Base64 Encode
Encode any text to Base64 instantly — fully Unicode-safe, so emoji and non-Latin characters round-trip correctly. It runs entirely in your browser.
- 🔒 100% private — no uploads
- 🆓 Free, no watermark
- 📱 Works on any device
How to encode
- 1
Paste or type your text
Type directly or paste your text into the box. It’s processed right in your browser — nothing is uploaded to a server.
- 2
See the result instantly
The tool updates live as you type, showing the Base64 output with no “submit” button or waiting.
- 3
Copy or keep going
Copy the result with one click, tweak your input, or clear it and start again. Free, instant and private.
Why use Base64 Encode?
Unicode-safe
Encodes via UTF-8, so emoji, accents and non-Latin scripts encode and decode back exactly.
Instant & copyable
The Base64 result updates as you type and copies with one click.
100% private
Everything runs locally in your browser with JavaScript. Your text is never uploaded, stored or seen by anyone — it even works offline.
Works on any device
No install and no account. Runs in any modern browser on Windows, macOS, Linux, Android or iPhone.
What Base64 actually does
Base64 turns arbitrary bytes into a string built from 64 safe characters (A–Z, a–z, 0–9, + and /, with = as padding). Every 3 bytes become 4 characters, so the output is about 33% larger than the input — the price of surviving systems that only handle plain text. It exists because email, JSON, XML and URLs can mangle raw binary; Base64 gives the bytes a text-safe disguise.
Where you’ll use it
Common uses: embedding small images in CSS or HTML as data: URIs, HTTP Basic auth headers, email attachments (MIME), and stuffing binary blobs into JSON APIs. One thing Base64 is not: encryption. Anyone can decode it instantly, so never treat an encoded value as hidden — it’s a transport format, not a lock.
Frequently asked questions
Is the encoding Unicode-safe?
Yes. Text is encoded as UTF-8 before Base64, so emoji and non-Latin characters survive a round-trip — unlike a plain btoa() which throws on them.
Is my text uploaded to a server?
No. The tool runs entirely in your browser, so whatever you type or paste stays on your device. It’s safe for code, tokens and confidential text, and works offline once loaded.