Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to plain text — all processing happens in your browser.
Frequently Asked Questions
What is Base64 encoding used for?
Base64 converts binary or text data into a plain ASCII string using 64 safe characters. It is widely used to embed images in HTML/CSS, send data in JSON or XML, and transmit content through systems that only handle text.
How do I decode a Base64 string?
Paste the Base64 string into the decoder and the original text appears instantly. If decoding fails, the input is usually not valid Base64 or is missing padding characters.
What is URL-safe Base64?
Standard Base64 uses + and / characters, which have special meaning in URLs. URL-safe Base64 replaces them with - and _ so the encoded value can be used in links and query strings without further escaping.
Is Base64 a form of encryption?
No. Base64 is encoding, not encryption — anyone can decode it. It hides nothing and provides no security, so never use it to protect passwords or sensitive data.