🔣 Base64 Encoder / Decoder
Encode text or files to Base64, or decode Base64 back to readable text. Free and instant.
Convert plain text to Base64-encoded strings for safe transport in text-based protocols like JSON, XML, and data URIs, or decode Base64 back to its original content. A tabbed interface keeps encode and decode modes separate, with a swap button to quickly reverse direction. The output is ready to copy with a single click.
📋 When to Use the Base64 Encoder & Decoder
The Base64 Encoder & Decoder is ideal for anyone who needs quick access to a professional-grade base64 encoder & decoder without installing software. Use it when you need to create on the go, when working from a locked-down computer, or when you want instant results without signups or app stores. It's perfect for students, designers, developers, marketers, and anyone who values speed and privacy. Because everything runs in your browser, your data never leaves your device — making it safe for work, school, and personal projects.
⚙️ How the Base64 Encoder & Decoder Works
The Base64 Encoder & Decoder runs entirely in your browser using client-side JavaScript. When you interact with the tool — entering text, adjusting settings, or clicking Generate — the browser processes your input using built-in algorithms and renders the output in real time. No data is ever sent to a server. For CDN-loaded libraries (like QR code generation), the library code downloads once to your browser and then runs locally — your data stays on your device throughout the entire process.
How to Use the Base64 Encoder / Decoder
- Enter text or paste Base64-encoded data into the input area.
- Choose Encode to convert text to Base64, or Decode to convert Base64 back to text.
- The result appears instantly — click the Copy button to save it to your clipboard.
- Use the swap button to quickly reverse the operation on the output.
Frequently Asked Questions
What is Base64 encoding used for?
Base64 encoding converts binary data into ASCII text, making it safe for transmission over text-based protocols like email (MIME), JSON, XML, and data URIs. It's widely used for embedding images in HTML/CSS and encoding API credentials.
Is Base64 encryption?
No. Base64 is encoding, not encryption. It provides no security — anyone can decode Base64 data. Do not use it to protect sensitive information. Use proper encryption (AES, RSA) for security.
Does this tool handle file uploads for Base64?
The Base64 Encoder / Decoder works with text input. To encode files, you can paste the Base64 text representation into the decoder. For generating Base64 from files, use a file-to-Base64 converter.
Are there different Base64 variants?
Yes, there are several variants (standard, URL-safe, MIME). This tool uses the standard Base64 alphabet with '=' padding, which is the most common variant for general use.