ToolNestFree Online Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to readable text. Our free Base64 converter handles both directions instantly — useful for developers embedding data in URLs, encoding credentials, debugging API payloads, and working with data URIs.
✓ Free forever · ✓ No signup · ✓ Runs in your browser — your data never leaves your device.
How to Use the Base64 Encoder / Decoder
- Enter your text (to encode) or Base64 string (to decode).
- Click 'Encode to Base64' or 'Decode from Base64'.
- The result appears instantly in the output box.
- Copy it with one click.
Why Use Our Base64 Encoder / Decoder?
- Both directions — encode and decode in the same tool.
- Unicode-safe — correctly handles emoji and non-English text.
- Clear errors — invalid Base64 input gets a plain-English message, not silence.
- Private — conversion runs locally; nothing is transmitted.
Frequently Asked Questions
What is Base64?
Base64 is a way to represent binary or text data using only 64 safe ASCII characters — commonly used in data URIs, email attachments, and API tokens.
Is Base64 encryption?
No. Base64 is encoding, not encryption — anyone can decode it. Never use it to 'protect' secrets.
Why did decoding fail?
The input probably isn't valid Base64 (wrong characters, bad padding, or line breaks). The tool will tell you.
Does it support Unicode and emoji?
Yes — text is UTF-8 encoded before conversion, so any language or emoji round-trips correctly.
Is this tool free?
Yes, free and unlimited with no account.