Base64 Encode Online
Use Base64 Encode Online, review the result, and keep the original until the output is checked.
Input Text
Output
How to use Base64 Encode Online
- Type or paste text into the box, or Upload File to encode a file\u2019s bytes instead.
- Set Character Set - UTF-8 (Unicode) for anything with accents, emoji or non-latin scripts.
- Tick URL Safe Encoding if the string goes into a URL, and Break Lines if the format expects wrapped text.
- Add Data URI Prefix after uploading a file to get the data:... form browsers and CSS accept.
- Copy the result, or Download it as Plain Text (.txt), JSON, XML, CSV or an HTML snippet.
What Base64 Encode Online actually does to your file
Output appears as you type, so there is no Encode button to press. The string is roughly 4/3 the size of the input, and a Base64 variant with URL-safe characters substituted is still valid Base64 - the receiving side just has to know which variant it got. Encoded from UTF-8 here, accents and emoji survive the round trip.
Base64 Encode Online FAQ
What does Base64 Encode Online do?
Use our free Base64 encoder online . Encode text and files instantly, unlimited usage, secure processing—all in your browser.
Which files work with Base64 Encode Online?
This category commonly supports text, images, and binary files. Use the accepted file types shown in the uploader, because support varies by browser and by the engine behind each tool.
Is Base64 a way to protect data?
No. Base64 is reversible by anyone who has the text and adds about a third to the size. Treat it as an encoding, not as encryption or compression.
Will my original file be changed?
No. You paste text or open a file to read it, the result appears in the other pane, and only what you copy or download leaves the page.
How is my file processed?
It is not uploaded. The processing is done locally by the encoder bundled with this page, so the practical ceiling is your device's memory and the limit shown beside the uploader - no queue, no account, no copy on a server.
Is the Base64 Encode Online free?
Yes. The Base64 Encode Online is free with no trial limit, subscription, or watermark on downloads. You can use it for personal and commercial projects without creating an account.