SopKit is a free online tools platform with 405+ browser-based utilities across 12+ categories. Every tool is designed to work instantly without registration, software installation, or file uploads to external servers. We prioritize privacy-first processing — most tools run entirely in your browser.

• Completely Free — No hidden fees, premium tiers, or usage limits
• Privacy-First — 95% of tools process data locally; files never leave your device
• No Signup Required — Start using any tool instantly with zero friction
• 405+ Tools & Growing — From image compression to SEO analysis, we cover every common workflow
• Fast & Modern — Built on Next.js 16 with optimized Core Web Vitals
• Mobile-Friendly — Fully responsive design works on all devices

Free image tools online for compression, resizing, conversion, background removal, and editing. Supports PNG, JPG, WebP, AVIF, GIF, and more.

Popular: Image Compressor · Image Converter · Image Resizer · Background Remover · Image Cropper · Favicon Generator

Free PDF tools online for merging, splitting, compressing, converting, and editing PDF documents.

Popular: PDF Merger · PDF Splitter · PDF Compressor · PDF to Word · Word to PDF

Free video tools online for converting, compressing, and editing videos.

Free audio tools online including text to speech converter and guitar tuner.

Free text tools online for word counting, case conversion, text comparison, ASCII converters, and more.

Free SEO tools online for meta tag generation, sitemap creation, keyword research, backlink checking, and SEO auditing.

Popular: Meta Tag Generator · Sitemap Generator · SEO Audit Tool · Keyword Research Tool · Backlink Checker

Free developer tools online for JSON formatting, Base64 encoding, regex testing, API key testing, code formatting, and cryptographic hashing.

Popular: JSON Formatter · Base64 Encode/Decode · UUID Generator · Hash Generator · API Key Testers

Free calculators online including BMI, loan, mortgage, percentage, and student-specific calculators.

Free generators online for passwords, QR codes, AI content, business names, and more.

Free exam tools for photo resizing (SSC, UPSC, NEET, JEE, PAN card), signature resizing, and form image preparation.

Free downloaders for YouTube, Instagram, TikTok, Facebook, Twitter, Reddit, and 40+ platforms.

• 405+ free online tools across 12 categories
• Privacy-first architecture — client-side processing for most tools
• Structured data (JSON-LD) — SoftwareApplication, FAQPage, HowTo, BreadcrumbList schemas on every tool page
• Dynamic XML sitemap with prioritized URLs
• LLM-optimized index at /llms.txt for AI search discoverability
• OpenSearch support for browser search integration
• PWA-ready with full manifest and service worker
• Responsive design optimized for mobile, tablet, and desktop
• Google Analytics, Clarity, and AdSense integrated

SopKit uses a data-driven architecture with tools.json as the single source of truth:

graph TD
    A[tools.json] -->|Metadata| B[SEO Engine]
    A -->|Config| C[ToolLayout]
    B -->|Generates| D[Dynamic Routes]
    C -->|Renders| E[Tool Pages]
    D -->|Redirects| E

• Framework: Next.js 16 (App Router)
• Runtime: Bun
• Styling: Tailwind CSS v4 + Glassmorphism Design System
• UI Components: Radix UI, Lucide Icons, Framer Motion
• SEO: Dynamic metadata API, JSON-LD structured data, XML sitemap, robots.txt
• Analytics: Google Analytics (G-HKX99R92SE), Microsoft Clarity, OneDollarStats
• Monetization: Google AdSense (ca-pub-1828915420581549)
• Deployment: Cloudflare Pages via OpenNext

• Bun (recommended) or Node.js 20+
• Git

# Clone the repository
git clone https://github.com/SopKit/sopkit.github.io.git
cd SopKit

# Install dependencies
bun install

# Set up environment variables
cp .env.example .env.local

# Start development server
bun dev

Open http://localhost:3000 to see the platform.

bun run build
bun run export

bun run deploy

See .env.example for all available environment variables. Stack Auth is optional — the app functions without it.

We welcome contributions! Whether you're fixing bugs, adding new tools, or improving documentation:

• Found a bug? Open an issue
• Want a new tool? Check our contributing guide
• See our vision in OPEN_SOURCE.md

• Architecture & Workflow
• Design System
• Low-Hanging-Fruit SEO Strategy
• SEO & Monetization Plan
• Keyword Map

• IndexFast — Lean SEO indexing SaaS
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• Sopplayer — Customizable HTML5 video player

This project is open source. See the LICENSE file for details.