Base64 Decoder
Decode Base64 text or files back to their original content, with download support.
About Base64 Decoder
Decode Base64 text or files back to their original content, with download support.
Base64 Decoder turns encoded strings and uploaded files back into whatever they were hiding, whether that is plain text, JSON, an image path or a chunk of HTML. Paste the encoded payload and the decoded output appears beside it in real time, with a character count, a validity warning if the padding is wrong and a clear note when the data is not valid Base64 at all. You can also drop a file, decode it and download the result with the original extension restored. Options let you choose URL safe decoding, ignore line breaks and toggle word wrapping for long payloads, which matters when you are inspecting data URIs or API responses. Developers use it to inspect tokens and configuration blobs, students to understand encoding, and support staff to read pasted logs. Base64 Decoder is free, offline and never uploads your content.
How to Use Base64 Decoder
- Enter or paste the text, data or value you want to encode or decode.
- Pick the format or mode from the available options.
- The output updates instantly.
- Copy the result with one click.
Key Features
- Supports the standard formats used across the web.
- Instant, local processing — no round trip to a server.
- Copy-ready output you can paste straight into your code or document.
Frequently Asked Questions
Can the Base64 Decoder handle an uploaded file and let me download it?
Yes. Drop a text file or paste a long encoded string and the decoded content appears immediately, with the original extension preserved when you download it. The tool warns about bad padding or invalid characters instead of producing broken output, offers URL safe mode for tokens, can ignore line breaks and toggle word wrap, and copies everything to the clipboard with one click. Files are processed locally and never leave the device.
Is Base64 Decoder free to use?
Yes. Base64 Decoder is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Base64 Decoder runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Base64 Decoder work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.