Found | WebToolkit Pro',
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robots: {
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index: false,
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follow: true,
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},
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}
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export default function NotFound() {
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return (
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<div className="min-h-screen flex items-center justify-center bg-gray-50 dark:bg-slate-950 transition-colors duration-300">

‎app/terms/page.tsx‎

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export const metadata = {
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title: 'Terms of Service - WebToolkit Pro',
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description: 'WebToolkit Pro terms of service and usage agreement for wtkpro.site.'
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description: 'WebToolkit Pro terms of service and usage agreement for wtkpro.site.',
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alternates: {
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canonical: 'https://wtkpro.site/terms/',
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languages: {
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'en-US': 'https://wtkpro.site/terms/',
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'x-default': 'https://wtkpro.site/terms/',
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},
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},
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}
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export default function TermsPage() {

‎app/tools/adsense-calculator/layout.tsx‎

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import { Metadata } from 'next'
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export const metadata: Metadata = {
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title: 'AdSense Revenue Estimator | WebToolkit Pro',
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description: 'Calculate potential earnings from Google AdSense based on traffic, CTR, and CPC. Analyze revenue impact across different niches.',
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alternates: {
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canonical: 'https://wtkpro.site/tools/adsense-calculator/',
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languages: {
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'en-US': 'https://wtkpro.site/tools/adsense-calculator/',
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'x-default': 'https://wtkpro.site/tools/adsense-calculator/',
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},
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},
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}
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export default function AdSenseLayout({
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children,
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}: {
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children: React.ReactNode
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}) {
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return <>{children}</>
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}

‎app/tools/api-latency-calculator/layout.tsx‎

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import { Metadata } from 'next'
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export const metadata: Metadata = {
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title: 'API Latency Cost Calculator | WebToolkit Pro',
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description: 'Analyze the financial impact of network latency on your business revenue. Calculate conversion drops and ROI of performance optimization.',
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alternates: {
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canonical: 'https://wtkpro.site/tools/api-latency-calculator/',
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languages: {
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'en-US': 'https://wtkpro.site/tools/api-latency-calculator/',
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'x-default': 'https://wtkpro.site/tools/api-latency-calculator/',
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},
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},
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}
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export default function ApiLatencyLayout({
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children,
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}: {
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children: React.ReactNode
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}) {
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return <>{children}</>
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}

‎app/tools/binary-converter/layout.tsx‎

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import { Metadata } from 'next'
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export const metadata: Metadata = {
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title: 'Binary to Text & Decimal Converter | WebToolkit Pro',
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description: 'Convert between Binary, Decimal, Hexadecimal, and Plain Text. Essential utility for low-level programming and data analysis.',
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alternates: {
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canonical: 'https://wtkpro.site/tools/binary-converter/',
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languages: {
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'en-US': 'https://wtkpro.site/tools/binary-converter/',
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'x-default': 'https://wtkpro.site/tools/binary-converter/',
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},
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},
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}
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export default function BinaryConverterLayout({
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children,
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}: {
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children: React.ReactNode
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}) {
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return <>{children}</>
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}

‎app/tools/case-converter/layout.tsx‎

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import { Metadata } from 'next'
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export const metadata: Metadata = {
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title: 'Text Case Converter Pro | WebToolkit Pro',
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description: 'Instantly transform text into Uppercase, Lowercase, Title Case, Sentence Case, or camelCase. Clean and fast text manipulation tool.',
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alternates: {
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canonical: 'https://wtkpro.site/tools/case-converter/',
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languages: {
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'en-US': 'https://wtkpro.site/tools/case-converter/',
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'x-default': 'https://wtkpro.site/tools/case-converter/',
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},
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},
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}
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export default function CaseConverterLayout({
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children,
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}: {
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children: React.ReactNode
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}) {
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return <>{children}</>
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}

‎app/tools/cdn-readiness-tester/layout.tsx‎

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import { Metadata } from 'next'
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export const metadata: Metadata = {
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title: 'CDN & Edge Readiness Tester | WebToolkit Pro',
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description: 'Inspect HTTP headers and CDN delivery performance. Verify Cache-Control, ETag, and Edge Runtime headers for optimal content delivery.',
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alternates: {
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canonical: 'https://wtkpro.site/tools/cdn-readiness-tester/',
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languages: {
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'en-US': 'https://wtkpro.site/tools/cdn-readiness-tester/',
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'x-default': 'https://wtkpro.site/tools/cdn-readiness-tester/',
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},
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},
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}
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export default function CdnReadinessLayout({
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children,
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}: {
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children: React.ReactNode
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}) {
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return <>{children}</>
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}

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