Base64 Encoder and Decoder Online
Encode text to Base64 or decode Base64 strings online. Free, instant, and 100% client-side with full UTF-8 support. No uploads, no registration required.
Frequently Asked Questions about Base64 Encoding
How do I encode text to Base64?
Paste or type your text into the Encode tab. The Base64 output is generated instantly. Click the copy button to copy the result to your clipboard.
How do I decode a Base64 string?
Switch to the Decode tab, paste your Base64 string, and the original text is decoded instantly in your browser.
What is Base64 encoding used for?
Base64 encoding is commonly used to safely transmit binary data over text-based protocols such as email (MIME), JSON APIs, and HTML data URIs. It converts binary data into a set of 64 printable ASCII characters.
Can I decode Base64 online for free?
Yes, this tool is completely free with no registration required. Simply paste your Base64 string into the Decode tab and get the original text instantly.
Is this Base64 encoder secure?
Yes, this tool is 100% client-side. Your data never leaves your browser and is not sent to any server.
Does it support UTF-8 characters?
Yes, our encoder correctly handles UTF-8 characters, ensuring your international text is encoded and decoded without data loss.
Is there a limit to the text size?
The limit is primarily determined by your browser's memory. For extremely large texts, the browser might slow down, but there is no artificial limit imposed by the tool.