Browser-only processing
Every conversion runs entirely in JavaScript on your device. No server-side processing.
Base64 Encoder & Decoder
100% local. No uploads. No storage.
Runs in your browser Your data stays on your device No tracking
LOCAL FILE PROCESSING
File conversion
No file selected
0 characters
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.
Saved you some time? Buy me a coffee ☕
PRIVATE BY DESIGN
Your data stays yours.
Base64Baboon performs encoding and decoding directly inside your web browser.
Your input is never uploaded to Base64Baboon or sent to an API.
Zero storage
No database. No saved input or output. Refresh the page and your workspace is cleared.
No tracking
No analytics, advertising trackers, tracking pixels, or cookies. You’re here to convert, not be tracked.
Built for workplace use
A simple utility for sensitive strings that don’t belong on a third-party processing server.
Don’t take our word for it. Verify it yourself.
Open your browser’s Developer Tools → Network tab, clear the log, then encode or decode text or a file. No request containing your input, output, or filename will be sent anywhere. The initial page load fetches only this site’s static files. No conversion needs a network request.
Local processing is useful where transmitting sensitive strings to a conversion service would be undesirable. Always follow your organisation’s security policies.
A QUICK PRIMER
A little about Base64.
What is Base64?
Base64 represents binary data using ASCII characters, so it can fit into text-based formats. Every three bytes become four characters, making the result roughly a third larger.
Hello World
SGVsbG8gV29ybGQ=Encoding. Not encryption.
Anyone with Base64 text can decode it. Base64 is an encoding format, not encryption. Base64Baboon protects privacy by performing the conversion locally in your browser rather than transmitting your data to a server.
Made for everyday dev work.
API payloads, JSON and XML, email attachments / MIME, embedding binary data, Data URLs, certificates and keys represented as text, and everyday developer debugging.
How to encode and decode Base64
How to encode Base64
- Choose Encode and paste text, or choose Files to select a local file.
- Select Encode to Base64. Text is converted to UTF-8; files keep their original bytes.
- Copy your result or download it. Advanced options control padding, line wrapping, and URL-safe output.
How to decode Base64
- Choose Decode and paste a Base64 value.
- Select Decode Base64 to recover UTF-8 text.
- For binary data, choose Files → Base64 → File, enter a filename, and download the decoded bytes.
Base64 vs Base64URL
Standard Base64 uses + and /; Base64URL uses - and _ in their place. Some protocols also omit the trailing = padding. For example, the UTF-8 text 🐒 becomes 8J+Qkg== in standard Base64 or 8J-Qkg in unpadded Base64URL. Both represent the same bytes. The Base64URL tool starts with URL-safe output selected.
THE SHORT ANSWERS
Good questions.
Straight answers.
No fine print.
No monkey business.
What is Base64?
Base64 represents bytes with a limited set of text characters. It is useful for carrying binary data in text-based formats, but it is reversible encoding, not encryption.
Is Base64Baboon free?
Yes. It is free to use, with no account required and no limit on the number of conversions. Browser memory limits still apply.
Is my data uploaded?
No. Text, files, filenames, and conversion results stay inside your browser. Conversions make no network requests.
Do you store my Base64 data?
No. Input and output are held temporarily in browser memory. We use no database, cookies, localStorage, sessionStorage, or IndexedDB. Refreshing clears the workspace. Copies and downloads you choose to make are yours to manage.
Can I use Base64Baboon for confidential information?
Local processing avoids sending your content to a conversion service. Use a trusted device and browser, and follow your organisation’s security policies. Base64 itself does not protect secrets.
Is Base64 encryption?
No. Base64 is a reversible encoding format, not encryption. Anyone who has the encoded value can decode it without a key.
Can I encode files and decode Base64 files?
Yes. Open Files to encode any file’s bytes or decode Base64 into a downloadable file. Both directions run locally. Files over 25 MiB show a memory warning; the file size limit is 64 MiB.
Does it support Base64URL?
Yes. Enable URL-safe Base64 in Advanced options to encode with - and _ instead of + and /. You can also omit padding. The decoder automatically accepts standard Base64 and Base64URL.
Does Base64 support Unicode?
Text uses UTF-8 through TextEncoder and TextDecoder, supporting accented characters, Japanese, Chinese, and emoji. Files are processed as raw bytes. If decoded bytes are not valid UTF-8, use Base64 → File.
Can my company use Base64Baboon?
Yes, subject to your company’s policies. No account is needed and conversion data is never sent to a server. We make no certification or compliance claims. Your organisation decides which tools are approved.
Encode text and files with Unicode and Base64URL support. Your data never leaves your browser.