Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 to text. UTF-8 safe. Free, runs in your browser, no signup required.
Free Base64 Encoder & Decoder — No Signup Required
Encode any text to Base64 or decode Base64 back to readable text instantly. Fully UTF-8 safe — handles emoji, CJK characters, accented letters, and any Unicode text without issues.
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data as an ASCII string. It is widely used in email attachments (MIME), embedding images in HTML/CSS via data URIs, JSON Web Tokens (JWT), and transmitting data over text-only protocols. Each Base64 character represents 6 bits of data, making the encoded output roughly 33% larger than the original.
Is it really free?
Yes. This tool runs entirely in your browser — your data never leaves your device. No signup, no limits, no API calls. Use it as many times as you want.
Is my data safe?
Absolutely. Base64 encoding and decoding happen 100% client-side in your browser. Your data is never sent to any server. This makes it safe for encoding API keys, tokens, passwords, and other sensitive information.
Does it support UTF-8 and Unicode?
Yes. Unlike many Base64 tools that break on non-ASCII characters, this encoder properly handles UTF-8 text including emoji, Japanese, Chinese, Korean, Arabic, Cyrillic, and all other Unicode characters. We use the Web API TextEncoder and TextDecoder for reliable multi-byte support.