Encode and decode Base64 data instantly. Supports UTF-8 characters and works entirely in your browser.
Result will appear here...
Encode text to Base64 or decode Base64 strings instantly. Supports UTF-8/Unicode characters. Free, fast, and secure - runs entirely in your browser.
Paste your text into the encoder. We convert the characters into their 8-bit binary representation before mapping them to the Base64 character set.
Unlike basic encoders, we handle multi-byte Unicode characters (like emojis), ensuring your symbols stay intact during the encoding/decoding process.
Switch to Decode mode to transform a Base64 string back into readable text. The tool automatically validates the string's padding and structure.
Convert small CSS assets, icons, or JSON metadata into Base64 strings to embed them directly into source code.
Generate the correctly encoded strings required for Basic Auth headers or custom API key transmissions.
Encode complex data for transmission in URL parameters, avoiding issues with special characters and reserved symbols.
All processing happens directly in your browser. Your data never leaves your device — we don't upload, store, or have access to any of your content.
No server roundtrips means instant results. Once this page is loaded, the tool works even without an internet connection.
No. Base64 is an encoding scheme, not encryption. It is intended for representing binary data as printable text and provides no security or privacy.
Base64 encoding increases data size by roughly 33% because it uses 4 characters to represent every 3 bytes of raw data.
This version is optimized for text and small snippets. For large binary files, we recommend using localized system tools to avoid browser memory issues.