Base64 Decoder
Decode Base64 back to readable text instantly.
Base64
Decoded text
Runs entirely in your browser — nothing here is uploaded anywhere.
How it works
- Paste Base64-encoded text into the input box.
- It's decoded as you type.
- Copy the decoded result.
Need more than a one-off tool?
PDF Go for Mac keeps every tool like this — plus AI chat, summarization, and semantic search across your documents — in one native app, working offline for markup and signing.
Download PDF Go for Mac — free →Frequently asked questions
What if my Base64 is invalid?
You'll see an error — usually caused by missing padding characters or characters outside the Base64 alphabet.