File to Base64 Encoder
Use File to Base64 Encoder, review the result, and keep the original until the output is checked.
Base64 Output
How to use File to Base64 Encoder
- Choose Local File and Select File, or switch to the From URL tab, enter the address and press Fetch File.
- Set Output Format - Plain Base64, Data URI, JSON or XML - according to where the string is going.
- Pick Line Breaks: No line breaks for a data field, Every 64 or Every 76 characters (RFC) for formats that expect wrapped text.
- Copy the string, or Download it as <name>.b64, .json, .xml or <name>_datauri.txt.
What File to Base64 Encoder actually does to your file
The URL tab makes an outbound request from your browser to the address you type, and a server that has not opted into cross-origin reads fails with an HTTP error rather than a partial result; anything selected from disk never leaves the machine. The result is about 4/3 the size of the file, so a stylesheet or JSON field carrying a megabyte of text is the usual warning sign that the file should have stayed a file.
File to Base64 Encoder FAQ
What does File to Base64 Encoder do?
Convert your files to Base64 in seconds with our simple, free online tool. Works with local files or URLs without uploading.
Which files work with File to Base64 Encoder?
It takes any file and returns Base64 text. The exact types and per-file limit are shown beside the controls.
Is Base64 a way to protect data?
No. Base64 is reversible by anyone who has the text and adds about a third to the size. Treat it as an encoding, not as encryption or compression.
Will my original file be changed?
No. You paste text or open a file to read it, the result appears in the other pane, and only what you copy or download leaves the page.
How is my file processed?
It is not uploaded. The processing is done locally by the encoder bundled with this page, so the practical ceiling is your device's memory and the limit shown beside the uploader - no queue, no account, no copy on a server. The one exception is From URL: paste an address there and your browser fetches that page directly, subject to its own access rules.
Is the File to Base64 Encoder free?
Yes. The File to Base64 Encoder is free with no trial limit, subscription, or watermark on downloads. You can use it for personal and commercial projects without creating an account.