Base64 Converter
Text, files and images
Base64 es un esquema de codificación que convierte datos binarios en texto ASCII usando 64 caracteres imprimibles (A-Z, a-z, 0-9, +, /). Se usa comúnmente para:
- Incrustar imágenes en HTML/CSS (Data URIs)
- Enviar archivos binarios en JSON o emails
- Codificar tokens de autenticación (como JWT)
- Transmitir datos en URLs de forma segura
Base64 Converter: Encode and Decode Text and Files
Base64 is an encoding that converts binary data into printable ASCII characters. It's used to transmit binary through text protocols like email (MIME), JSON, HTTP headers, and data URIs.
Our converter supports both text and files (images, PDFs, etc.). Everything is processed locally in your browser — no data is uploaded to servers. Ideal for embedding images in HTML/CSS or storing files in JSON.
Base64 encoding is NOT encryption. Anyone can decode it. Use it only when you need format compatibility, not for confidentiality.
How does it work?
- 1Select mode
Choose 'encode' to convert text/file to Base64 or 'decode' to reverse the process.
- 2Enter input
Paste the text or upload the file you want to convert.
- 3Copy or download
Get the result and copy it to clipboard or download it as a file.
Frequently Asked Questions
Base64 uses '+', '/', and '=' as padding, which can conflict with URLs. Base64URL replaces '+' with '-', '/' with '_' and removes the '=' padding, making it safe for URLs and filenames.
Base64 encoding increases size by approximately 33% (every 3 bytes become 4 characters). That's why data URIs are inefficient for large files.
NO. Base64 is not encryption, it's just an encoding. Anyone with the Base64 string can decode it instantly. Use bcrypt, Argon2, or scrypt for passwords.