Base64 Encode & Decode is a 100% free, browser-based utility that enables you to encode text to base64 or decode base64 to text (utf-8). Unlike traditional cloud converters, all processing executes locally on your device with zero server uploads, delivering immediate results and ironclad data privacy.
About the Base64 Encode & Decode
Base64 represents binary data using 64 printable characters, which makes it safe to embed in JSON, XML, emails, URLs and data URIs. This tool encodes any text to Base64 and decodes Base64 back to readable text.
Unlike the browser's built-in btoa(), it correctly handles UTF-8, so accented letters, non-Latin scripts and emoji round-trip without errors. Enable "URL-safe" to use the base64url alphabet (- and _ instead of + and /, without padding) used in JWTs.
How to use the Base64 Encode & Decode
- Choose Encode or Decode.
- Type or paste your input. The result updates instantly.
- Toggle URL-safe if needed, then copy the output.
Features
- UTF-8 & emoji safe
- URL-safe base64url
- Ignores whitespace when decoding
- Live conversion
Why Choose In-Browser Base64 Encode & Decode vs Cloud Converters?
| Feature | Toolora (In-Browser) | Traditional Cloud Tools |
|---|---|---|
| Data Privacy | 100% Private (Files stay on device) | Uploaded to remote servers |
| File Size Limits | Unlimited (Limited only by your RAM) | Restricted (e.g. 10MB–50MB caps) |
| Processing Speed | Instant (Zero upload/download delay) | Slow upload & queue waiting |
| Ads & Popups | Clean, distraction-free | Heavy banner & interstitial ads |
Frequently asked questions
Is Base64 encryption?
No. Base64 is an encoding, not encryption. Anyone can decode it, so never use it to protect passwords or secrets.
Why is Base64 output longer than the input?
Base64 uses 4 characters for every 3 bytes of data, so encoded output is about 33% larger than the original.
What is the difference between Base64 and base64url?
base64url replaces + with - and / with _ and usually omits the = padding, so the result can be used in URLs and filenames without escaping.