How to Encode & Decode Base64 Online Free

What Base64 is used for

Base64 converts binary data into a text string that can safely travel through systems that only handle text (JSON, XML, email, URLs in some contexts, etc.). Developers constantly encode and decode API payloads, images embedded in CSS/HTML, tokens and configuration values.

### How to encode or decode online 1. Open the free Base64 tool. 2. Paste text or upload a small file. 3. Choose Encode or Decode. 4. Copy the result.

### Common use cases - Embedding small images as data URIs - Putting binary data inside JSON - Handling basic authentication headers - Debugging tokens and payloads - Converting files for systems that reject binary

### Important notes - Base64 increases size by roughly 33 %. - It is encoding, not encryption. Anyone can decode it. - For security use proper encryption or hashing, not Base64.

### Privacy Browser-based tools keep your data on the device. Prefer them when the content is sensitive.

FAQ

Is Base64 encryption? No. It is only an encoding scheme. Anyone can reverse it.

Why does the encoded string look longer? Base64 represents 3 bytes as 4 characters, so size grows by about one third.

Can I encode files? Yes, most tools accept small files or let you paste the binary as text.

Is the online tool safe for secrets? Only if it runs entirely in your browser and does not transmit the data.