Base64 Encoder / Decoder
Encode plaintext to Base64/Base64URL and decode Base64 data back to readable UTF-8 strings.
How to Use Base64 Encoder / Decoder
Type or paste text into input box.
Toggle between Encode and Decode modes.
Copy the converted string.
Base64 Encoder / Decoder runs 100% client-side in your web browser. Your data, passwords, keys, and files are processed using the Web Crypto API and never transmitted to any server. Zero telemetry, zero storage, zero cloud processing.
Frequently Asked Questions
What is the difference between Base64 and URL-Safe Base64?
URL-Safe Base64 replaces '+' with '-' and '/' with '_', avoiding URL encoding conflicts.
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