Base64 Decoder

This tool takes any Base64-encoded string and instantly decodes it back to plain text. Whether you’re handling encoded payloads, text blobs, or embedded data, it gives you readable results on the spot. You can paste in the input or import a file, tweak the decoding behavior using toggles, and see the decoded output update live. It all happens right in your browser with no uploads or reloads.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .log, .md, .csv, .tsv, .json, .xml, .ini, .yaml, .yml, .html, .htm, .css
Total characters: 0
Options
Trim input before decoding
Use UTF-8 decoding
Decode repeatedly

How to Use:

  1. Paste your Base64 string into the left text box.
  2. Or click Choose File to import a Base64-encoded file (.txt, .json, .html, etc.).
  3. Adjust options in the Options box:
    • Trim input before decoding: Removes surrounding spaces.
    • Use UTF-8 decoding: Interprets the output as UTF-8 text.
    • Decode repeatedly: If the string is double-encoded, this will fully unwrap it.
  4. The decoded result shows up live in the right-hand box.
  5. Click Copy Output or Export to File to save it.
  6. Use Clear All to reset both fields and all settings.

What the Base64 Decoder Tool can do:

It transforms Base64 strings like SGVsbG8gd29ybGQh into readable text (Hello world!). You can decode just once or continue decoding in a loop if the input was encoded multiple times. It supports UTF-8 decoding, making it safe for emojis, special symbols, or multilingual text. Everything runs client-side, and results update as you type.

Example:

Input:

SGVsbG8gV29ybGQh

Output:

Hello World!

Common Use Cases:

Use it to decode payloads from APIs, embedded web data, email headers, or exported files. It’s useful for developers, data analysts, and anyone needing to unpack encoded strings without external tools. The tool is fast, private, and built for convenience.

Useful Tools & Suggestions:

If you’re working with encoded content, Base64 Encoder lets you flip it back into its encoded form useful for testing, file embedding, or secure data transfers. And when you’re handling more structured formats, Decode Base64 to Unicode gives you a way to recover readable characters with full character set support.

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