Base64 Encode & Decode Online
Free Base64 encoder and decoder. Convert text to Base64 and back with full Unicode support and an optional URL-safe format. Runs in your browser.
Runs in your browser — your data is never uploaded.
Base64 turns binary or text data into a safe string of letters and numbers, commonly used in APIs, emails and data URLs. Use this tool to encode text to Base64 or decode Base64 back to readable text, with full Unicode support and an option for URL-safe Base64.
How to use the Base64 Encoder & Decoder
- Choose Encode or Decode.
- Paste your text or Base64 string.
- Copy the result.
Base64 Encoder & Decoder — frequently asked questions
Is Base64 encryption?
No. Base64 is an encoding, not security. Anyone can decode it, so never use it to protect secrets.
What is URL-safe Base64?
A variant that replaces + and / with - and _ so the string can be used in URLs.
Why does decoding fail?
The input may contain invalid characters or missing padding. Check that it is complete.
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