Dev Tools
Base64 Encoder / Decoder
The Base64 Encoder / Decoder converts plain text into Base64-encoded strings and back again, handling UTF-8 characters correctly so accented letters, emoji, and non-Latin scripts survive the round trip. Developers reach for it to inspect API tokens, embed small files as data URIs, or debug encoded values found in logs and configuration files.
All encoding and decoding happens directly in your browser using standard JavaScript, so nothing you type or paste is ever sent to a server or saved anywhere — it's safe to use on API keys, credentials, or other sensitive strings.
How to Use the Base64 Encoder / Decoder
- Open the Base64 Encoder / Decoder tool.
- Paste the text or Base64 string you want to convert.
- Pick Encode or Decode.
- Copy the result to your clipboard.
Frequently Asked Questions
Does this tool handle UTF-8 characters like emoji and accents correctly?
Yes — it encodes and decodes using UTF-8 byte sequences, so special characters, accents, and emoji round-trip correctly instead of turning into garbled text.
Is it safe to decode a Base64-encoded API token or secret here?
Yes — the decoding happens entirely client-side in your browser, so tokens and other sensitive strings are never transmitted anywhere.
Why do I get an error when decoding certain strings?
Invalid Base64 input, like text with characters outside the standard Base64 alphabet or incorrect padding, will fail to decode since it isn't valid Base64.