Paste a JSON Web Token to instantly decode the header, payload, and claims. Check expiry status, algorithm, and issuer, all in your browser.
Decoding happens entirely in your browser — tokens are never sent to a server.
Supabase Auth in Next.js App Router
How JWTs flow through cookies, getUser vs getClaims, and the server-side validation that prevents session spoofing.
Supabase JWT + Session Management in Next.js
The JWT lifecycle: ES256 signing keys, getClaims vs getUser, AAL claims for MFA gating, and the five JWT mistakes that ship security holes.
Stripe Fee Calculator
Calculate Stripe fees for any payment method and currency.
RLS Policy Generator
Generate Supabase Row Level Security policies with templates.
SaaS Pricing Calculator
Find your break-even price and suggested pricing tiers.
OG Image Preview
Preview meta tags on Google, Twitter, LinkedIn, and more.
Security Checklist
30 essential security checks with scoring and progress tracking.
Tech Stack Costs
Compare hosting, database, and service costs at scale.
Security Headers
Generate Next.js security headers config with copy-paste code.
JWT Generator
Build and sign JWTs with HS256, HS384, or HS512 in your browser.
CORS Config Generator
Generate CORS configuration for Next.js or Express with copy-paste code.
JSON to Zod Converter
Paste JSON and get a typed Zod schema with format detection.
Stripe Webhook Verifier
Verify Stripe-Signature headers with your webhook secret in your browser.
API Key Generator
Generate cryptographically secure API keys, webhook secrets, and tokens in your browser.
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