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All toolkits
Developer Tools

Build with confidence

Cryptographic utilities and dev helpers — generated locally in your browser, never sent to a server.

6 tools · processed in your browser

JSON Formatter

Format, minify, and validate JSON with clear error messages.

Base64 Encode / Decode

Convert text or files to Base64 and back — UTF-8 safe.

URL Encode / Decode

Encode or decode URL components with encodeURIComponent.

Hash Generator

Compute SHA-256, SHA-384, or SHA-512 hashes for text and files.

JWT Secret Generator

Generate cryptographically secure JWT secret keys with adjustable bit strength.

JWT Decoder

Inspect JWT headers and payloads locally — no upload, no verification server.