Codificador / Decodificador Base64
Codifica texto a Base64 o decodifica Base64 a texto rapidamente.
Continuar con
Mant?n el flujo de trabajo en movimiento con la siguiente acci?n relacionada.
Privacy & Trust
Transmitir datos binarios en URLs o correos electronicos
Base64 is useful when plain-text channels need to carry binary-compatible payloads.
Codificacion de autenticacion basica HTTP
Decoded output is rendered locally in the browser without leaving the page.
Advertencia: Base64 es un metodo de codificacion, no de cifrado. No lo uses para proteger datos sensibles.
Encoding is reversible and should never be mistaken for real cryptographic protection.
Resultado
Run encode or decode to produce an output.
Siguientes pasos sugeridos
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Escapar y desescapar cadenas para HTML, JSON, JavaScript, SQL y más
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Convertir números entre binario, octal, decimal y hexadecimal
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Convertir entre marcas de tiempo Unix y fechas legibles
Búsqueda ASCII / Unicode
Buscar y consultar códigos de caracteres ASCII y Unicode
Cómo Usar
Pega o Escribe
Ingresa tu texto, código o datos en el área de entrada.
Elige las Opciones
Selecciona la transformación o formato que deseas aplicar.
Copia el Resultado
Copia la salida a tu portapapeles con un solo clic.
Por Qué Usar Esta Herramienta
100% Gratis
Sin costos ocultos, sin niveles premium — todas las funciones son gratuitas.
Sin Instalación
Se ejecuta completamente en tu navegador. No necesitas descargar ni instalar nada.
Privado y Seguro
Tus datos nunca salen de tu dispositivo. Nada se sube a ningún servidor.
Funciona en Móvil
Totalmente responsivo — úsalo en tu teléfono, tableta o escritorio.
Base64 Encoding and Decoding Explained
Key Takeaways
- Base64 converts binary data into ASCII text, making it safe to transmit through text-only channels like email and JSON.
- Base64 is an encoding scheme, not encryption — it provides no security and can be decoded by anyone.
- All encoding and decoding happens in your browser — your data stays on your device.
Base64 encoding is one of the most fundamental data transformation techniques in web development. It represents binary data using 64 ASCII characters (A-Z, a-z, 0-9, +, /), enabling safe transmission of files, images, and binary content through text-based protocols. Understanding Base64 is essential for working with APIs, email systems, and data URIs.
Base64 encoding increases data size by approximately 33% compared to the original binary.
Size Overhead
Key Concepts
How Base64 Works
Base64 takes every 3 bytes (24 bits) of input and splits them into four 6-bit groups, mapping each to one of 64 printable ASCII characters. Padding with '=' is added when input length is not a multiple of 3.
Data URI Embedding
Base64-encoded images can be embedded directly in HTML and CSS using data URIs (data:image/png;base64,...), eliminating extra HTTP requests for small assets.
Email Attachments (MIME)
Email protocols like SMTP are text-based. Base64 encoding via MIME allows binary attachments like images and documents to travel safely through email systems.
Base64url Variant
The URL-safe variant replaces '+' with '-' and '/' with '_' to avoid conflicts in URLs and filenames. This variant is used extensively in JWTs and OAuth tokens.
Pro Tips
Never use Base64 for security — it is trivially reversible. Use proper encryption (AES, RSA) for sensitive data.
Avoid Base64-encoding large images inline; the 33% size increase negates the benefit of saving an HTTP request.
Use Base64url (RFC 4648 §5) instead of standard Base64 when the output will appear in URLs or filenames.
Most modern browsers support btoa() and atob() natively, but they only handle Latin-1 characters — use TextEncoder for Unicode.
All Base64 encoding and decoding is performed entirely in your browser. Your data is never transmitted to any external server, making this tool safe for sensitive content.