Private browser utility
Free Online Base64 Encoder Decoder
Encode and decode Base64 strings locally using browser-native JavaScript.
How to use the Free Base64 Encoder Decoder
Paste text into the input box and choose Encode or Decode. In encode mode, the tool converts plain text into a Base64 string. In decode mode, it converts a valid Base64 string back into readable text. The output appears instantly and can be copied with one click.
Why use a Client-Side Base64 Tool?
Base64 is commonly used in development, email systems, API testing, basic data transport, and configuration workflows. It makes binary or special-character data safer to move through text-only systems, but it should not be confused with encryption.
This tool uses browser-native JavaScript functions and processes the input locally. That matters when developers are checking snippets, test payloads, temporary tokens, or configuration values that should not be sent to an unknown remote server.
Base64 Safety Notes
- Not encryption: Base64 only changes representation. Anyone can decode it.
- Useful for APIs: Encode sample payloads, credentials for local testing, or data URIs during development.
- Validate before use: Invalid padding or corrupted strings can fail decoding.
Frequently Asked Questions
Is Base64 encryption?
No. Base64 is encoding, not encryption. Anyone can decode Base64 text if they have the encoded string.
Is my Base64 text uploaded?
No. Encoding and decoding happen with browser-native JavaScript on your device.