Does Base64 protect confidential information?

No. It is reversible encoding, not encryption, and requires no secret key to decode.

How does URL-safe Base64 differ?

It uses - and _ instead of + and /, making values easier to place in URLs. Padding may also be omitted.

Can Unicode text round-trip correctly?

Yes. Text uses UTF-8, so Greek, accented scripts and emoji are handled as bytes and strictly decoded.

What if decoded data is not text?

File mode prepares the recovered bytes as a Blob download. Active decoded content is never executed in the page.

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Base64 Encoder & Decoder

Move Unicode text or raw files into Standard or URL-safe Base64, and recover decoded text or binary downloads safely.

Mode

Input Type

Variant

Padding

Text Input

Input: 0 characters / 0 B

Base64 Output

Run Encode to view the result.

Output details will appear after processing.

Your data is processed locally in your browser and is not uploaded.

How to use Base64 Encoder & Decoder

1
Choose Encode or Decode, then select Text or File.
2
Select Standard or URL-safe Base64 and decide whether to keep padding.
3
Enter text, paste Base64 or choose a local file.
4
Run the operation and review text output or decoded-file details.
5
Copy text, download the output or use a text result as the next input.

Frequently asked questions

About Base64 Encoder & Decoder

Base64 bridges binary data and text-only channels, but text and file workflows need different safeguards. This tool encodes UTF-8 strings or exact file bytes with Standard or URL-safe alphabets, while keeping padding an explicit choice.

Malformed input is rejected and text mode verifies UTF-8. File mode can recognize a Data URI and retain its declared media type for download without rendering active content. Every operation stays in the browser.