Category: Developer tools
Base64 Encoder & Decoder
Encode UTF-8 text to standard Base64 or decode it back to readable text
Encode UTF-8 text to standard Base64 or decode Base64 back to readable text. Unicode-safe conversion runs locally in your browser.
The result will appear here.
Everything on this page is processed in your browser. Nothing is uploaded.
What this tool does
Use this Base64 encoder and decoder to convert plain text into standard Base64 through UTF-8 bytes, or turn a standard Base64 string back into UTF-8 text. Accents, emoji and non-Latin scripts can round-trip correctly. Base64 is reversible encoding, not encryption, and this text-only tool does not support files, Base64URL or Data URIs. Your input and result stay in the browser tab.
How to use it
- Paste the text you want to encode or the standard Base64 string you want to decode.
- Choose Encode to create Base64 or Decode to recover UTF-8 text.
- Review and copy the result.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- What is Base64?
- Base64 is a binary-to-text encoding that represents bytes with printable characters. It is reversible and does not make data secret.
- How do I encode Unicode text or emoji to Base64?
- Enter the text and choose Encode. The tool converts it to UTF-8 bytes before creating standard Base64, so accents, emoji and non-Latin scripts are supported.
- Is Base64 encryption?
- No. Base64 is reversible encoding, so anyone can decode it. Do not use it to protect passwords, tokens or other secrets.
- Why did Base64 decoding fail or show unreadable characters?
- The browser rejects some strings with invalid characters, length or padding. A valid Base64 value can still contain bytes that are not UTF-8 text, which may appear as replacement characters.
- Is my text or Base64 uploaded?
- No. Encoding, decoding and copying run in your browser tab, so LocalTools does not receive the input or result.