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Developer Tools 100% Free · Client-Side Processing

Base64 Encoder / Decoder

Encode and decode standard strings and files to/from Base64 format.

Developer Tools

Base64 Encoder / Decoder

Encode and decode standard strings and files to/from Base64 format.

Source:
Encodes binary or UTF-8 Unicode characters safely into RFC 4648 standard Base64 string (+~33% size).100% In-Browser Privacy
(0 chars • 0 bytes)

Processing Lifecycle

  1. Input validation checks file integrity and format limits.
  2. Processing runs securely in memory in your web browser.
  3. Download your instant result and revoke temporary buffers.

Private & Secure

Your data stays strictly on your device. Where client-side processing is supported, files never leave your computer or travel over the internet to remote servers.