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ToolSuite
File & Archive Tools

File to Base64

Encode any file as Base64 or a data URI.

or drag it here

Any file · up to 12 MB

Processed in your browser

Fill in the form and press “Encode file” to see the result here.

How to use it

  1. 1Select your file, or drag and drop it onto the upload area.
  2. 2Adjust the options if you need something other than the defaults.
  3. 3Press the button. Everything happens on your device.
  4. 4Download the result.

About the File to Base64

Base64 turns arbitrary bytes into text that survives JSON, XML, email and URLs. The cost is about 33% extra size.

The limit here is 12 MB, because the encoded result has to be held in memory as a string - roughly four characters for every three bytes.

Questions people ask

Is your file uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your file never leaves your device. You can confirm it by opening your browser's network panel while the tool runs, or by disconnecting from the internet after the page has loaded.

Is it free, and do I need an account?

Yes, it is free, and there is no account, no sign-up and no watermark on the result. The project is funded by optional donations.