CONVERTER

Base64 decode

Decode a Base64 string back to text instantly in your browser. Free, no signup, plus tips when decoding fails.

Open the Base64 tool →All free tools

Paste a Base64 string and get the original text back. Decoding always works because Base64 is not encrypted — just re-encoded bytes.

If decoding fails

Invalid Base64 usually means stray whitespace, a truncated string, or Base64URL input (which uses - and _) decoded as standard Base64. Trim the input and confirm the alphabet matches.

Reading the result

If the decoded output looks like random bytes rather than text, the original was binary (an image or an encrypted blob), not a UTF-8 string. That is expected — Base64 carries any bytes, not just text.

Try it now — free, no signup

Use the Base64 tool in your browser. Then, when you need it at scale with an API key and higher limits, grab the full Eveses API.

Open the Base64 tool →Sign up for the full API

FAQ

Why is my decoded text garbled?›
The original was probably binary data, not text. Base64 can carry any bytes; not all decode to readable characters.
Can all Base64 be decoded?›
Yes — it is always reversible with no key.

Related

Base64 encodeEncode text to Base64 instantly in your browser. Free, no signup — plus what Base64 is and when to use it.What is Base64 encoding?Base64 turns binary data into safe ASCII text using 64 characters. Learn what it is, why it is not encryption, and encode or decode text free.How to decode Base64Decode a Base64 string back to its original text or bytes. Free online tool plus the decode one-liner in each language.