Base64 Encoder / Decoder
Encode text to Base64 or Base64URL and decode it back. Convert Base64 <-> Base64URL, handle padding, and copy results instantly. Runs locally.
Your data stays on your device. Nothing is uploaded.
How to Use the Base64 Encoder Decoder
1. Upload or paste
Enter or paste your input (text, token, JSON or options) into the tool.
2. Convert
Adjust settings if needed, then run the action to generate the result.
3. Download or copy
Copy the output or download it. Processing happens locally in your browser.
Features
Encode and decode
Switch between encoding text to Base64 and decoding Base64 back to text.
Base64URL support
Work with URL-safe Base64, using - and _ with no padding, for web tokens and URLs.
Live preview
The result updates as you type, and character counts are shown for both input and output.
One-click copy
Copy any result straight to the clipboard with a single click.
Runs locally
Everything is processed in your browser. Nothing is uploaded.
Free forever
No account or limits, for both individuals and teams.
FAQ: Frequently Asked Questions
Base64URL replaces + and / with - and _, and drops the = padding, making the output safe for URLs and filenames.
Yes, the Base64 encoder and decoder is completely free and works entirely in your browser.
No. All encoding and decoding happens locally on your device.
Yes, choose the Base64URL option to decode URL-safe tokens such as JWTs.