Encode text to Base64 or decode Base64 back to text, instantly and privately.
Base64 Encode and Decode converts text to Base64 and back again. Base64 is a way of writing data using only a small set of plain letters, numbers, and a couple of symbols, so that content can travel safely through systems that only handle basic text. The problem it solves shows up constantly in development, where raw data with odd characters can get mangled in a URL, an email, or a config file, and encoding it to Base64 keeps it intact until the other end decodes it.
You paste your text and choose to encode it into Base64, or paste a Base64 string and decode it back to readable text. The result appears ready to copy. Because the tool runs both directions, you can encode a value, hand it off, and later drop the encoded string back in to confirm it decodes to exactly what you started with.
It helps to understand that Base64 is not encryption and offers no security at all, since anyone can decode it back in a moment, so it should never be used to hide a secret. It also makes data larger, adding roughly a third to the size, which is the tradeoff for making binary or awkward content safe to pass around as text. The padding characters you sometimes see at the end are a normal part of the format, not an error.
Compared with reaching for a command-line tool or a snippet of code, this is quicker for a one-off value and needs nothing installed. When you are encoding files or working inside an application, the built-in functions of your language are the right tool, since this one is aimed at text and small strings you can paste in.
Developers use it to embed small images or fonts directly in CSS and HTML as data, to encode values for tokens and headers, to move JSON or config safely through channels that expect plain text, and to decode a Base64 string someone sent them to see what is inside. It is a daily convenience in web and API work.
Both encoding and decoding happen in your browser, so your text is never uploaded and nothing is stored. There is no account and no cost. Your device's memory is the only real limit, and for the short strings this is built for, it responds instantly.
No. Base64 only rewrites data in a different set of characters and anyone can decode it back instantly, so it provides no security whatsoever. Never use it to protect a password or a secret.
Base64 represents data using a limited character set, which adds roughly a third to the size. That size increase is the normal cost of making content safe to pass through text-only systems.
Those are padding characters that round the output to a required length, and they are a standard part of the format. Their presence does not mean anything is wrong with the encoding.
Decoding assumes the input is valid Base64 text, so a string that is incomplete, altered, or actually encoded binary can come out as gibberish. Check that you pasted the full, unmodified string.
Yes, text with emoji and accented characters encodes and decodes correctly because those characters are represented as data before being converted. Round-tripping them back out returns the same text you put in.
This tool focuses on text you can paste in rather than uploading files. To turn an image into a Base64 data URI, an image-to-Base64 tool is the more direct choice.
No. Both operations run in your browser and nothing is sent to a server, so whatever you paste stays on your device.
Polished Pixels. All tools. About. Contact. Every tool runs in your browser and your files are never uploaded.