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Free Base64 tool

Base64 Encoder & Decoder

Encode text to Base64 or decode it back instantly. Type in the field at the top to see live results, then read the guidance below.

Working field

Pick a mode and enter your text to convert.

Mode

Result

Your converted output shows here as you type.

This tool is best for fast, private Base64 encoding and decoding right in your browser.

Free Base64 Encoder & Decoder Online

Convert text to Base64 and back in real time, with everything running locally in your browser. This tool keeps the workflow simple: input first, supporting content below, and the sidebar on the left for popular and related tools.

Real-time output

See encoded or decoded results the moment you type, with no extra clicks.

Two-way conversion

Switch between encode and decode modes without leaving the page.

Private by design

Everything runs in your browser, so your data never leaves your device.

No setup required

Use it directly in the browser for quick, reliable conversions.

How it works

  1. Choose Encode or Decode at the top of the editor.
  2. Type or paste your text into the input field.
  3. Watch the result panel update instantly as you type.
  4. Copy the result, or reset the form and try another input.

Best practices

  • Pick the right mode before you start typing.
  • Remember that Base64 is encoding, not encryption.
  • Strip stray spaces from Base64 strings before decoding.
  • Keep sensitive data out of shared or public text.
  • Use Base64 to embed small images in HTML or CSS.
  • Copy the result as soon as you have what you need.

Frequently asked questions

Is Base64 encryption secure?

Base64 is an encoding scheme, not encryption. It converts data to a text format for compatibility but does not protect it. For real security, use cryptographic methods or inspect secure tokens with a JWT Decoder.

Can I decode any Base64 string?

Yes. You can decode any valid Base64 string here. If the input is invalid or corrupted, the tool shows a clear error message.

Is my data safe?

Yes. This tool runs entirely in your browser. Your data stays local and never reaches our servers.

Do I need an account or installation?

No. The encoder and decoder work right in your browser with no sign-up, downloads, or setup.

What can I encode or decode?

You can handle plain text, tokens, and short data strings. The tool processes your input instantly as you type.

Why does my output show an error?

When decoding, the input must be a valid Base64 string. Check for stray characters or spaces if you see an error message.

For related encoding work, try the HTML Entities Encoder/Decoder, JWT Decoder & Encoder.