Base64 Encode & Decode Online Free

You have a strange-looking string ending in "==" and you want to know what it says. Or you need to turn text into Base64 for an API, an email header or a config file. The PDFFlowState Base64 Encode and Decode tool is a free Base64 encoder and decoder that works in your browser, with no account.

Open Base64 Encode and Decode

What does it do?

Base64 Encode and Decode encodes text to Base64 or decodes it back. It covers the usual searches: Base64 encode, Base64 decode, Base64 decode online, Base64 encoding, Base64 translator and Base64 converter.

What is Base64?

Base64 is a way to represent data using only letters, numbers and a few symbols (A-Z, a-z, 0-9, + and /). It is used to carry text or binary data through systems that only handle plain text, such as email, URLs, JSON and HTML data.

Important: Base64 is an encoding, not encryption. Anyone can decode it, so it is not a way to hide passwords or secrets. Searches such as Base64 decrypt really mean decode, and there is no key involved.

How to encode text to Base64

1. Open the tool. Go to Base64 Encode and Decode. It works on phone and desktop.
2. Choose Encode.
3. Paste your text.
4. Copy the Base64 output.

How to decode Base64

1. Open the tool and choose Decode.
2. Paste the Base64 string.
3. Read the decoded text and copy it if you need it.

No sign-up is needed, so it works as a free decode Base64 string and encoding tool.

When is it useful?

• Reading API and token data that arrives Base64-encoded.
• Debugging emails, headers and config values.
• Embedding small data in JSON, HTML or CSS.
• Basic encoding for transport, not for security.

Related tools

• If the decoded text is JSON, tidy it with JSON Formatter.
• Need a fingerprint of some text? Use Hash Generator.
• Need a unique ID? Use UUID Generator.

Frequently asked questions

Is this Base64 tool free? Yes. It is free and needs no sign-up.

Is Base64 secure? No. Base64 is not encryption, so do not use it to protect sensitive data.

Can I decode Base64 with a key? Plain Base64 does not use a key. If a string needs a key, it was encrypted with something else.

Can I decode Base64 to JSON? Decode the string first, then format the result with JSON Formatter.

Can I encode files or images to Base64? This tool is for text.

Encode or decode now

Try the free Base64 tool or browse all the developer tools on PDFFlowState.