Question 1

What is Base64 encoding?

Accepted Answer

Base64 is a binary-to-text encoding scheme that converts binary data into a string of ASCII characters. It is commonly used to embed images in HTML/CSS, transmit binary data in JSON or XML, and encode email attachments.

Question 2

What is URL-safe Base64?

Accepted Answer

URL-safe Base64 replaces the '+' and '/' characters with '-' and '_' respectively, and removes trailing '=' padding. This makes the encoded string safe to use in URLs and filenames without additional encoding.

Question 3

Can I encode files to Base64?

Accepted Answer

Yes, QTool.io's Base64 tool supports any file type. Simply drag and drop a file or click to browse. Images will also show a preview. The entire process happens in your browser — no files are uploaded to any server.

Question 4

Is QTool.io's Base64 encoder free?

Accepted Answer

Yes, it is completely free with no signup, no limits, and no ads. It supports Unicode text, binary files, URL-safe mode, automatic Base64 detection, image preview for decoded images, and one-click copy.

Base64 Encoder / Decoder

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QTool.io on GitHub