Developer
Base64 Encode & Decode
Encode or decode Base64 locally with UTF-8 safety. Processing stays on your device — no upload, no account.
How to use Base64 Encode & Decode
- Paste plain text or Base64.
- Choose Encode or Decode.
- Copy the result.
Why use this free base64 encode tool?
- All processing happens locally in your browser. Your files are never uploaded to a server.
- UTF-8 safe encode/decode.
- One-click copy.
- No account required.
Technical details
Uses TextEncoder/TextDecoder with btoa/atob so non-ASCII characters round-trip correctly.
Base64 Encode & Decode FAQ
Is text uploaded?
No. All processing happens locally in your browser. Your files are never uploaded to a server.
URL-safe Base64?
This tool uses standard Base64 (+/). Convert -/_ variants before decoding if needed.
Images?
For image data URIs use Image to Base64 / Base64 to Image tools.
Invalid Base64?
Decode will show an error if padding or alphabet is wrong.
Related free converters
More private browser tools people use with base64 encode.