Base64 Encoder Decoder
Encode text to Base64 or decode Base64 to text in your browser. Your data never leaves your device. Free and private.
No uploads. No account. Free to use.
Encode or decode Base64 text locally.
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- Files never leave your device
- Runs entirely in your browser
- No signup required
- Free
What is Base64 Encoder Decoder?
Base64 Encoder Decoder converts plain text to Base64 and Base64 back to text using the browser’s built-in functions. Paste your input and get the result instantly. No data is ever uploaded.
Key features
- Text ↔ Base64 conversion
- Uses native btoa / atob (with Unicode support)
- Instant
- 100% client-side
- No account or limits
- Safe for secrets and tokens
How to use it
- Open the tool.
- Paste text or Base64 string.
- Choose Encode or Decode.
- Copy the output. Processing stays in the tab.
When to use it
Use it for encoding API keys, testing Base64 payloads, embedding small data, or decoding tokens without sending them to a third party.
In this family
Base64 & encoding — related tools in the same cluster.
Frequently asked questions
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