Qopy Features - Enterprise-Grade Secure Text & File Sharing Redefined

Qopy is not just another sharing service. It's a privacy-first, security-focused platform with enterprise-grade encryption that puts your data protection above everything else. Our unified system handles both text and file sharing with the same level of security and privacy protection.

Unified Text & File Sharing

Share both text content and files through a single, secure platform. All content is encrypted client-side before transmission, ensuring maximum privacy regardless of content type.

Enterprise-Grade Client-Side Encryption

Your content is encrypted with AES-256-GCM encryption directly in your browser before it ever reaches our servers. We literally cannot read your content, even if we wanted to.

Multi-Part File Upload System

Large files are uploaded in secure chunks with automatic reassembly. Files up to 100MB are supported with progress tracking and resume capability.

Automatic Expiration

Set expiration times from 5 minutes to 24 hours. Your content automatically disappears after the specified time, ensuring nothing is stored permanently.

Access Code Protection

Add an optional access code to your shared content. Your plaintext access code is hashed with 600,000 PBKDF2 iterations in your browser — only the irreversible hash is sent to the server.

One-Time Access

Enable self-destruct mode so your content disappears immediately after the first person views it. Perfect for sensitive information.

QR Code Sharing

Generate QR codes for easy mobile sharing. Simply scan the code with any smartphone to access your shared content instantly. QR codes are generated client-side for maximum privacy.

No Registration Required

Start sharing immediately without creating accounts or providing personal information. Complete anonymity from the start.

Quick Share Mode

Ultra-fast sharing with 6-character codes, 5-minute expiration, and zero-knowledge encryption via URL secrets. Same AES-256-GCM encryption as Enhanced Security mode, but with shorter codes — designed for quick, instant sharing with peers.

Enhanced Security Mode

10-character codes with URL secrets for sensitive content. Provides additional security layers for confidential information.

REST API Access

Integrate Qopy into your applications with our comprehensive REST API. Note: Client-side encryption is only available through the web interface.

Redis Caching (Optional)

Enhanced performance with optional Redis caching for upload sessions. Falls back gracefully to database storage when Redis is unavailable.

Advanced Security Features

Enterprise-Grade Encryption Features

Qopy implements cutting-edge encryption techniques for maximum security:

AES-256-GCM encryption - Advanced algorithm used by financial institutions worldwide
PBKDF2 key derivation - 600,000 iterations (OWASP 2025 compliant) with per-clip random 256-bit salts
Hybrid security system - URL secrets + access codes for defense in depth
Random IV generation - Cryptographically random 96-bit IV per encryption operation
Binary storage - Direct byte concatenation, stored as BYTEA for efficiency
Random key generation - Cryptographically secure random keys for non-protected clips
Authenticated encryption - GCM mode provides both confidentiality and integrity
Zero-knowledge architecture - We literally cannot read your content

Hybrid Security Architecture

Qopy's innovative hybrid security combines multiple protection layers:

URL secrets - High-entropy (256-bit) random secrets automatically generated and included in share URLs
User access codes - Traditional access code protection chosen by users
Combined secrets - Both secrets combined for maximum security (URL_secret:access_code)
Defense in depth - Even weak access codes are protected by the URL secret
URL-based access control - Only those with the complete URL can attempt decryption
Two-factor security - Something you know (access code) + something you have (URL)

Zero-Knowledge Architecture

True privacy protection with zero-knowledge guarantees:

We never see your plain text content
All encryption happens in your browser
Only encrypted data is stored on our servers
Plaintext access codes never leave your browser — only a PBKDF2-SHA-512 hash is transmitted
URL secrets never leave your browser
Even if our servers were compromised, your data would remain secure
Random IV per operation - no IV reuse risk, cryptographically generated

File Upload Security

Advanced file handling with enterprise-grade security:

Chunked uploads - Large files split into secure 5MB chunks
Automatic reassembly - Files reassembled server-side with integrity checks
Progress tracking - Real-time upload progress with resume capability
File validation - Comprehensive file type and size validation
Secure storage - Files stored with same encryption as text content
Automatic cleanup - Expired files and orphaned chunks removed automatically

Rate Limiting & Abuse Prevention

Our multi-layered rate limiting system prevents abuse while ensuring fair usage:

Burst protection against rapid-fire attacks
General API protection for overall stability
Content-specific limits to prevent spam
IP-based enforcement with temporary processing
Upload-specific rate limiting for file sharing

API Security Limitations

Important: Client-side encryption is only available through the web interface. When using the API directly:

Content is sent as plaintext to the server
Server-side encryption is applied
For maximum security, always use the web interface

How Qopy Compares to Alternatives

Qopy vs Pastebin

Feature	Qopy	Pastebin
Privacy & Security	✅ Enterprise-grade client-side encryption, zero-knowledge, hybrid security	❌ No encryption, permanent storage, IP tracking
File Sharing	✅ Secure file uploads up to 100MB with chunked transfer	❌ Text only, no file support
User Experience	✅ No registration, instant sharing	⚠️ Account required for features
Mobile Experience	✅ QR codes, responsive design	❌ Poor mobile interface
Content Expiration	✅ Guaranteed auto-deletion	⚠️ Manual deletion, may persist
Ads & Monetization	✅ Completely ad-free	❌ Intrusive advertisements
Modern Features	✅ Enterprise-grade encryption, Quick Share mode, hybrid security, QR codes	⚠️ No encryption, limited security options
Interface Design	✅ Modern, Spotify-inspired UI	❌ Outdated, cluttered design

Why choose Qopy?

Unified platform - Share both text and files securely
Enterprise-grade encryption - Client-side AES-256-GCM encryption for ultimate privacy
Zero-knowledge architecture - We literally cannot read your content
Quick Share mode - 6-character codes with zero-knowledge encryption for instant peer sharing
Enhanced security - 10-character codes with URL secrets for sensitive content
Mobile-optimized - QR codes and responsive design for easy sharing
Zero distractions - No ads, no tracking, no bloat
Lightning fast - Instant sharing with auto-retrieval and keyboard shortcuts

Ready to Experience Secure Sharing?

Join thousands of users who trust Qopy for their secure text and file sharing needs.

Start Sharing Securely