Base64 Encoder & Decoder
Convert any text to Base64 — or decode Base64 back to readable text — instantly, with zero uploads.
What is the Base64 Encoder & Decoder?
Base64 is the internet's way of disguising binary or special text as plain, safe ASCII characters. You'll meet it in data URLs, API tokens, authentication headers, email attachments and configuration files — and developers constantly need to convert text in both directions. The catch: pasting API keys or tokens into a random website to decode them is a genuine security risk.
The MuftTools Base64 Encoder & Decoder solves this by doing everything locally in your browser. Paste your text, get the encoded output instantly — or paste a Base64 string and read the decoded result. Because nothing ever travels over the network, it's safe even for sensitive strings. Unicode text is handled correctly, and invalid input gets a clear error instead of garbage output.
How to use the Base64 Encoder & Decoder
- Paste your text — or a Base64 string — into the input box.
- Choose Encode or Decode.
- The result appears instantly.
- Copy it to your clipboard with one click.
- Rest easy: your data never left your device.
Key features
- Two-way conversion: encode and decode
- Instant results with no waiting
- Correct Unicode (UTF-8) text handling
- One-click copy to clipboard
- Private — safe for tokens, keys and secrets
- Free forever, no account needed
Frequently asked questions
What is Base64 actually used for?
Representing binary or special characters as plain ASCII text — common in data URLs, API authentication tokens, email attachments and embedded file data.
Is it safe to paste sensitive strings here?
Safer than on most sites: all conversion happens locally in your browser, so your text is never transmitted to any server.
Does it handle non-English text?
Yes. Full Unicode (UTF-8) support means Urdu, Arabic, Hindi, emoji and other scripts encode and decode correctly.
What happens if I try to decode invalid Base64?
You'll get a clear error message instead of corrupted output, so mistakes are easy to spot.