Fast Online Developer Utilities
Essential, privacy-friendly online developer tools. Everything executes locally in your browser.
Calculadora Interés Compuesto
Simula el crecimiento de tu dinero con aportaciones periódicas, gráficos interactivos e inflación.
JSON Formatter & Validator
Format, beautify, validate, and minify JSON with customizable indentation.
Base64 Encode / Decode
Convert text to Base64 or decode Base64 strings with full UTF-8 Unicode support.
Regex Tester & Debugger
Test, validate, and debug regular expressions with real-time match highlights and capture groups.
Unix Timestamp Converter
Convert Unix epoch timestamps to UTC, ISO-8601, and local human-readable dates.
UUID / GUID Generator
Generate bulk cryptographically random Version-4 UUIDs with custom casing and braces.
Hash Generator (SHA / MD5)
Calculate SHA-256, SHA-512, MD5, and SHA-1 hashes instantly with Web Crypto.
JWT Decoder & Inspector
Decode and inspect JSON Web Tokens, payload claims, and expiration dates securely.
Markdown Live Previewer
Write, preview, and format Markdown in real-time with instant HTML export.
CSS Formatter & Minifier
Beautify messy stylesheets or minify CSS code to maximize web performance.
HTML Entity Encoder / Decoder
Encode reserved HTML characters to safe entities or decode entities back to text.
URL Encode / Decode
Encode or decode URLs, percent-encoded strings, and query parameters.
Lorem Ipsum Generator
Generate customizable dummy placeholder text by paragraphs, sentences, or words.