Choose input
Enter Unicode text or select one local file.
FREE BASE64 ENCODER
Free Base64 Encoder
Turn UTF-8 text or the original bytes of one file into a Base64 string.
Your input and result are never uploaded or stored.
- 1Enter data
- 2Convert in browser
- 3Use result
1 · Enter data
Enter content to encode
Paste text or choose one file from your device.
No file selected.
2 · Convert in browser
Choose the output format
Base64 is not encryption and does not protect passwords or secret data.
Processing Base64 in your browser…
3 · Use result
Base64 result
Your copyable and downloadable Base64 result will appear here.
FREE BASE64 ENCODER
Encode text and files to Base64 online free
Create the result in your browser without installing or uploading anything.Choose format
For files, use standard Base64 or a Data URL with MIME information.
Use the result
Copy the string or download it as a TXT file.
LOCAL BASE64 TOOL
Your text and files stay on your device
Only the conversion runs in a separate browser thread.
No server upload
Input and output stay only in browser memory.
Web Worker
Conversion runs away from the main interface.
RFC 4648
Uses the standard Base64 alphabet and padding.
FREE BASE64 ENCODER FAQ
Base64 encoder FAQ
Review formats, privacy, downloads, and limits.1Can I encode Unicode and emoji?
Yes. Text is converted to UTF-8 bytes before Base64 encoding, preserving multilingual text and emoji.
2Is my file uploaded to a server?
No. File reading and Base64 conversion run only in your browser memory.
3What is the difference between Base64 and a Data URL?
Standard Base64 contains only the encoded string. A Data URL also includes the file MIME type.
4Does Base64 make a file smaller?
No. Base64 is usually about 33% larger than the original bytes and is neither compression nor encryption.