Base64 Encode
Encode text (including Unicode and emoji) into base64, with a built-in decode direction for round-tripping. Runs entirely in your browser.
Updated September 2026 · Written and verified by Akash Pandey
Base64 Encode
How to use the encoder
- Paste or type the text you want to encode.
- Click Encode (or type and let it run live).
- Copy the base64 string, or switch direction to decode an existing string and verify it.
Frequently asked questions
What is base64 used for?
Representing binary data as ASCII text - commonly for data URLs, email attachments, API tokens and embedding images in HTML/CSS.
Does it support Unicode and emoji?
Yes. Text is encoded as UTF-8 before base64, so "café ☕" round-trips perfectly instead of producing mojibake.
What happens with malformed base64 when decoding?
The decode direction strips whitespace and reports a clear error on characters it cannot accept, rather than silently returning garbage.
Is base64 encoding encryption?
No. It is an encoding, reversible by anyone. Do not use it to protect secrets.
Is my data sent anywhere?
No - encoding happens with browser APIs locally. Nothing leaves your device.
Does this encoder support UTF-8 and special Unicode characters?
Yes. It uses modern TextEncoder to ensure international characters, emoji, and accented letters encode into valid Base64 bytes without character corruption.
What is Base64 encoding used for?
Base64 is used to represent binary data, images, credentials, or tokens as ASCII strings so they can be safely transmitted over email, URLs, or JSON APIs.
Is Base64 the same as encryption?
No. Base64 is an encoding format, not encryption. Anyone can decode a Base64 string back to plaintext in milliseconds; it provides zero cryptographic secrecy.