Base64 Encoder/Decoder
Encode and decode Base64 strings instantly. Convert plain text to Base64 or decode Base64 back to readable text. Fast, secure, and works entirely in your browser.
All encoding and decoding happens in your browser. Your data is never sent to any server.
Embed This Tool
Add this tool to your website with customizable styling
How to Use
- 1
Choose your mode
Click "Encode" to convert plain text to Base64, or "Decode" to convert Base64 back to plain text. The tool starts in Encode mode by default.
- 2
Enter your text
Paste or type your text in the input area. For encoding, enter any plain text (including special characters and emojis). For decoding, paste a Base64 string.
- 3
See instant results
The conversion happens automatically as you type. The output appears in the right panel (or below on mobile) in real-time.
- 4
Copy the result
Click the "Copy" button to copy the converted text to your clipboard. You can then paste it wherever you need it.
- 5
Switch modes anytime
Toggle between Encode and Decode modes to quickly convert text in either direction. Use the Clear button to start fresh.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a way to encode binary data (or text) into ASCII characters using only letters (A-Z, a-z), numbers (0-9), and two symbols (+ and /). It's commonly used to embed images in HTML/CSS, send binary data over text-based protocols like email or JSON APIs, and encode credentials in HTTP headers. Base64 encoding increases the data size by about 33%, but ensures the data can be safely transmitted as text.
When should I use Base64 encoding?
Use Base64 when you need to transmit binary data (like images or files) through text-based systems such as JSON APIs, XML, or email. It's also used for embedding small images directly in CSS or HTML (data URIs), encoding authentication credentials in HTTP Basic Auth headers, and storing binary data in databases that only support text. However, Base64 is NOT encryption — it's easily reversible and provides no security.
Is Base64 encoding secure?
No, Base64 is NOT a security or encryption method. It's simply an encoding format that makes binary data text-safe. Anyone can decode Base64 strings instantly using tools like this one. Never use Base64 alone to protect sensitive data like passwords or API keys. If you need security, use proper encryption methods (like AES) or hashing algorithms (like SHA-256). Base64 is about compatibility, not security.
Why am I getting an "Invalid Base64" error?
This error occurs when the input string isn't valid Base64. Common causes include: missing or incorrect padding (Base64 strings should end with = or == if needed), invalid characters (only A-Z, a-z, 0-9, +, / are allowed), or corrupted data from copy-paste. Try removing extra whitespace, checking for typos, or verifying the source of your Base64 string. If you're encoding text that contains special characters, make sure it was properly UTF-8 encoded first.