VOLTUTILS

Base64 Encoder / Decoder

Encode or decode text to and from Base64 string formats.

100% Local Processing

About the Base64 Encoder / Decoder

Base64 encoding is commonly used when there is a need to encode binary data into an ASCII string format. Our Base64 encoder/decoder allows you to quickly translate text back and forth. The conversion happens entirely in your browser; we do not log or store any of your data.

How to encode or decode Base64

  1. Select Encode or Decode in the tool.
  2. Paste text into the input panel and review the result.
  3. Copy the output into the header, data field, test fixture, or application where it is needed.

Examples and worked results

Simple text

Input
Hello
Result
SGVsbG8=

Base64 changes representation; it does not encrypt or password-protect the text.

Encoding, not encryption

Base64 maps binary data to a text alphabet so it can travel through systems that expect text. The browser implementation handles text through UTF-8-aware conversion, but decoding arbitrary binary data into readable text may not produce meaningful characters.

Common use cases

  • Inspecting Basic Authentication payloads during development
  • Representing small assets or bytes in data URLs
  • Checking encoded values in API requests and test data

Important notes and limitations

  • Base64 adds size overhead and offers no confidentiality. Never treat a Base64 string as a secret.
  • Very large inputs can use substantial browser memory.

Practical tips

  • Decode only data you are allowed to inspect, and validate the decoded value before using it in an application.

Frequently Asked Questions

Is my data sent to a server?

No, all Base64 encoding and decoding is processed locally in your web browser.

Related tools

Image to Base64 Converter

Encode PNG, JPEG, or WebP images as Base64, or decode Base64 back to an image.