Encode text to Base64 or decode Base64 strings back to text. UTF-8 safe. Runs entirely in your browser.
Base64 converts binary or text data into a string of ASCII characters. Commonly used to embed images in HTML/CSS (data URIs), encode credentials (HTTP Basic Auth), and pass binary data through text-only systems.
No. Base64 is encoding, not encryption — it's trivially reversible by anyone. Never use it to secure sensitive data. Use proper encryption (AES, RSA) for security.
Base64 encodes data in 6-bit groups. If input isn't divisible by 3 bytes, padding characters (=) are added to make output a multiple of 4 chars. One = means 1 byte of padding, == means 2 bytes.
Standard Base64 uses + and / which have special meaning in URLs. URL-safe Base64 replaces + with - and / with _, making the output safe for URLs and filenames without percent-encoding.
From developer tools to live websites — Snapweb gets your site published in under 60 seconds.
Try Snapweb for free →