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Base64 Encoder Converter Runs in your browser. No input data is sent to our server.

Paste plain text into the editor, encode it instantly, and copy the Base64 result. This page is useful for APIs, data transport, credentials testing, and quick text encoding tasks.

Base64 output

Paste content and convert it instantly.

This converter runs in your browser so you can reshape structured text, config data, and encoded values without sending working content to a remote processing service.

Encode Text To Base64 Online

Encode text to Base64 online for API credentials, data transport, config values, and developer workflows. Base64 turns arbitrary text into a string of safe ASCII characters — widely used in HTTP Basic Auth headers, JWT construction, data URIs, and anywhere a binary-safe text format is required.

How to use Base64 Encoder Converter

1

Paste content into the text input panel.

2

Run the converter to generate the target format instantly.

3

Copy the result once it looks right.

What this tool helps you do

Paste, convert, and copy results quickly

Useful for APIs, configuration files, and structured text

Sample input is built in for quick testing

Copy the converted output as plain text

Why this helps in text and data workflows

Encoding credentials or API keys as Base64 for an HTTP Basic Auth header.

Encoding a JSON payload for embedding in a URL or config value that doesn't allow raw JSON.

Preparing binary-like data as a safe text string for transmission over a text-only channel.

Encoding test fixture data or token values for use in automated tests.

Common problems and fixes

The Base64 output contains + and / characters that break my URL.

Standard Base64 uses + and /. If you need URL-safe encoding, use the Base64URL Encoder instead — it replaces + with - and / with _ and omits padding.

The encoded value has trailing = signs and I need to remove them.

The = padding is part of the Base64 standard. Some systems require it, others don't. The Base64URL Encoder omits padding by default if that's what you need.

I encoded a string but the receiver can't decode it.

Check that both sides agree on encoding — standard Base64 vs Base64URL, and whether padding is included. Encoding a UTF-8 string vs raw bytes also produces different results.

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Related Guides

What Is Base64 Encoding Used For? When to Use Base64URL Instead of Base64 What Is Base64URL and When Is It Used?

Frequently asked questions

How do I encode text to Base64?

Paste your text into the input box, run the encoder, and copy the Base64 output.

Does this Base64 encoder support UTF-8 text?

Yes. It encodes regular UTF-8 text, including non-ASCII and emoji characters.

What's the difference between Base64 and Base64URL?

Standard Base64 uses + and / as characters and = for padding. Base64URL replaces + with - and / with _ and omits padding, making it safe for use in URLs and JWT headers without further encoding.

Why is the Base64 output longer than the input?

Base64 encodes every 3 bytes of input as 4 characters of output. The encoded result is roughly 33% larger than the original.

Can I use this for encoding images or binary files?

This tool encodes text input. For binary files, you'd need a file-based Base64 encoder.

Is this Base64 encoder free?

Yes. It is free to use in your browser.