Base64 Decode

Decode standard and URL-safe Base64 strings back into human-readable text. Full UTF-8 support for international characters, automatic whitespace stripping, and instant client-side decoding.

Private • In-browser processing • Zero server uploads

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How to Use Base64 Decode

1
Paste Base64 String
Paste your encoded Base64 payload into the left input editor.
2
Automatic Decoding
The decoder instantly converts the string into plain text.
3
Copy Plain Text
Click 'Copy Output' to use your decoded plain-text string.

Key Features

Full UTF-8 Unicode Support
Correctly decodes multi-byte emojis and non-Latin characters.
URL-Safe Auto-Detection
Handles '-' and '_' characters and automatically repairs missing padding.
Whitespace Resilient
Strips newlines, spaces, and indentation automatically.
100% In-Browser
All decoding runs on your device with complete privacy.

Common Use Cases

  • Reading encoded JSON Web Token (JWT) payloads and headers.
  • Inspecting Base64-encoded email headers, cookies, and HTTP Basic credentials.
  • Extracting plain text from SVG data URIs or base64 attachments.
  • Troubleshooting API payloads and authentication tokens.

Frequently Asked Questions

The decoder automatically repairs missing padding characters at the end of the string.

Yes! The tool automatically converts URL-safe '-' and '_' characters into standard Base64 characters before decoding.

Yes, all decoding runs strictly within your browser sandbox.

Base64 Encode
Encode text or binary data to Base64 format — supports UTF-8 and URL-safe mode.
UTF8 to Hexadecimal
Convert UTF-8 encoded text to its hexadecimal byte representation.
Hex to Text
Convert hexadecimal strings to readable ASCII or UTF-8 text.
Base64 to Image
Decode a Base64 data URL or raw string back to a viewable image file.
Image to Base64
Convert any image to a Base64 data URL for embedding in HTML or CSS.