How to Use the Base64 Encode & Decode Tool
Base64 encoding converts binary data into ASCII text, making it safe to transmit over text-based protocols like email and HTTP. The ToolPrime Base64 tool lets you encode any text to Base64 or decode Base64 strings back to readable text. Full UTF-8 support, and all processing happens in your browser.
1 Open the Base64 Tool
Navigate to the Base64 Encode & Decode tool page.
2 Choose encode or decode
Select the Encode tab to convert text to Base64, or the Decode tab to convert Base64 back to text.
3 Enter your data
Paste or type the text (or Base64 string) into the input area.
4 Copy the result
The output appears instantly. Click the copy button to copy the result to your clipboard.
Common Use Cases
- Encoding API authentication tokens
- Embedding small images as data URIs in HTML or CSS
- Encoding email attachments for SMTP transport
- Debugging Base64-encoded JWT tokens
Pro Tips
Base64 encoding increases data size by approximately 33%.
Use Base64 data URIs for small images only (under 10KB) to avoid performance issues.
The tool handles UTF-8 characters correctly, including emojis and accented letters.
Try it yourself
Open Base64 Encode & Decode