Base64 Encode & Decode Online
Base64 Encoder converts text to and from Base64 in an instant. Encode plain text for data URIs, JWTs, HTTP basic auth, email attachments or API tokens, and decode Base64 back to readable text just as easily. The tool handles Unicode and UTF-8 correctly, so emojis and international characters round-trip without corruption. All conversion happens locally in your browser, so nothing is transmitted or stored. A fast, dependable utility for developers and anyone who works with encoded data.
How to use Base64 Encoder
- 1
Enter your text or Base64
Type or paste plain text to encode, or a Base64 string to decode.
- 2
Pick an action
Click Encode to convert text to Base64, or Decode to convert it back.
- 3
Copy the result
Copy the converted output to your clipboard with one click.
Why use this tool
- Encode and decode Base64 in one place
- Correct UTF-8 and Unicode handling
- Works both directions instantly
- Private — text never leaves your browser
- Free, no sign-up, no limit
Frequently asked questions
- What is Base64 used for?
- Base64 encodes binary or text data into ASCII characters so it can travel safely through systems that only handle text — email, JSON, URLs, data URIs and more.
- Is Base64 encryption?
- No. Base64 is an encoding, not encryption. Anyone can decode it, so never use it to protect secrets.
- Does it handle Unicode and emojis?
- Yes. The tool encodes and decodes UTF-8 text correctly, so emojis and international characters are preserved.
- Is my input uploaded anywhere?
- No. Encoding and decoding run entirely in your browser, so your text stays private.
- Can I encode binary files?
- This tool focuses on text. For files, use a dedicated file-to-Base64 utility.
- Is there a length limit?
- There is no set limit — performance depends on your browser and device.
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