Content Security Policy (CSP) Builder
100% In-Browser Privacy
Trending
Construct and validate HTTP CSP headers and meta tags.
Content Security Policy Level 3 Studio
Presets:
Security Advisor (2 notices):
- 'unsafe-inline' in script-src disables protection against Cross-Site Scripting (XSS).
- 'unsafe-eval' allows arbitrary eval() code execution.
Source Fetch & Execution Directives
default-src
script-src
style-src
img-src
font-src
connect-src
frame-ancestors (Clickjacking)
object-src (Plugin sandbox)
Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-eval' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob: https:; font-src 'self' data: https://fonts.gstatic.com; connect-src 'self' https:; frame-ancestors 'none'; object-src 'none'; base-uri 'self'; form-action 'self'; upgrade-insecure-requests; block-all-mixed-content;
AdvertisementOmnikite Zero Data Storage
Adsterra Ad Placement Slot (728x90)Configure keys in
config/ads.ts to display live campaigns.Non-Intrusive Banner
100% Zero-Upload Privacy
All computation executes exclusively inside your device memory using Web APIs and WebAssembly. No data or files ever leave your browser.
Real-Time Native Execution
Zero network roundtrips. Operates offline without sending external API requests, delivering instantaneous sub-millisecond computation.
Developer-First Architecture
Engineered with RFC standards, cryptographic primitives (Web Crypto Subtle API), and production-grade formatting libraries.
Related Security & Network Utilities
Shamir's Secret Sharing (SSS) Splitter & ReconstructorSplit master passwords into M-of-N threshold shares with GF(256) math.BIP-39 Mnemonic Seed Phrase GeneratorGenerate cryptographically secure 12, 18, or 24-word seed phrases.IPv4 Subnet & CIDR CalculatorCalculate network address, broadcast, usable host IP range, and masks.PBKDF2 Cryptographic Key Derivation StudioDerive secure keys with customizable iterations, salts, and SHA hashes.