Base64 Decoder
Paste a Base64 string and turn it back into readable text in seconds. Fixpio’s Base64 decoder runs entirely in your browser, handles UTF-8 correctly, including accented letters and emoji, and never uploads what you paste. No sign-up, no install, just the original text back.
Decode Base64
Paste a Base64 string and read the text underneath it.
Why developers keep a Base64 decoder open
Three everyday jobs this page handles without a terminal or an upload.
Debug payloads in seconds
When an API returns an encoded field, paste it here and read the original JSON, text or header value straight away — no command line, no project to open.
Private by design, not by promise
Most online converters receive your string on their server. This one cannot: the decoding runs in your browser, so a token, a Basic Auth value or a line from a private config file stays on your machine.
Any language, not just ASCII
Because the decoded bytes are read as UTF-8, a name with accents, a sentence in Arabic or Chinese, or a line with emoji comes back intact, where a plain ASCII-only tool would fail or garble it.
About this converter
Most people reach for a Base64 decoder in the middle of another job: an API that returned an unreadable field, an email header they need to inspect, or a value in a config file that turns out to be encoded. This page is built for that moment. Paste the string, press Decode Base64, and read the original text straight away — with no account to create, no program to install, and no upload to wait for.
Underneath, decoding reverses the Base64 process exactly. The string is first read as Base64 characters, turned back into bytes, and then read as UTF-8 text, so accented letters, non-Latin scripts and emoji come back intact. That also explains the warning on this page: Base64 changes how data is written, not who can read it. Anyone with a decoder can reverse it in seconds, so never treat an encoded string as a protected one, and never paste a secret anywhere you would not paste the plain text itself.
Frequently asked questions
Straight answers about decoding, privacy and what Base64 can and cannot do.
How do I decode a Base64 string on this page?
Paste the Base64 string into the Input box and press Decode Base64. The original readable text appears in the Output box, ready to copy. If the box is empty, the page will remind you to paste a string first.
Is Base64 encryption? Does encoding a string keep it secret?
No, on both counts. Base64 is encoding, not encryption: it uses no key and no password, and anyone who sees a Base64 string can decode it in seconds with a tool like this one. It changes how data is written so it can travel through text-only systems — it offers no security at all. Never use Base64 to hide a password, an API key, a token or any other secret; if something needs protecting, it needs real encryption, not encoding.
What is Base64 used for?
It is used wherever data has to travel as plain text. Common cases include carrying binary or structured data inside JSON and API payloads, sending attachments in email, embedding small images or files in HTML and CSS as data URIs, building HTTP Basic Auth headers, and debugging — pasting an encoded token, header or log value into a decoder to read what it actually contains.
Is it safe to paste a token or config string into this tool?
Your pasted text is processed entirely in your own browser and is never sent to a server, stored by us or seen by anyone else — when you close the tab, nothing of it remains with us, because it never left your device. That is the right model for tokens, headers and config strings. Keep the separate warning in mind, though: the Base64 result itself is not protected, so do not share an encoded secret as if it were hidden.
Does this decoder handle non-English text and emoji?
Yes. Decoding turns the Base64 back into bytes, and those bytes are read as UTF-8 text using TextDecoder. Accented characters, non-Latin scripts and emoji therefore come back intact, instead of failing the way they do with tools that only handle plain ASCII.
Why did my Base64 decode fail, or come out as gibberish?
Usually one of three reasons. The input was not valid Base64 — it contains characters outside the Base64 alphabet, or characters were lost when it was copied. The string uses the URL-safe variant, which replaces plus and slash with hyphen and underscore and often drops the padding; this tool works with standard Base64, so swap those characters back first. Or the Base64 holds binary data, such as an image, rather than UTF-8 text — decoding it correctly still will not produce readable text in the Output box.