100% Free, Private, In-Browser Tool
No uploads. No accounts. No limits. Your files never leave your device.
Image & File to Base64
Convert images or any other file types into Base64 encoded strings locally. Ideal for embedding assets directly in HTML, CSS, or JSON.
File limit: 10MB. Encodings occur entirely on your device.. Max file size is 10MB.
Drag & drop any file here, or click to browse
File limit: 10MB. Encodings occur entirely on your device.
Max file size: 10MB
Base64 Encodings
Upload a file to generate data URLs, raw Base64, and embed codes.
KNOWLEDGE BASE
Frequently Asked Questions
Everything you need to know about processing files securely in your browser
What is Base64 encoding and why use it?
Base64 converts binary data (like images or files) into an ASCII string representation. This allows you to embed files directly inside HTML, CSS, or JSON documents, reducing the number of HTTP requests a web page has to make.
How does this offline Base64 converter work?
It reads your file locally using the `FileReader` API and converts it to a base-64 encoded string format on your device.
Is my file uploaded to a server for encoding?
No. All encoding is performed client-side on your device. Files never leave your web browser, ensuring total privacy.
Does Base64 make the file size larger?
Yes, Base64 encoding adds about 33% overhead to the file size compared to the raw binary file. Therefore, it is best used for small icons, fonts, and scripts, rather than large images or videos.