Free, professional-grade cryptography and developer tools that run entirely in your browser.
devcipher.dev · About · Report a Bug
DevCipher is a collection of 100+ cryptography, encoding, hashing, and developer utilities — all running locally in your browser. No accounts. No uploads. No tracking. Nothing leaves your device.
Built by Animesh Shaw — Senior AVP at EXL with 10+ years in information security, DevSecOps, and Post-Quantum Cryptography research.
| Category | Tools |
|---|---|
| Hash | CRC, MD2/4/5, SHA-1/2/3, SHA-512 variants, Keccak, SHAKE, cSHAKE, KMAC, RIPEMD, BLAKE2/3 — all with file hash variants |
| Cryptography | AES, DES, Triple DES, RC4, ECDSA (keygen/sign/verify), RSA (keygen/sign/verify/encrypt/decrypt) |
| Encoding | Hex, Base32, Base58, Base64, HTML entities, URL encoding — all with file variants |
| Format | JSON validator/formatter/minifier/viewer, XML validator/formatter/minifier |
| Convert | Case converter, number base converter, color converter (HEX/RGB/HSL/HSV/OKLCH), Unix timestamp, IP/CIDR tools |
| Other | QR code generator, syntax highlighter (36 langs), text diff, regex tester, Lorem Ipsum generator, Cron parser |
| Developer | JWT decoder/verifier, UUID generator (v1/v3/v4/v5), password strength analyser, password hasher (bcrypt/scrypt/PBKDF2), hash identifier, X.509 certificate inspector |
Every computation runs as JavaScript inside your browser. Input you enter never leaves your device — not to our servers, not to anyone's servers. The site is a static export with no backend.
You can verify this yourself by inspecting the network tab in your browser's dev tools — you'll see zero outbound requests when using tools.
DevCipher has a defence-in-depth CI/CD security pipeline:
Security findings (Semgrep + CodeQL) are uploaded as SARIF to the GitHub Security → Code scanning alerts tab.
- Framework: Next.js 16 (App Router) + React 19 + TypeScript 6
- Styling: Tailwind CSS v4 + Radix UI + shadcn/ui
- Crypto libraries:
@noble/hashes,@noble/ciphers,@noble/curves,crypto-js,bcryptjs,scrypt-js,node-forge - Output: Static export (
next build→out/) deployed to GitHub Pages - Domain: devcipher.dev (CNAME)
# Install dependencies
npm install
# Start dev server (Turbopack)
npm run dev
# Type-check
npx tsc --noEmit
# Build static export
npm run build
# Output is in out/- Add an entry to
lib/tools-config.tsunder the appropriateCATEGORIESarray - Create
components/tools/MyTool.tsx - Wire it in
components/tools/ToolRenderer.tsx - The sitemap updates automatically
- Post-Quantum Cryptography tooling — CRYSTALS-Kyber, CRYSTALS-Dilithium, SPHINCS+ so practitioners can experiment with lattice-based and hash-based schemes alongside classical algorithms
DevCipher is free and will always be free.
- Email: animeshshaw@pm.me
- GitHub Issues: Bug reports & feature requests
- LinkedIn: linkedin.com/in/animeshshaw
Source code is open source. See LICENSE for details.
Built with an offensive security mindset. Shift-left security belongs in every developer's hands.