Free Developer & Security Tools
Fast, private, browser-based utilities for developers and security engineers. Everything runs locally — 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.
All 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.
URL Encoder / Decoder
Encode and decode URL components safely for query strings and paths.
Regex Tester
Test regular expressions against sample text with live match highlighting.
SQL Formatter
Format and beautify SQL queries for readability.
Diff Checker
Compare two texts and see line-by-line differences highlighted.
Markdown Previewer
Live markdown preview with real-time rendering as you type.
Bcrypt Hash Generator
Generate bcrypt password hashes with adjustable cost factor. Free, private, runs in your browser.
Strong Password Generator
Generate cryptographically secure passwords. Customize length, character sets, and complexity.
YAML Formatter & Validator
Format, validate, and lint YAML files. Detect syntax errors and convert to JSON.
XML Formatter & Beautifier
Format, validate, and minify XML. Free, private, runs in your browser.
HTML Entity Encoder / Decoder
Encode and decode HTML entities. Convert special characters to safe HTML entities.
Color Picker & Converter
Convert colors between HEX, RGB, HSL, and HSV. Includes color preview and palette generator.
Image to Base64 Encoder
Convert images to Base64 data URIs. Free, private, runs in your browser.
Markdown to HTML Converter
Convert markdown to clean HTML. Live preview, copy output with one click.
HTML to Markdown Converter
Convert HTML to clean markdown. Strips tags, preserves structure, handles links and images.
URL Parser & Analyzer
Break down any URL into protocol, hostname, path, query params, and fragment.