Base64 Encoder / Decoder
Encode text to Base64 and decode Base64 back to UTF-8 text with validation.
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How to use the Base64 Encoder / Decoder
- Open the Base64 Encoder / Decoder.
- Enter your input in the fields provided - results update as you type where practical.
- Use Copy or Download to take the result with you, or Reset to start again.
How it works
Uses a UTF-8 safe conversion (TextEncoder / atob) so emoji and non-English text round-trip correctly.
Privacy note: this tool runs locally in your browser. Your input is not uploaded, stored in analytics, or placed in the page URL.
Frequently asked questions
Is the Base64 Encoder / Decoder free?
Yes. It is completely free, needs no account, and runs in your browser.
Is my data uploaded when I use the Base64 Encoder / Decoder?
No. Processing happens locally on your device. We do not upload your inputs, files or generated passwords.
How does the Base64 Encoder / Decoder work?
Uses a UTF-8 safe conversion (TextEncoder / atob) so emoji and non-English text round-trip correctly.