Developer tool · Free · No sign-up

Base64 Encoder & Viewer

Encode, decode and preview Base64 text, data URIs and images.

Text input

Base64

SGVsbG8sIEZ1c2lvbiBUcmFpbCBTb2x1dGlvbnMhIPCfkYs=

About this tool

This free Base64 viewer encodes and decodes Base64 in your browser. Convert plain text to Base64 and back with full Unicode (UTF-8) support, decode data URIs, preview Base64-encoded images, and encode any file to a Base64 string or data URI. It's perfect for debugging tokens, inspecting data URIs, and embedding small assets — and nothing you paste ever leaves your device.

Key features

Two-way conversion

Encode text to Base64 and decode Base64 back to text instantly.

Image & data-URI preview

Detects image data URIs and renders a live preview.

File to Base64

Drop a file to get its Base64 string or full data URI.

How to use it

1Choose Encode or Decode mode.
2Paste your text or Base64 string, or drop a file.
3See the converted result update instantly.
4If the input is a Base64 image or data URI, preview it inline.
5Copy the result with one click.

Common use cases

Inspecting JWT and API tokens.
Decoding a data URI to see the underlying content.
Embedding a small image as Base64 in CSS or HTML.

Frequently asked questions

Does it support Unicode and emoji?

Yes. Encoding and decoding are UTF-8 aware, so accented characters and emoji round-trip correctly.

Can it preview Base64 images?

Yes. If your input is an image data URI (or you choose an image MIME type), the decoded image is shown inline.

Is anything uploaded?

No. All encoding and decoding happens locally in your browser.

Private and free. Most of our tools run entirely in your browser, so the data you enter isn't uploaded or stored. There's no sign-up, and there never will be — they're built by the Fusion Trail Solutions team to be genuinely useful.