Website Tools
Base64 Encoder / Decoder
Instantly encode or decode Base64 text, right in your browser.
Enter text below to instantly encode or decode it as Base64 - entirely in your browser, nothing is sent to our servers.
Base64 represents any data using 64 printable characters (A-Z, a-z, 0-9, + and /), with = used as padding at the end. It appears in data URIs, email attachments, HTTP Basic authentication headers, and - in a URL-safe variant - in JSON Web Tokens. Text is converted to UTF-8 before encoding, so accented characters and emoji survive the round trip. Base64 is an encoding, not encryption: anyone can decode it, so it must never be used to hide passwords or secrets. JustChecker builds tools that respect your data - this one never leaves your browser.
Frequently Asked Questions
No - this tool runs entirely in your browser using JavaScript. Nothing you type is transmitted anywhere.
Yes - it correctly handles UTF-8 text including accented letters, non-Latin scripts, and emoji, not just plain ASCII.
No - Base64 is only an encoding format, not encryption. Anyone can decode it instantly; it should never be used to protect sensitive data.