Base64 Encoder
Convert text or any file into a Base64 string. Useful for embedding images in HTML or CSS, sending binary data in JSON, or building HTTP Basic auth headers.
Free · No sign-up · Files stay on your device
How to use Base64 Encode
- 1Type or paste your text, or choose a file.
- 2Tick "URL-safe" if the result goes into a URL.
- 3Copy the Base64 output.
Features
- Full UTF-8 support, including emoji and non-Latin text
- URL-safe Base64 (- and _ instead of + and /)
- Encode any file, with optional data URI
- Instant results as you type
- Data never leaves your browser
What is Base64?
Base64 represents binary data using 64 safe text characters (A–Z, a–z, 0–9, + and /). It makes data about 33% larger but lets it travel safely through systems that only handle text, like email, JSON and URLs.
Base64 is not encryption
Anyone can decode Base64, so never use it to protect passwords or secrets. Use it only to change how data is represented.
Frequently asked questions
Is Base64 encoding secure?
No. Base64 is an encoding, not encryption. Anyone can decode it.
What is URL-safe Base64?
A variant that uses "-" and "_" instead of "+" and "/", and drops "=" padding, so the string can be used in URLs and file names.
Why is my decoded text garbled?
The data is probably binary (like an image or ZIP), not text. Use the download button to save it as a file instead.