Base64 Encode / Decode
Encode or decode UTF-8 text with standard or URL-safe Base64.
Runs in your browser: data never leaves your device. Free, no sign-up. Also known as: base64, b64, atob, btoa, base64url.
How to use Base64 Encode / Decode
- Paste your input, open a file, or press Sample to see an example.
- Pick a mode or adjust the options; results update instantly.
- Use Copy or Download to take the result with you.
Frequently asked questions
- What does the Base64 Encode / Decode do?
- Encode or decode UTF-8 text with standard or URL-safe Base64.
- Is the Base64 Encode / Decode free?
- Yes. It is completely free, with no sign-up, no watermark and no usage limits.
- Is my data safe?
- Yes. This tool runs entirely in your web browser. Your text and files are never uploaded to a server, stored or logged.
- Does it work on mobile?
- Yes. It works in any modern browser on Windows, macOS, Linux, Android and iOS, with nothing to install.
- What other encode & decode tools are there?
- Runeforge has 14 encode & decode tools in Glyph Hall, plus 91 more tools across other categories.
More from Glyph Hall
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Turn any file into Base64, or paste Base64 to auto-detect and preview the file (ZIP, PDF, Word, image, audio, video) and download it.
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Escape or unescape HTML special characters.
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- Text ⇄ Hex
Convert text to hexadecimal bytes and back.
- Text ⇄ Binary
Convert text to binary octets and back.