1
Paste Content
Enter text or upload a file to encode/decode.
Or encode a small PNG / JPG file to a Base64 string (max 2500 KB)
Pro Tip
Base64 encoding increases file size by about 33%. Use it for embedding small images in CSS/HTML, not for large file transfers.
How to Use the Base64 Encoder/Decoder
2
Select Mode
Choose encode or decode operation.
3
Copy Result
Get the base64 string or decoded content.
Base64 Encoding Explained
Base64 is a binary-to-text encoding scheme used to represent binary data in ASCII string format. It's commonly used in email attachments, data URLs, and API responses.
Frequently Asked Questions
Base64 is an encoding method that converts binary data into ASCII text using 64 different characters.
Use Base64 for embedding small images in HTML/CSS, transmitting binary data over text-only protocols, or encoding credentials.