Base64 Encode / Decode
Base64 Encoder and Decoder
Encode text or files to Base64. Decode Base64 strings back to original data. Essential for web development.
Privacy: Processing happens in your browser. Files and text are not uploaded to Anwita Digital servers.
How to use this tool
- Choose Encode or Decode mode
- For encoding: enter text or upload file
- For decoding: paste Base64 string
- Click Encode or Decode button
- Copy result or download decoded file
- Use for data URIs, email encoding, API payloads, or embedding images
About Base64 Encode / Decode
Base64 encoding converts binary data to ASCII text using 64 printable characters. It's commonly used for embedding images in HTML/CSS (data URIs), encoding email attachments, transmitting binary data over text-based protocols, and API payloads.
Base64 is encoding, not encryption, it provides no security. Encoded data is easily decoded. Use Base64 for format conversion or compatibility, not confidentiality.
All encoding/decoding happens locally using browser's atob/btoa functions and FileReader API. No data is uploaded, safe for sensitive files or proprietary images.
Frequently asked questions
No. Base64 is encoding, not encryption. Anyone can decode Base64 instantly. Don't use it to hide passwords, secrets, or sensitive data. Use proper encryption (like AES) for security.
Base64 represents 3 bytes with 4 ASCII characters, increasing size by ~33%. Trade-off: binary data becomes text-safe for email, JSON, URLs, but at cost of size increase.
Data URIs embed files directly in HTML/CSS using Base64. Format: data:image/png;base64,iVBORw0KG... Useful for small images, icons, or reducing HTTP requests, but increases HTML size.