Base64 Encoder
Encode and decode Base64 strings instantly. Free online Base64 tool with support for text and UTF-8. 100% client-side.
About Base64 Encoder
Encode text to Base64 or decode Base64 back to text instantly. Supports UTF-8 encoding. Fast, free, and private — all processing happens in your browser.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data as ASCII characters. It's commonly used in data URLs, email attachments, and API payloads.
Does this support UTF-8?
Yes. Our encoder properly handles UTF-8 characters including emojis, accented characters, and non-Latin scripts.
Is there a size limit?
There is no hard limit, but very large inputs may slow down your browser since everything runs client-side.