Base64 to File
🔒 In your browserDecode Base64 (or a data URI) back into a downloadable file.
Detects the type from a data: URI when present. Decoding happens in your browser — nothing is uploaded.
🔒 Files stay on your device: conversion happens entirely in your browser using the FileReader API — your file is never uploaded to any server, unlike many other online converters.
About the Base64 to File
Got a Base64 string or data URI and need the actual file back? This free Base64-to-file decoder turns Base64 (or a data URI) into a downloadable file, auto-detecting the type where possible — all in your browser, with no upload.
It's the reverse of encoding a file, handy for extracting attachments, images or documents embedded as Base64.
How to decode Base64 to a file
- Paste your Base64 string or a full data URI.
- The file type is detected from the data URI prefix when present.
- Download the decoded file to your device.
When you'd decode Base64 to a file
Base64 is how binary files travel through text-only channels — embedded in JSON, stored in a database column, or pasted into a config. When you need the real file back, this tool decodes the Base64 (or a full data URI) and hands you a download. If the data is a data URI, the correct file type and extension are detected automatically from its prefix.
Frequently asked questions
How do I turn Base64 back into a file?
Paste the Base64 (or data URI) and download the decoded result. If a data URI prefix is present, the correct file type and extension are applied automatically.
Can it decode a data URI?
Yes. Paste a full data:...;base64,... string and it extracts the MIME type and file contents.
Is my data private?
Yes. Decoding happens in your browser and nothing is uploaded.
Can it decode a data URI?
Yes. Paste a full data:...;base64,... string and it extracts the MIME type and contents, so the downloaded file has the right type and extension.
Related searches
Related Developer tools
🔗 Embed this tool on your website — free
Copy this and paste it into your page's HTML. The tool runs in the visitor's browser, just like here. Change height to fit, or add the optional auto-resize snippet below. Add ?theme=dark to the URL for dark mode.
<iframe src="https://toolhq.dev/embed/base64-to-file/" title="Base64 to File — ToolsHub" width="100%" height="520" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" loading="lazy"></iframe>Optional: auto-resize the iframe height
Add this once on the same page so the iframe grows to fit the tool:
<script>
addEventListener("message", function (e) {
if (e.data && e.data.type === "toolshub:resize") {
document.querySelectorAll('iframe[src*="/embed/"]').forEach(function (f) {
if (f.contentWindow === e.source) f.style.height = e.data.height + "px";
});
}
});
</script>