PrivateSecurity is a professional-grade, browser-native cryptography and privacy toolkit — and a core pillar of the Kopivo Suite. It operates under a strict Zero-Knowledge architecture, executing every cryptographic operation directly in the user's browser via the Web Crypto API and WebAssembly.
The world's first serverless, privacy-first security suite. No uploads, no servers, 100% local.
- The Problem with Cloud Security Tools
- How KopivoSecurity Works
- Available Local Tools
- Tech Stack
- Privacy & Security Protocol
- The Kopivo Ecosystem
Online security tools that operate server-side create a fundamental paradox: you are trusting a third party with the very secrets you are trying to protect.
- Key Exposure: Sending a password, encryption key, or secret phrase to any server — even over HTTPS — creates an interception surface that should never exist.
- Metadata Leakage: File-based cloud tools read your document's metadata, filenames, and content patterns before you ever see the output.
- False Anonymity: "No-log" policies are unverifiable claims. Any server that processes your data can retain it.
- Behavioral Profiling: Repeated use of cloud crypto tools creates a behavioral fingerprint — who encrypts what, when, and how often.
KopivoSecurity eliminates the server, eliminating every one of these risks.
KopivoSecurity runs every cryptographic and privacy operation natively inside the browser using the Web Crypto API, SubtleCrypto, and targeted WebAssembly modules — with zero server involvement.
- Web Crypto API Engine: The browser's built-in, hardware-accelerated cryptographic primitives (AES-GCM, SHA-256, PBKDF2, and more).
- Edge Execution: Your CPU and browser sandbox handle all key generation, hashing, and file transformation.
- Data Sovereignty: Your keys, messages, and files never leave your device's RAM. Only static assets (HTML/JS/WASM) are served by our CDN.
- Zero-Footprint: When the tab closes, all cryptographic material is automatically wiped from volatile memory.
- Svelte 5 + Runes: The UI is built with Svelte 5's reactivity system (Runes), delivering a fast, lightweight, zero-overhead interface.
| Tool | Description |
|---|---|
| Encrypt Message | Encrypt and decrypt text messages using AES-256-GCM. No key ever leaves the browser. |
| Generate Key | Generate cryptographically secure random keys of any length and encoding (Base64, Hex). |
| Generate Key | Build strong, human-readable passphrases using entropy-based wordlist generation. |
| 2FA Generator | Generate TOTP-compatible 2FA secrets and QR codes for use with any authenticator app. |
| Base64 Converter | Encode and decode text, files, or binary data to and from Base64 format. |
| Tool | Description |
|---|---|
| Encrypt File | Encrypt any file with a passphrase using AES-256. The output is a portable, encrypted blob. |
| Clear Image | Strip all EXIF metadata — GPS, device info, timestamps — from image files before sharing. |
| Hide in Image | Embed hidden text or data inside image files using LSB steganography. |
| Destroy File | Overwrite file contents with random data before deletion to prevent forensic recovery. |
| Tool | Description |
|---|---|
| See Metadata | Inspect the full metadata payload of any file — EXIF, ID3, document properties, and more. |
| Audit Key | Analyze password and key strength: entropy, character distribution, and crack-time estimate. |
| Generate Hash | Compute cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) for any file or text string. |
| Validate Hash | Verify file integrity by comparing its computed hash against a known reference value. |
| Clear Link | Strip tracking parameters (UTM, fbclid, gclid, etc.) from any URL before sharing. |
| Tool | Description |
|---|---|
| Fake Profile | Generate complete synthetic identities (name, address, DOC, email) for testing and privacy. |
| Browser Footprint | Reveal your full browser fingerprint — entropy, uniqueness score, and exposed signals. |
| IP/VPN Leak | Detect real IP leaks via WebRTC, DNS, and IPv6 — even through active VPN connections. |
| Adblock Test | Audit which tracking scripts, ad networks, and telemetry beacons your browser is blocking. |
| Layer | Technology |
|---|---|
| UI Framework | Svelte 5 (Runes reactivity system) |
| Crypto Engine | Web Crypto API (SubtleCrypto — AES-GCM, SHA-2, PBKDF2, ECDH) |
| Runtime | WebAssembly (WASM) for steganography and file-level operations |
| Entropy Source | crypto.getRandomValues() — CSPRNG native to every modern browser |
| File I/O | Browser File API + Blob URL download |
| Styling | Scoped Svelte styles + CSS custom properties |
| Distribution | Static CDN — zero backend, zero database |
KopivoSecurity operates on a No-Log, No-Cloud mandate across all 18 tools:
- Local Intake: Files, keys, and messages are accessed exclusively via the browser's native File API and DOM. No data is ever transmitted.
- In-Memory Processing: All cryptographic operations execute inside a secure, sandboxed Web Worker using SubtleCrypto. The main thread only receives the final output blob.
- Instant Output: The browser triggers a local Blob URL download. No data is ever sent to a backend.
- No Key Escrow: KopivoSecurity never stores, logs, or has access to any key, passphrase, or secret generated or used within the suite.
- Metadata Awareness: Unlike cloud tools, KopivoSecurity actively surfaces and strips metadata — it never reads it for profiling.
KopivoSecurity is one pillar of the broader Kopivo privacy-first productivity suite:
| Product | Focus | URL |
|---|---|---|
| Kopivo PDF | PDF management & editing | pdf.kopivo.com |
| Kopivo Media | Video & audio processing | media.kopivo.com |
| Kopivo Security | Cryptography & privacy tools | security.kopivo.com |
| Kopivo Devs | Developer toolkit | devs.kopivo.com |
KopivoSecurity is built to make the web private again — one secret at a time.
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- Feedback: Reach out via security.kopivo.com for feature requests or technical inquiries.
Precision. Privacy. Performance. © 2026 Kopivo.