Base64 Encoder
Free online Base64 Encoder tool.
About Base64 Encoder
Free online Base64 Encoder tool.
Base64 Encoder converts any plain text, code snippet, or short file content into a Base64 string that can be embedded directly in HTML, CSS, JSON, or email. The tool processes input instantly in your browser, shows the encoded output alongside the original, and lets you copy either with one click. It is useful when you need to inline an image as text, pass data through a field that only accepts letters and numbers, or store a small payload in a URL without special characters escaping wrongly. Base64 Encoder handles line breaks cleanly, supports very long strings, and never sends your data over the network, making it a safe pick for tokens and private snippets.
How to Use Base64 Encoder
- Enter the value you want to convert in the input field.
- Select the source unit and the target unit.
- Read the result instantly — it updates live as you type.
- Copy the output or swap the units to convert in the other direction.
Key Features
- Live two-way conversion — edit either side and both update together.
- Uses standard, precise conversion factors for everyday and technical use.
- Runs entirely in your browser — works offline and sends nothing anywhere.
Frequently Asked Questions
Does the Base64 Encoder send my text to a server?
No. Encoding runs entirely in your browser with client side JavaScript, so the original text and the resulting string never leave your machine. That makes the tool safe for pasting access tokens, personal identifiers, or configuration values that should not travel over the network. You can paste very long input, keep the formatting you need, and copy the result immediately. For decoding, switch the mode and paste the Base64 string back to recover the original text.
Is Base64 Encoder free to use?
Yes. Base64 Encoder is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Base64 Encoder runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Base64 Encoder work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.
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