base64baboon
100% Local

Base64 to File

100% local. No uploads. No storage.

Runs in your browser Your data stays on your device No tracking
LOCAL FILE PROCESSING

File conversion

Files never leave your device.

Files over 25 MiB may use significant browser memory. Maximum: 64 MiB per file.

Advanced options

Options apply to encoding text and files. Decoding accepts standard and URL-safe Base64, with or without padding, and ignores whitespace. Data URLs always use standard, padded Base64 without wrapping.

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Recover the original file bytes

Use file decoding when the result is an image, PDF, archive, or text in an encoding other than UTF-8. The tool makes a local Blob from the decoded bytes. It does not open, preview, or execute the recovered file.

  1. Paste raw Base64 or a complete data:…;base64,… URL.
  2. Choose a download filename. Optionally set a MIME type; a Data URL supplies its own type.
  3. Select Decode to file, then Download decoded file to save the result.

Base64 to File example

data:text/plain;base64,SGVsbG8=hello.txt containing Hello

Choose hello.txt as the download filename. The Data URL provides text/plain; the saved file contains five bytes and no added newline.

Choose the filename and media type

Raw Base64 does not reliably identify a filename or media type. Use the extension appropriate for the original file, such as .png or .pdf. Without a supplied type, the tool uses application/octet-stream. Changing an extension does not convert one file format into another.

All conversions run locally in your browser. No input, files, filenames, or results are uploaded or saved by Base64Baboon. Copies and downloads you request are yours to manage. Read the privacy details. Base64 is encoding, not encryption.

THE SHORT ANSWERS

Base64 to File FAQ

Why did my image or PDF fail to open?

The value may be incomplete, contain the wrong bytes, or represent a different format. Check the source and filename extension. A successful Base64 decode confirms the encoding structure, not that the file itself is valid.

Are files sent to a server?

No. Validation, decoding, Blob creation, and download preparation happen locally. The app does not send content or filenames in network requests.

What is the file limit?

The decoded file can contain at most 64 MiB of bytes. Pasted Base64 also has a bounded text size, so excessive whitespace can reach the input limit sooner.

Restore a file from Base64 or a Data URL. Your browser prepares the download locally, preserving the decoded bytes.