CoolPDF

Free PDF tools that respect your privacy. CoolPDF is a privacy-first, 100% client-side PDF toolkit for the web — think ilovepdf.com, except your files never leave your device. All PDF processing runs in the browser (WebAssembly / Web Workers); there is no backend at all.

Live site: https://getcoolpdf.com

The three pillars

• No Uploads — your files never leave your device. Every tool runs locally in your browser.
• No Sign-Up — no account, no email address, no personal information. Ever.
• Free Forever — every tool is free with no usage limits, funded by unobtrusive ads.

Don't take our word for it: disconnect from the internet after a page loads and the tools still work; watch the Network tab in DevTools and see zero file uploads; audit the source code — it's open source (AGPL-3.0).

Tools

All tools run 100% locally in your browser — no uploads, no sign-up, free forever:

• Merge PDF — combine multiple PDFs into a single file, in the order you want
• Split PDF — extract a page range or split one PDF into separate documents
• Compress PDF — shrink the file size while keeping the quality you need
• Rotate PDF — rotate single pages or an entire document in seconds
• Organize PDF — reorder, delete, and rearrange pages with drag and drop
• PDF to JPG — turn each PDF page into a high-quality JPG image
• JPG to PDF — convert JPG images into a clean, shareable PDF document
• Protect PDF — add AES-256 password encryption to keep your PDF private
• Unlock PDF — remove password protection from PDFs you own
• Watermark PDF — stamp a text or image watermark over every page, tiled or centered
• Page Numbers — add page numbers to your PDF, exactly where you want them
• PDF to Markdown — extract clean, structured Markdown from any PDF
• Word to Markdown — convert .docx documents into clean, AI-ready Markdown
• Excel to Markdown — turn spreadsheet sheets into Markdown tables
• Remove Pages — delete unwanted pages from a PDF with a visual page picker
• Extract Pages — save selected pages of a PDF as a new document
• Reorder Pages — drag pages into exactly the order you want
• Extract Images — pull every embedded image out of a PDF as JPG/PNG files
• HEIC to PDF — turn iPhone HEIC photos into a clean, shareable PDF document
• Sign PDF — draw a signature or upload a photo of it, and place it anywhere on a PDF document

Tech stack

• Next.js 15 (App Router, output: 'export' static export to out/) + React 19 + TypeScript (strict)
• Tailwind CSS 3.4 — no UI framework, system font stack
• lucide-react icons
• Hand-rolled lightweight i18n (no next-intl): 8 locales — en (default, at the root), de, fr, it, es, pt, zh, ja (path-prefixed)
• Zero backend: no API routes, no server code, nothing to deploy but static files

Local development

npm install        # install dependencies
npm run dev        # dev server on http://localhost:3000
npm run build      # static export to out/
npm run lint       # ESLint (next/core-web-vitals)
npm run type-check # tsc --noEmit

Deployment (Cloudflare Pages)

• Build command: npm run build
• Build output directory: out
• No environment variables are required. Optional ones (see .env.example):
  • NEXT_PUBLIC_SITE_URL — canonical URL used for metadata/hreflang/sitemap (default https://getcoolpdf.com)
  • NEXT_PUBLIC_GITHUB_URL — GitHub link target (default https://github.com/Jimsnote/coolpdf)
  • NEXT_PUBLIC_CF_ANALYTICS_TOKEN — enables the cookieless Cloudflare Web Analytics beacon
  • NEXT_PUBLIC_ADSENSE_CLIENT — enables the AdSense ad component

Project structure

src/
├── app/                    # routes: English pages at the root, other locales under [locale]/
│   ├── page.tsx            # Home (en) — thin wrapper around components/pages/*
│   ├── about|privacy|terms|faq/page.tsx
│   ├── [locale]/           # mirrored routes for de/fr/it/es/pt/zh/ja (generateStaticParams)
│   ├── sitemap.ts          # all pages × 8 locales with hreflang alternates
│   └── robots.ts           # allow all + explicit AI-crawler rules
├── components/
│   ├── layout/             # Header (with language switcher), Footer, SiteShell
│   ├── pages/              # HomePage, AboutPage, PrivacyPage, TermsPage, FaqPage (shared by all locales)
│   ├── seo/                # JsonLd, FactSummary (canonical GEO summary)
│   └── ads/                # AdBanner (AdSense placeholder, off unless configured)
├── i18n/
│   ├── config.ts           # locales, defaultLocale, isLocale()
│   ├── get-dictionary.ts
│   └── locales/            # en.ts defines the Dictionary type; the other 7 mirror it
└── lib/
    ├── site.ts             # SITE_URL, GITHUB_URL, tokens (env-overridable)
    ├── seo.ts              # buildAlternates() (canonical + hreflang), pageMetadata()
    └── tools.ts            # tool registry (12 tools, status flags)
public/
├── llms.txt                # site summary for LLM crawlers
└── logo.svg

Contributing

Issues and pull requests are welcome on GitHub: https://github.com/Jimsnote/coolpdf

License

CoolPDF is free software licensed under the GNU Affero General Public License v3.0 (AGPL-3.0). See LICENSE.