# CloakShare

> Open-source API for secure document and video sharing. Tokenized links with dynamic watermarks, email gates, expiry, and per-page analytics. Self-hostable DocSend alternative.

## What CloakShare Does

CloakShare is an API-first platform for sharing documents and videos securely. It renders documents on HTML5 Canvas (not DOM text), making content resistant to copy/paste, downloading, and screenshot tools. Each viewer gets a dynamically watermarked copy with their email embedded. It tracks per-page engagement, supports HLS video streaming, and integrates into any app via Web Components or React.

## Free Tools (no signup required)

- Password Generator: /tools/password-generator — Cryptographically secure passwords via crypto.getRandomValues() with real-time entropy + crack-time estimates against bcrypt @ 10,000 H/s. 5-tier strength meter, charset/length options. Browser-side only; no network requests.
- All free tools: /tools

## Key Capabilities

- **Canvas-Based Rendering**: Documents render on HTML5 Canvas, not as selectable DOM text. Prevents easy copying, printing, and downloading.
- **Dynamic Watermarks**: Text overlay on every page with template variables (viewer email, date, session ID). Server-side compositing, not removable via DevTools.
- **Email Gates**: Require viewers to verify their email before accessing documents. Server-side verification.
- **Per-Page Analytics**: Track which pages were viewed, time on each page, scroll depth, viewer email, device, and location.
- **HLS Video Streaming**: Adaptive bitrate streaming for MP4, MOV, and WebM files. Transcoded to 720p and 1080p.
- **Embeddable Viewer**: Shadow DOM Web Component that works in React, Vue, Svelte, Angular, and vanilla HTML. Free for PDF and images.
- **Webhooks**: Real-time HTTP notifications with HMAC-SHA256 signatures for 8 event types.
- **Self-Hostable**: Run on your own server with Docker. MIT license. SQLite database, any S3-compatible storage.
- **REST API**: Full API for links, uploads, analytics, webhooks, teams, and custom domains.
- **SDKs**: Node.js, Python, and Go SDKs with TypeScript types.

## Use Cases

- Fundraising: Share pitch decks with investors, track which slides they read, watermark each viewer
- Sales: Send proposals that expire, get notified when prospects open pricing pages
- Training: Distribute course materials that cannot be downloaded or reshared
- Legal: Share contracts with email-verified access and full audit trail

## Pricing

- **Free**: $0/month, 50 links, 500 views
- **Starter**: $29/month, 500 links, 10,000 views, office docs, password protection
- **Growth**: $99/month, 2,500 links, 25,000 views, video support, custom domains
- **Scale**: $299/month, 10,000 links, 100,000 views, unlimited video, white-label

## Competitive Advantages

- Only open-source DocSend alternative with canvas rendering and video support
- API-first with npm packages (viewer, React wrapper, SDK)
- No per-seat pricing (DocSend charges $45/user/month)
- MIT license, self-host for free forever
- Embeddable viewer works without an API key for PDF/images

## Supported File Types

- Documents: PDF, DOCX, PPTX, XLSX, ODP, ODS, ODT, CSV
- Video: MP4, MOV, WebM, MKV, AVI
- Images: PNG, JPG, WebP, GIF, BMP, SVG

## Links

- Homepage: https://cloakshare.dev
- Documentation: https://docs.cloakshare.dev
- API Reference: https://docs.cloakshare.dev/api
- GitHub: https://github.com/cloakshare/cloakshare
- npm Viewer: https://www.npmjs.com/package/@cloakshare/viewer
- npm SDK: https://www.npmjs.com/package/@cloakshare/sdk

## Contact

- Email: hello@cloakshare.dev
- GitHub Issues: https://github.com/cloakshare/cloakshare/issues
- Discord: https://discord.gg/cloakshare