Base64 Encoder / Decoder
Encode and decode Base64 locally in your browser. Supports text conversion, URL-safe Base64, and file-to-Base64 export.
🔒 Zero network requests. Encoding happens entirely in your browser.
File to Base64
Choose a file to encode it directly to Base64.
Frequently Asked Questions
What is URL-safe Base64?
URL-safe Base64 replaces + with -, / with _, and removes trailing = so the output is safer to place inside URLs.
Can I encode files?
Yes. Choose a file and the tool converts its bytes to Base64 locally, without uploading anything.
Why might decoding fail?
Decoding fails when the input is not valid Base64 or when the bytes do not represent valid UTF-8 text.