Base64 Converter
Convert text and images to Base64 or decode Base64 strings instantly using a fast browser-based Base64 converter.
Features
- Text to Base64 Encoding: Safely encode plain text strings into Base64 format for secure data transmission.
- Base64 to Text Decoding: Instantly reverse Base64 strings back into readable plain text.
- Image Base64 Converter: Upload any image (PNG, JPG, SVG, WebP) to generate a Base64 Data URL string that you can embed directly into HTML or CSS.
- Browser-Based Processing: Your data never leaves your device. This online Base64 encoder runs 100% locally.
- Developer Friendly: Includes 1-click copy and download functionality, perfect for integrating with our JSON Formatter or JWT Decoder.
How it works
Base64 is an encoding scheme used to represent binary data in an ASCII string format. This is commonly used in web development to embed images directly into CSS files or to securely transmit data across APIs.
Simply select your desired operation using the tabs above. Type or paste your input into the left panel, and the Base64 Converter will automatically generate the corresponding output in the right panel. For images, drag and drop a file to instantly receive the Base64 Data URL string.
Frequently Asked Questions
Everything you need to know about DevToolkit.
What is a Base64 Encoder used for?
A Base64 encoder translates binary data or plain text into a string of ASCII characters. It's heavily used in web development to embed small images directly into HTML/CSS (saving HTTP requests), or to encode basic authentication credentials.
Is this Base64 Converter safe for sensitive data?
Yes! Unlike many online Base64 converters that send your payloads to a backend server, DevToolkit processes everything locally in your browser using JavaScript's native btoa() and atob() functions.
Why does my Base64 decode output look like random characters?
If you try to decode a Base64 string that originally contained an image or compiled binary file into plain text, it will look like gibberish. Base64 simply encodes bytes; it doesn't know what those bytes represent.