Base64 Encoder & Decoder

Encode plain text into Base64 format, or decode Base64 strings back to readable text format in real-time.

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What is Base64 Encoding?

Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. The term Base64 originates from a specific MIME content transfer encoding.

By splitting binary values into 6-bit boundaries, Base64 converts files, images, or raw text strings into a safe set of 64 characters: uppercase letters A-Z, lowercase letters a-z, numbers 0-9, and symbols + and /, with = used as padding. This makes it ideal for transmitting raw bytes over text-only protocols like email (SMTP) or HTML/XML data packages without risk of corruption.

How to Encode and Decode Base64?

  • Encoding: Translates characters or bytes into Base64 format. E.g., encoding the word "Hello" produces SGVsbG8=.
  • Decoding: Converts a valid Base64 string back into readable plain text or raw bytes.

Features of this Base64 Utility

  • Dual Mode: Seamlessly switch between encoding and decoding within a single dynamic interface. Swapping modes will automatically carry over your outputs for ease of work.
  • Unicode / UTF-8 Support: Correctly encodes and decodes accented letters, emojis, and non-ASCII character structures without throwing errors.
  • Local Safety: All computations are performed strictly client-side inside your browser. No data is sent to external servers, protecting passwords, API keys, and databases.

For separate encoding and decoding, you can also access our standalone Base64 Encoder or Base64 Decoder. Need hash utilities? Try our SHA-256 Generator or MD5 Hash Generator.