Contact Us

We read everything that arrives here. Base64Deco is a small project, so a message that says which tool you were using and what you expected gets a useful answer fastest.

The tool behind this page is Base64Deco, a Base64 encoder and decoder. Questions usually involve encoding a token for an Authorization header or a number that came out differently than expected, and both are useful to hear about.

Email

Our inbox is support@base64deco.com. We try to answer within two business days.

Include this

• A link to the page, or the name of the calculator you used.
• A rough version of the text or Base64 string you paste — we only need enough of it to redo the sum.
• The output you received against the output you expected.
• Device and browser, for anything that looked wrong on screen.

If your question is about embedding a data URI in a stylesheet, say so in the first line — it helps us find the right answer for Base64Deco faster.

Reporting an error in a result

For a developer tool, accuracy is the whole point. Because the Base64Deco tool works the way described on its own page — it encodes the bytes of the string in UTF-8 first and then groups them into 6-bit chunks for the Base64 alphabet, which is why non-ASCII text survives intact instead of becoming mojibake — a wrong answer almost always traces back to one assumption, an input that does not fit the model, or a rounding edge case. If you think you have found one, tell us the value you expected and which tool you used, and we will check it against the method.

How we handle what you send

Your message serves only the one purpose of a reply. It goes on no list and to no third party. Full details live in the privacy policy.