Developer & Business Productivity Suite
High-utility, client-side tools designed for businesses, developers, marketers, and daily webmasters. Instant results, zero ads, no sign-ups required.
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Try searching for keywords like "WhatsApp", "GST", "Invoice", "SEO", or "QR Code".
Most Popular & Essential Utilities
Free Invoice Generator
Create beautiful, professional client invoices with custom company logo, itemized billing, Indian GST tax rates, and instant PDF printing.
WhatsApp Link Generator
Generate clean wa.me click-to-chat links with custom pre-filled messages and instant QR codes for Instagram bio, Facebook ads, and print cards.
QR Code Generator
Create high-resolution, customized QR codes for URLs, Contact vCards, WiFi networks, and text. Download in sharp PNG & vector SVG formats.
GST Calculator India
Calculate Inclusive or Exclusive GST with CGST, SGST, and IGST breakdowns for 5%, 12%, 18%, and 28% tax slabs. Features reverse tax deduction.
Marketing & Social Growth
WhatsApp Link Generator
Generate instant wa.me click-to-chat links with custom pre-filled message encoding and printable QR code for social bios and ads.
QR Code Generator
Create high-resolution, customized QR codes for URLs, Contact vCards, WiFi networks, and text. Download in PNG & SVG formats.
Meta Tags & Social Preview
Simulate how your webpage looks on Google SERP, Facebook, X (Twitter), and LinkedIn. Validate title character counts, descriptions, and OG banners.
Finance, Invoicing & Tax Calculators
Free Invoice Generator
Create clean, branded invoices with itemized billing lines, automatic tax rate calculations, currency switcher, and 1-click PDF download.
GST Calculator India
Calculate Inclusive or Exclusive GST with CGST, SGST, and IGST breakdowns for 5%, 12%, 18%, and 28% slabs.
Profit Margin Calculator
Calculate Gross Profit, Markup Percentage, and Selling Price effortlessly. Perfect for eCommerce founders, retail stores, and service agencies.
Website Cost Estimator
Calculate realistic development costs for custom business websites, eCommerce portals, and SaaS applications with granular feature selection.
SEO, Indexing & Structured Data
Free SEO Audit Tool
Comprehensive on-page and technical SEO auditor. Checks title tags, meta descriptions, heading structures, image alt texts, and indexability scores.
Google Index & Cache Checker
Quickly inspect if your webpage is indexed on Google, view Google's cached snapshot date, and verify robots crawling indexability in one click.
Schema JSON-LD Generator
Build clean, valid Schema.org structured data for LocalBusiness, Organization, Person, Article, FAQ, and Product to earn Google Rich Snippets stars.
Robots.txt Validator & Tester
Test and validate your robots.txt file for syntax errors, check Googlebot crawler directives, verify sitemap locations, and simulate URL blocking.
Speed, Performance & Security
Google PageSpeed Checker
Analyze live website speed and Core Web Vitals (LCP, INP, CLS) powered by Google Lighthouse. Get actionable performance fixes for mobile & desktop.
SSL & Security Checker
Inspect SSL certificate validity, issuer authority, expiration date countdown, TLS protocol versions, and HTTPS configuration grade for any domain.
Legal & Policy Compliance
Privacy Policy Generator
Generate customized, legally compliant Privacy Policy documents tailored for websites, blogs, and SaaS apps complying with GDPR, CCPA, and India DPDP standards.
Frequently Asked Questions
Everything you need to know about NikhilWorks free tools suite.
Are all 14 tools on this hub 100% free?
Yes! Every tool listed in this suite is 100% free with unlimited usage. There are no paywalls, hidden limits, watermarks, or credit card requirements.
Is my data secure when using these tools?
Absolutely. All tools run locally in your browser using modern client-side JavaScript. We do not store, log, or track your entered business figures, phone numbers, or invoices.
Can I use generated invoices, QR codes & schemas commercially?
Yes! All generated outputs including PDF invoices, QR codes, structured schema JSON-LD, and policy agreements can be used directly for client projects and personal business without attribution.
Can Nikhil Gupta build custom software or APIs for my business?
Yes! From bespoke ERP/CRM portals to WhatsApp automation bots, payment gateway flows, and AI agents, Nikhil Gupta provides custom full-stack web and software engineering.