Free Developer & Security Tools
Fast, private, browser-based utilities for developers and security engineers. Everything runs locally in your browser — no data is ever sent to a server.
Why DevSecSuite?
Most online tools send your data to a server. Ours don't. Every tool on this site runs entirely in your browser using client-side JavaScript. Your JWTs, hashes, and certificates never leave your machine.
Built for developers who need a quick answer without a signup, an install, or a privacy trade-off.
Available Tools
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds.
UUID Generator
Generate RFC 4122 UUIDs (v4) instantly. Bulk generation supported.
Base64 Encoder / Decoder
Encode and decode Base64 strings. Handles UTF-8 and binary data.
JWT Decoder popular
Decode JSON Web Tokens and inspect header, payload, and signature. Never sends data anywhere.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.
Cron Expression Parser
Parse cron schedules and see the next execution times in plain English.
JSON Formatter
Format, validate, and minify JSON. Color-coded syntax highlighting.
Regex Tester
Test regular expressions against sample text with live match highlighting.
URL Encoder / Decoder
Encode and decode URL components safely for query strings and paths.
Coming Soon
SSL Certificate Checker
Inspect any domain's SSL certificate, expiry date, and chain.
DNS Lookup
Query A, AAAA, MX, TXT, and CNAME records for any domain.
SQL Formatter
Format and beautify SQL queries for readability.