Base64 Encode & Decode Online
Encode text to Base64 or decode Base64 to text instantly. All processing happens in your browser — your data never leaves your device.
Text to encode
Why Use Our Base64 Tool?
Encode and decode entirely in your browser. Your data never leaves your device or gets sent to any server.
Encode or decode in milliseconds. No uploads, no waiting — just paste and transform.
Switch between encode and decode with one click. Use Swap to quickly flip input and output.
Handles UTF-8 correctly. Encode and decode text with emoji, accents, and any language.
Use on any device — desktop, tablet, or phone. No app to install; your browser is enough.
No sign-up, no limits, no ads. Encode and decode Base64 as often as you need, completely free.
How to Encode or Decode Base64
Three simple steps
- 1Choose Encode or Decode
Click Encode to convert text to Base64, or Decode to convert a Base64 string back to readable text.
- 2Enter Your Input
Paste or type your text (for encoding) or Base64 string (for decoding) into the input area.
- 3Copy or Swap
Click Encode or Decode. Copy the result to your clipboard, or use Swap to move the output into the input and switch modes.
Frequently Asked Questions
Is it really free to use?
Yes. Our Base64 encode/decode tool is completely free. No registration, no limits, and no hidden fees.
Is my data secure?
Yes. All encoding and decoding runs in your browser. Your data never leaves your device or is sent to any server.
Does it support Unicode and special characters?
Yes. The tool uses UTF-8, so it correctly handles Unicode, emoji, accents, and all special characters.
Why does decoding sometimes fail?
Decoding fails when the input is not valid Base64. Ensure there are no extra spaces, line breaks, or invalid characters. Base64 uses A–Z, a–z, 0–9, +, /, and = for padding.