Base64 Encode
Runs in your browser — your data is never uploaded.
Convert any text to Base64 instantly. OkConverter encodes your input as UTF-8 first, so emoji, accented characters and non-Latin scripts encode correctly — not just plain ASCII. Everything runs locally in your browser, which matters when you’re encoding tokens, credentials or other sensitive strings: nothing is ever sent to a server.
0 characters · runs entirely in your browser
How to use Base64 Encoder
- 1
Paste or type your text into the box.
- 2
Click “Encode” — the Base64 string is produced instantly in your browser.
- 3
Copy the result to your clipboard, or download it as a .txt file.
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Paste this where you want the tool to appear. It runs entirely in your visitor's browser — no uploads, no account, no tracking.
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Frequently asked questions
Is my text uploaded anywhere?+
No. The encoding runs entirely in your browser with JavaScript. Your text never leaves your device — nothing is uploaded, stored, or logged. That makes it safe even for API keys and other secrets.
Does it handle emoji and non-English characters?+
Yes. The text is encoded as UTF-8 bytes before Base64 conversion, so emoji, accents and CJK characters round-trip correctly — unlike naive btoa()-based tools that fail on anything outside Latin-1.
What is Base64 used for?+
Base64 represents binary or text data using only 64 safe ASCII characters. It’s used in data URLs, HTTP Basic Auth headers, email attachments (MIME), JWT tokens and anywhere binary data must travel through text-only channels.
Is Base64 encryption?+
No. Base64 is an encoding, not encryption — anyone can decode it instantly. Never use it to protect secrets; it only changes how data is represented, not who can read it.