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Base64 Encoder / Decoder

Encode text to Base64 or decode it back, with URL-safe support.

1

Input

2

Settings

3

Run

4

Results

Results will appear here once you run the tool.

About Base64 Encoder / Decoder

Encode text to Base64 or decode it back, with URL-safe support. Paste or type your text into Base64 Encoder / Decoder, adjust the settings, and the result appears below.

Your files stay on your device. ZyncTools has no upload step: the file is read in your browser, processed there, and handed straight back to you. There is no account, no watermark and no size cap beyond what your own device can hold.

Settings. Base64 Encoder / Decoder gives you control over direction, url-safe alphabet ( - and _ instead of + and / ), strip = padding and wrap lines at.

Also known as: base64, encode, decode, btoa, atob.

How to use Base64 Encoder / Decoder

  1. Add your input. Paste or type your text into the input box. You can also load a text file from your device.
  2. Choose your settings. Adjust direction, url-safe alphabet ( - and _ instead of + and / ), strip = padding and the other 1 settings to suit what you need.
  3. Run the tool. The result updates as you type. Press Run to refresh it at any point.
  4. Save the result. Copy the output, or press Download to save it. Nothing is kept once you close the tab.

Frequently asked questions

Are my files uploaded when I use Base64 Encoder / Decoder?

No. Base64 Encoder / Decoder runs entirely inside your browser. Your text is read locally, processed on your own device, and handed straight back to you. You can confirm this yourself: open your browser's developer tools, watch the Network tab, and run the tool — no request carries your data anywhere.

Is Base64 Encoder / Decoder free?

Yes, completely. No account, no sign-up, no watermark on your output, and no cap on how many times you can use it. The project is open source under the AGPL licence.

Does Base64 Encoder / Decoder work offline?

Mostly. The site caches itself after your first visit, so it keeps working without a connection. Tools that need a specialised library — PDF editing, OCR, QR codes, MP3 encoding — need a connection the first time you run them, then that library is cached too.

Related converters tools

Image to Base64 / Data URI Turn an image into a Base64 data URI for CSS, HTML or JSON. URL Encoder / Decoder Percent-encode text for URLs, or decode an encoded string. HTML Entity Encoder / Decoder Escape HTML special characters, or turn entities back into text. Number Base Converter Convert numbers between binary, octal, decimal, hex and any base up to 36. Text ⇄ Binary / Hex Convert text to binary, hexadecimal or decimal byte values, and back. Colour Converter Convert a colour between HEX, RGB, HSL, CMYK and named values.