Encode any text to Base64 or decode Base64 back to text. Supports standard and URL-safe variants. All processing happens in your browser — nothing is sent anywhere.
Encodes binary data as ASCII text using 64 characters. Used to embed images in HTML, transmit binary in emails, and store binary in JSON.
No. Base64 is encoding, not encryption. Anyone can decode it — it provides zero security. Use AES for encryption.
Many systems handle only text. Base64 allows binary files to be safely transmitted as text, adding approximately 33% overhead.
Use: img src="data:image/png;base64,YOUR_STRING". This embeds the image directly without a separate file request.
Replaces + with - and / with _ making output safe for URLs. Used in JWT tokens and URL-safe data transmission.