Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to text.
Everything is converted in your browser. Nothing you type is sent anywhere.
Tool
Text ↔ Base64
Conversion runs locally in your browser as you type.
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Processing happens locally in your browser whenever possible.
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About the Base64 encoder / decoder
Convert text to Base64, or decode Base64 back to text. Switch direction with Encode / Decode — Unicode text (accents, emoji, and other multi-byte characters) round-trips correctly.
How it works
Encoding first turns your text into UTF-8 bytes, then Base64 — this is why emoji and accented characters encode correctly, unlike a naive btoa() call. Decoding reverses both steps.
Not for binary files
This tool expects the decoded bytes to be valid UTF-8 text. If you paste Base64 for an image or other binary file, decoding will report an error instead of producing garbled text.
Limits
Input up to 5,000,000 characters. Base64 input must use standard characters (A–Z, a–z, 0–9, +, /) with correct padding.
Privacy first
Conversion runs locally in your browser. Nothing you type is sent to a Dockzio server.
FAQ
Quick answers to common questions.