Base64 Encode / Decode
Encode and decode Base64 text safely in your browser with Unicode support.
Base64 text
Encode and decode Base64 with Unicode-safe browser APIs.
Free Base64 encoder and decoder
Convert plain text to Base64 or decode Base64 back to readable Unicode text without uploading anything.
How to Use Base64 Encode / Decode (Step-by-Step)
Paste the text or Base64 value.
Choose Encode or Decode.
Copy the converted output.
Applications
Common Use Cases
- Inspect Base64 strings from APIs, configs, or examples.
- Encode short text values for testing and development.
- Decode safe text payloads without installing a developer tool.
Privacy Guarantee
Zero Server Uploads
Unlike traditional online converters that upload your confidential documents to external cloud servers, MultiToolX executes computations in your browser runtime via HTML5 Canvas, Web Crypto, and WebAssembly.
Your data never leaves your device and cannot be viewed, stored, or harvested by anyone.
Base64 Encoding and Decoding Guide for Text and Images
Understand how Base64 encoding transforms binary data into 64 printable ASCII characters. Includes data URI examples and Unicode text handling.
FAQ
Frequently Asked Questions
Is Base64 encryption?
No. Base64 is encoding, not security. Anyone can decode it.
Why does decoding fail?
The input may not be valid Base64 or may represent binary data that is not readable text.
Can it handle Unicode text?
Yes. The tool is built to encode and decode Unicode text safely.
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