How to Encode and decode Base64

Encode and decode Base64 text and files entirely in the browser. Generate data URIs, handle UTF-8, drag-and-drop files. No data leaves your browser.

4 min read Base64 Encoder Free, no signup required

Quick start

Base64 Encoder — Encode and decode Base64 text and files entirely in the browser.

Get started in under two minutes:

  1. Select the Encode, Decode, or File tab
  2. Paste your text or upload your file
  3. View the result instantly
  4. Copy the output
Open Base64 Encoder

Step-by-step instructions

Follow these steps to get the best results from Base64 Encoder:

1

Select the Encode, Decode, or File tab

At the top of the tool, click the tab for what you want to do: Encode converts plain text to Base64, Decode converts a Base64 string back to readable text, File encodes an entire file.

Tip: Start with the Encode tab to verify the tool is working — paste any short text and confirm the output looks like a Base64 string.
2

Paste your text or upload your file

In Encode mode, type or paste your text into the "Paste text to encode" textarea. In Decode mode, paste your Base64 string into the "Paste Base64 string to decode" textarea. In File mode, drag and drop a file onto the upload zone or click to browse.

Tip: Files up to 5 MB are supported on the free plan.
3

View the result instantly

The encoded or decoded output appears in the result field below as you type. No button press is required — the tool updates in real time as you modify your input.

Tip: If you see garbled output in Decode mode, check that the Base64 string has no extra spaces or line breaks.
4

Copy the output

Click the Copy button beneath the output field to copy the result to your clipboard. You can then paste it directly into your code, API request, or wherever you need it.

Tip: Use the File tab to generate a complete Base64 data URI you can paste directly into an HTML src attribute or CSS background-image value.
Open Base64 Encoder

Frequently asked questions

Are my data uploaded to a server?

No. Base64 Encoder processes everything locally in your browser using JavaScript. Your data never leave your device, making it safe for confidential or sensitive content.

Is Base64 Encoder free to use?

Yes — Base64 Encoder is completely free with no account or signup required. All core features are available immediately.

Does Base64 Encoder work on mobile devices?

Yes — Base64 Encoder works on smartphones and tablets through any modern mobile browser. The interface adapts to smaller screens automatically.

Ready to encode and decode Base64?

Base64 Encoder is free to use. No account or signup required.

Open Base64 Encoder