What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters. It is widely used in data URIs, email attachments and web APIs.

What is URL-safe Base64?

URL-safe Base64 replaces + with - and / with _ so the encoded string can be safely used in URLs and filenames without percent-encoding.

Can I encode a file to Base64?

Yes. Use the File to Base64 tab, select your file and click Encode. The tool reads the file locally in your browser and outputs the Base64 string.

Is my data sent to a server?

No. All encoding and decoding happens entirely in your browser. No data is uploaded or stored.

Base64 Encoder / Decoder

Encode or decode Base64 text and files. Includes URL-safe mode, live detection, and image preview.

Mode

🔒 Encode → Base64

🔓 Base64 → Decode

📁 File → Base64

📥 Base64 → File

Plain Text

Base64 Output

Data URI Input

📄

Drag and drop encoded .txt file here
or browse

Validating…

Data URI Output