Base64 Encoder / Decoder
UTF-8-safe Base64 encode and decode
100% Private & In-Browser
Processed locally using client-side JavaScript. Your files and data never touch any server.
Instant & Unlimited
No registration, no waiting queues, and no limits on file conversions or generations.
What is Base64 Encoder / Decoder?
The Base64 Encoder / Decoder converts raw text and data into ASCII-safe Base64 strings and decodes Base64 back into human-readable text. It includes full UTF-8 support for emoji, non-Latin scripts, and clean formatting.
How to use Base64 Encoder / Decoder
Select either Encode or Decode mode.
Paste your plain text or Base64 payload into the input box.
The browser's UTF-8 TextEncoder/TextDecoder safely processes the byte sequences.
Copy your result or download the payload instantly.
- Safe multi-byte UTF-8 encoding (handles emoji, Cyrillic, Chinese, Arabic)
- Instant two-way toggle between encoding and decoding
- One-click clipboard copying
- Encoding binary assets and images into data URIs for embedding in HTML or CSS.
- Debugging API payloads, HTTP authorization headers, and webhooks.
- Decoding obfuscated configuration strings in software development.
Frequently Asked Questions
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