Does this tool support emojis and diacritics?
Yes. Unlike simple implementations, this tool safely converts UTF-8 strings into binary arrays before encoding them to Base64, preserving all characters.
← Back to all tools
Text
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text securely in your browser with full UTF-8 support for safe data transfer.
Privacy
Tool workspace
How Base64 conversion works
Select whether you want to encode text or decode a Base64 string. The tool properly handles UTF-8 characters (including emojis and special symbols) securely in your browser.
Use cases
Encode data for basic obfuscation, safe data transmission in URLs, API requests, or embedding images and fonts in CSS/HTML.
Privacy
All conversions are performed locally in your browser memory. Your data is never sent to a server.
Limitations
Extremely large inputs might slow down your browser since all processing happens on the main thread.
Base64 Converter FAQ
Is my data sent anywhere?
No. The encoding and decoding processes run entirely in your browser.
Why do I get an invalid decode error?
The error occurs if the input is not a valid Base64 string, or if it decodes into an invalid UTF-8 sequence.
Are line breaks ignored during decoding?
Yes, standard whitespace and newlines are stripped from the Base64 input before decoding to ensure compatibility.
Related tools
Security
JWT Decoder
Decode and analyze JSON Web Tokens securely in your browser. Your tokens are processed locally and never sent to any servers.
Text
Text Converter
Convert rich text into HTML, Markdown, and JSON in your browser with sanitized preview, copy actions, downloads, and clear document stats.
Codes
JSON to TypeScript
Convert JSON objects into TypeScript interfaces automatically. Paste your JSON and get strongly-typed interfaces instantly.