Useful tools for SaaS developers. No signup required, completely free.
Calculate Stripe processing fees, net payout, and effective fee percentage for any payment method and currency.
🛡️Generate Row Level Security policies with templates for common patterns. Copy-paste SQL ready for your Supabase project.
💰Enter your costs and target margin to get break-even pricing, suggested tiers, and revenue projections.
🖼️Preview how your meta tags look on Google, Twitter/X, LinkedIn, Facebook, Discord, and Slack before publishing.
🔒30 essential security checks across auth, database, API, frontend, and infrastructure. Get a score and track progress.
☁️Compare monthly costs of different hosting, database, auth, email, and payment providers at various user scales.
🔐Configure HSTS, CSP, X-Frame-Options, Permissions-Policy and more. Get copy-paste ready next.config.ts code.
🔑Decode and inspect JSON Web Tokens. View header, payload, claims, algorithm, and expiry status instantly in your browser.
✍️Build and sign JSON Web Tokens with HS256, HS384, or HS512. Set claims, pick an algorithm, and get a signed token in your browser.
🌐Configure CORS for Next.js middleware, route handlers, or Express. Get copy-paste code with production-safe defaults.
🧪Paste JSON and get a typed Zod schema with automatic format detection and TypeScript type inference. No signup.
🪝Verify Stripe-Signature headers against your webhook secret. Computes HMAC-SHA256 in your browser and decodes the event payload.
🗝️Generate cryptographically secure API keys, webhook secrets, and tokens. Hex, Base64, or alphanumeric with optional prefix. Runs in your browser.