Developer Tools

Base64 Encoder and Decoder

Convert text or file bytes to Base64, or decode Base64 back to readable text or binary data.

Browser-only processingYour files are processed locally in your browser and are never uploaded to our servers.

Browser-only processing

What Base64 Encoder and Decoder does

Base64 represents binary data with printable characters; it is encoding, not encryption.

Supported formats or input: Supports UTF-8 text, standard Base64 and local file bytes within the displayed limits.

How to use Base64 Encoder and Decoder

  1. Choose text or file mode.
  2. Enter data and select encode or decode.
  3. Copy the result or download decoded bytes.

Example and processing method

Example: Encoding the UTF-8 text Toolare produces VG9vbGFyZQ==.

Text is converted through UTF-8 bytes before Base64 encoding so non-ASCII characters are handled correctly.

Common mistakes and limitations

Common mistake: Do not use Base64 to protect secrets; anyone can decode it.

Large files increase memory use because the browser holds both binary and encoded representations.

Privacy

Text and files are converted locally.

No registrationLocal processingClear output

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Frequently asked questions

Is Base64 encryption?

No. It is a reversible representation of data.

Why is Base64 larger than the original?

Its text representation normally adds roughly one third to the byte length, plus possible padding.