What this tool does
The Base64 encoder is useful for quick string checks, API parameters, small data fragments, and technical tasks.
How to use
- Paste text or a Base64 string.
- Choose encoding or decoding.
- Copy the result.
What Base64 is
Base64 represents bytes using printable text characters. It appears in APIs, JSON fields, data URLs, email headers, tokens, and logs when binary data or Unicode text must pass through a text-only channel.
Base64 is not encryption. Anyone with a decoder can recover the original content, so treat an encoded secret as a secret. Do not publish API tokens, passwords, private keys, or personal data just because they look unreadable.
Text, UTF-8, and examples
The tool encodes and decodes text through UTF-8, so it works with Cyrillic, accents, Arabic, Vietnamese, and emoji. It is useful for checking a payload, comparing an API response, or preparing a small snippet for a manual test.
For example, hello becomes aGVsbG8=. When decoding, the input must be valid Base64; extra characters, broken padding, or truncated data can produce an error or an incomplete result.
Limits and privacy
Base64 usually increases size by about one third, so it is not a compression format. For large files, build artifacts, or streaming data, use a dedicated workflow and keep this converter for short strings and quick diagnostics.
All operations run in the browser. Text is not sent to All Tools servers, but it may remain in your clipboard or tab history, so avoid pasting real credentials on a shared device.
If you need to transmit confidential data, think about encryption, token lifetime, and the transfer channel first. Base64 can be reversed without a key, so it is a compatibility format, not protection.