DataHub Tools Base64 Encoder Decoder

Base64 Encoder and Decoder

Local-first

Encode text to Base64 or decode Base64 into readable UTF-8 text locally in your browser.

What is Base64 Encoder Decoder?

Encode text to Base64 or decode Base64 into readable UTF-8 text locally in your browser.

  • Encode UTF-8 text to Base64
  • Decode Base64 back to readable text
  • Handle Unicode text locally

How to use it

  1. Enter UTF-8 text and choose Encode, or paste standard Base64 and choose Decode.
  2. Remove surrounding quotes or data-URL prefixes before decoding.
  3. Check padding and character set when input comes from another protocol.
  4. Copy the result only after confirming the decoded text matches the original bytes.

Quick example

Example input

DataHub 数据

Expected output

RGF0YUh1YiDmlbDmja4=

This page uses standard Base64 for UTF-8 text, not Base64URL. Base64 is encoding, not encryption.

Best use cases

  • Encode small UTF-8 text fragments for APIs and configuration.
  • Decode Base64 text while debugging headers, payloads, or imported data.
  • Compare standard Base64 output before moving data between systems.

Reference standards and behavior

RFC 4648 defines the standard and URL-safe alphabets. This tool uses the standard alphabet with UTF-8 text and does not add MIME line wrapping.

Sources checked July 24, 2026. Standards can change; review the source pages before formal integration.

Notes

  • The tool processes text locally and does not upload the input.
  • Binary files and data URLs are outside this text-focused workflow.
  • Do not use Base64 to protect passwords, tokens, or confidential data.

FAQ

Is this Base64URL?

No. The page uses the standard RFC 4648 alphabet with +, /, and optional = padding.

Can it encode Unicode text?

Yes. Text is converted to UTF-8 bytes before Base64 encoding.

Can it encode files?

No. This workflow is for text, not binary files or complete data URLs.

Why can decoding fail?

The input may use Base64URL, contain a data-URL prefix, or have invalid characters or padding.

Does Base64 protect secrets?

No. Base64 is reversible encoding, not encryption or hashing.

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