What is the Base64 Decoder?
Decode Base64 back to text. The Base64 Decoder is a free online tool that works instantly in your browser — no installation, no signup and nothing to upload. It sits alongside other Encode / Decode tools on DevNibble such as Base64 Encoder, URL Encoder, URL Decoder.
How to use the Base64 Decoder
- Paste the encoded input.
- The decoded output appears instantly.
- Copy the result.
Features
- Runs 100% in your browser — your data is never uploaded or stored.
- Free forever, with no account, no ads and no tracking.
- Copy or download your result in one click.
- Fast and responsive on desktop, tablet and mobile.
Frequently asked questions
How do I decode Base64?
Paste your Base64 string and the decoded text appears instantly, decoded as UTF-8.
Is my data uploaded?
No, decoding happens entirely in your browser.