Data Conversion

Base64 Tool

Encode and decode Base64 text locally for quick debugging and data conversion.

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This tool runs locally in your browser. Your input is not sent to a backend or paid API.

Base64 Tool

Encode and decode Base64 text locally with Unicode support.

How to use

How to use Base64 Tool

Follow this workflow to complete the task locally without leaving the page.

  1. 1

    Paste text or a Base64 value into the input area.

  2. 2

    Choose Encode or Decode depending on the conversion you need.

  3. 3

    Review validation messages if the Base64 input is invalid.

  4. 4

    Copy the output for API tests, scripts, or documentation.

Examples

Example inputs

Use these examples to understand common workflows and expected input formats.

Encode plain text

Convert readable text into Base64 for headers, demos, or fixture values.

BuildOnLabs developer tools

Decode Base64

Decode a Base64 string while debugging payloads or API examples.

QnVpbGRPbkxhYnMgZGV2ZWxvcGVyIHRvb2xz

FAQ

Base64 Tool FAQ

Answers to common questions about behavior, privacy, and practical usage.

Does Base64 encryption protect secrets?

No. Base64 is encoding, not encryption. Anyone can decode Base64 text, so do not treat it as a security control.

Does this tool support Unicode text?

Yes. The encoder and decoder use browser text encoding APIs so Unicode text can be converted safely.

Can I decode invalid Base64?

Invalid Base64 input shows an error. Fix the input or remove unsupported characters before decoding.

Is my input uploaded?

No. Encoding and decoding run locally in your browser without a backend request.