Is Base64 Encoder & Decoder free to use?

Yes. Base64 Encoder & Decoder is free, has no usage cap and does not require an account. There is no paid tier that unlocks extra output.

Does my data get uploaded to a server?

No. The tool is a JavaScript function that runs inside your browser tab. Nothing you paste or drop in is transmitted, logged or stored by us.

Do I need to create an account?

No account, no email address and no sign-in. Open the page and start working.

Does it work on a phone or tablet?

Yes. The interface is responsive and works in mobile Chrome, Safari, Edge, Firefox and Samsung Internet. You can also install Toolspea as an app from the browser menu.

Can I use the output commercially?

Yes. You keep every right you already had over the input, and we claim nothing over the output.

Is Base64 encryption?

No. It is a reversible representation with no key. Anything encoded can be decoded by anyone who has the string, so it protects nothing on its own.

Why is my decoded text garbled?

Usually the string was truncated, contains stray whitespace or line breaks, or was encoded with the URL-safe alphabet while being decoded with the standard one. Toggle the URL-safe switch and retry.

What are the = characters at the end?

Padding. Base64 works in three-byte groups; when the input is not a multiple of three, one or two = characters pad the final group.

Does it handle emoji and non-English text?

Yes. Input is encoded as UTF-8 before conversion, so any Unicode character round-trips accurately.

Developer tools

Base64 Encoder & Decoder

Convert text to Base64 and back, with UTF-8 handled correctly.

Input

Result

Options

Direction

URL-safe alphabet (- and _)

Everything above is processed in this browser tab. Your input is never sent to a server.

What is Base64 Encoder & Decoder?

Base64 Encoder & Decoder converts text to Base64 and decodes Base64 back to text. Base64 represents binary data using 64 ASCII characters so it can travel safely through systems that expect text, such as HTTP headers, JSON fields, data URIs and email attachments.

How to use it

1Paste the text or Base64 string.
2Choose encode or decode.
3Enable the URL-safe alphabet if the value will appear in a query string.
4Copy the converted value.

Features

Correct UTF-8 handling, so emoji and non-Latin scripts survive a round trip
URL-safe variant replacing + and / with - and _
Clear error when the input is not valid Base64

When people use it

Reading an encoded log entry

Payloads are often logged encoded. Decoding locally shows what was actually sent without piping the string through a shell command.

Building Basic auth headers

Basic authentication expects username:password encoded as Base64. Encode it here when testing an endpoint by hand.

Known limits

Base64 is an encoding, not encryption. Anyone can decode it; never use it to protect a secret.
Encoding grows data by roughly 33 percent.