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Base64 Encode / Decode

Encode or decode plain text strings to and from Base64 format.

Input Source 0 chars | 1 line
Output Results
0 chars

About Base64 Encode / Decode

The Base64 Encode / Decode is a secure serialization encoder designed to help developers safely format text and files. It helps you encode or decode plain text strings to and from base64 format. Because encoding is frequently used on user data, running this process locally ensures that sensitive user tokens or file contents remain secure.

Key Features

  • Broad Format Support: Works with URL encode/decode, Base64 strings, Base32, and Base58 cryptography systems.
  • File-to-Base64: Drag and drop binary assets (like PNGs or PDFs) to convert them into inline DataURI strings.
  • Binary Decoding: Convert Base64 strings back to visual, downloadable image files or raw configurations.
  • UTF-8 Representation: Inspect raw byte representations of unicode characters.

How to Use

  1. Input your plain text string, or paste an encoded token block in the input box.
  2. For files, drag and drop the document into the file uploader widget.
  3. Select your conversion action (e.g. Encode or Decode).
  4. Review the processed code and save it using the copy or download actions.

Common Use Cases

  • Escaping complex query strings in URLs to prevent server-side route errors.
  • Encoding image assets into inline base64 strings to bundle them directly inside CSS or HTML files.
  • Decoding user web tokens (JWTs) or base64 attachments to inspect raw parameters during API debug runs.

Related Tools

URL Encode / Decode Safely encode or decode URLs to handle special characters and query strings. Base32 Encode / Decode Encode or decode plain text to and from RFC 4648 Base32 format. Base58 Encode / Decode Encode or decode text to Base58 format (commonly used in crypto addresses). HTML Escape Entities Encode special characters into HTML entities or decode them back to text.

Frequently Asked Questions

What is the Base64 Encode / Decode on onlineunitcalc?

The Base64 Encode / Decode is a free, fast, client-side developer tool available on onlineunitcalc. It allows you to encode or decode plain text strings to and from base64 format. in your browser without uploading your input to our servers.

Can I convert large files using the Base64 Encode / Decode?

Yes. Since all calculations are done directly inside your browser using the local system CPU, you can convert files locally without any upload size bottlenecks or slow internet delays.

How do I export my converted data from the Base64 Encode / Decode?

You can copy the output directly to your clipboard using the 'Copy' button, or click the 'Download' button to save the output as a text file directly onto your computer.