Advertisement

🔐 Base64 Encoder/Decoder

Encode or decode text and files to/from Base64 instantly

Input
Output
⚠️ Invalid Base64 input. Please check and try again.
Advertisement

About This Tool

Base64 Encoder / Decoder

Encode any text or file to Base64 format and decode Base64 strings back to readable content — all in your browser.

Why Use This Tool?

  • Encode images or files to embed them directly in HTML, CSS, or JSON
  • Decode Base64 data received from APIs or backend responses
  • Safely transmit binary data over text-based protocols like email or HTTP
  • Used by developers to handle authentication tokens and credentials
  • Useful for embedding fonts or icons directly into stylesheets

Overview

Base64 is a binary-to-text encoding scheme that converts binary data into a sequence of printable ASCII characters. It is one of the most widely used encoding methods in web development, API communication, and data storage. Our Base64 Encoder and Decoder tool lets you instantly convert any text or file content to Base64 format, and decode any Base64 string back to its original readable content — all in your browser. Base64 encoding is critical when you need to transmit binary data over channels that only support text, such as embedding images in CSS or HTML, passing data through APIs, or including attachments in JSON payloads. Unlike encryption, Base64 is not meant to hide data — it is simply a way to safely represent binary data as text. Developers use Base64 daily for tasks like encoding authentication credentials, embedding images in HTML email templates, and handling file uploads through REST APIs. Our tool handles all text encodings including UTF-8 and supports standard and URL-safe Base64 variants.

How to Use

  • 1

    Select Encode or Decode

    Choose whether you want to encode plain text into Base64, or decode a Base64 string back to readable text.

  • 2

    Paste Your Input

    Type or paste your text (for encoding) or your Base64 string (for decoding) into the input area.

  • 3

    Process Instantly

    The result appears instantly in the output panel as you type — no button press needed.

  • 4

    Copy the Output

    Click the Copy button to copy the encoded or decoded result to your clipboard.

  • 5

    Download if Needed

    For large Base64 outputs, use the Download button to save the result as a text file.

Frequently Asked Questions

No. Base64 is an encoding scheme, not encryption. It does not hide or secure your data — anyone can decode it. Use it only for data representation, not security.
Base64 uses padding characters (=) to ensure the output length is always a multiple of 4. One or two = signs indicate how many padding bytes were added.
Yes, you can paste a file's binary data or use the file upload option to convert images to Base64 strings for embedding in HTML or CSS.
Standard Base64 uses + and / characters which are special in URLs. URL-safe Base64 replaces them with - and _ to make the string safe for use in query parameters.
The tool handles text of any reasonable size in the browser. For very large files (>10 MB), processing may be slower depending on your device.

Similar Tools You Might Like

Regex Tester

Test expressions with match highlighting.

URL Encoder/Decoder

Encode special URL query parameters.

CSS Minifier

Compress and minify CSS stylesheets.