Base64 Encoder/Decoder
Convert text to Base64 encoding and decode Base64 strings back to plain text.
Uses
- Encode passwords or sensitive data for storage
- Convert images and files to Base64 strings
- Decode API responses in Base64 format
- Data transmission and email encoding
What Base64 is really for
Base64 takes any data and re-expresses it using a small, safe set of text characters, so it can travel through systems that only understand plain text — email being the classic example. You'll also meet it in data URIs, JSON Web Tokens and basic-auth headers. It's an encoding, not a lock.
One important caveat
Base64 is not encryption. Anyone can decode it back to the original in a single step, with no key required. If you ever see a secret "protected" by Base64 alone, that's a bug, not a safeguard. We explain the difference in Base64 Isn't Encryption. Use this tool to encode or decode instantly — everything happens in your browser.
Frequently Asked Questions
Is Base64 a form of encryption?
No. Base64 is an encoding scheme, not encryption. Anyone can decode Base64 data instantly — it provides no security. It is only used to represent binary data in text form, not to protect it. For security, use proper encryption algorithms like AES.
Is my data safe when using this Base64 tool?
Yes. All encoding and decoding happens in your browser using JavaScript. No data is sent to any server. Your text or credentials remain completely private.
Why does Base64 end with == sometimes?
The "=" characters are padding added to make the encoded output length a multiple of 4. If the input length is divisible by 3, no padding is needed. If the remainder is 1 byte, "==" is added. If 2 bytes, "=" is added.