Base64 Encode / Decode
UTF-8 safe Base64 with URL-safe variant and file support
Why people choose us
Private by design
Your input is processed securely and never sold. Client-side tools never leave your browser at all.
Instant & free
No installs, no waiting. Results in seconds, right in your browser, on any device.
Free forever
No sign-up, no watermarks, no limits. All client-side tools are free to use as much as you like.
Frequently asked questions
Why do other tools garble Chinese/emoji text?⌄
JavaScript’s raw btoa() only handles Latin-1. We encode text to UTF-8 bytes first (TextEncoder), so Chinese, Japanese, emoji and every other script round-trip correctly.
What is URL-safe Base64?⌄
A variant (RFC 4648 §5) that replaces + with -, / with _ and drops = padding, so the result can live inside URLs, filenames and JWTs without escaping. Toggle the URL-safe checkbox to encode or decode it.
Is Base64 encryption?⌄
No — it is an encoding, not encryption. Anyone can decode it instantly. Use it for data transport and embedding, never for hiding secrets.