File to Base64

100% local. No uploads. No storage.

Runs in your browser Your data stays on your device No tracking

LOCAL FILE PROCESSING

File conversion

Drop a file here or choose a fileAny file type.

No file selected

Include Data URL prefix

Base64 result

0 characters

Files never leave your device.

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

Advanced options

URL-safe Base64Uses - and _ instead of + and /, following the Base64URL convention. Include = paddingTurn off for unpadded Base64URL.Line wrapping

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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Encode a file without uploading it

Selecting a file gives this page access to its bytes in browser memory. It does not upload the file. The encoder reads the raw bytes without changing the file’s contents, character encoding, or line endings.

Choose a file or drop one into the file area. The maximum size is 64 MiB.
Leave Include Data URL prefix off for raw Base64, or enable it when you need a media type prefix.
Select Encode file, then copy the result or download it as a .base64.txt file.

File to Base64 example

hello.txt containing HelloSGVsbG8=

A five-byte UTF-8 file containing exactly Hello, without a newline, produces this result. As a text/plain Data URL it becomes data:text/plain;base64,SGVsbG8=.

File size and browser memory

Base64 expands the byte count by roughly one third. A 3 MiB file produces 4 MiB of Base64 before any prefix or wrapping. The app warns above 25 MiB and rejects files above 64 MiB before reading them. Smaller files are more comfortable on mobile devices.

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

File to Base64 FAQ

Which file types can I encode?

Any file type, including images, PDFs, ZIP archives, and text. The converter encodes bytes; it does not inspect or render the file’s contents.

Does Base64 include my filename?

No. Raw Base64 contains the file bytes. A Data URL adds a media type, not a filename. Your selected filename is only used locally for the suggested result download name.

Can I make URL-safe file output?

Yes. Enable URL-safe Base64 in Advanced options for raw output. Data URLs always use the standard alphabet, padding, and no line wrapping.

Turn a local file into raw Base64 or a Data URL. Images, PDFs, archives, and text files are read entirely in your browser.