TetraKits
Encode plain text to Base64 or decode Base64 back to readable text — results update as you type. Paste API tokens, data URIs, or configuration strings and copy the output with one click. The TetraKits Base64 Encoder runs entirely in your browser — free, private, and ready on mobile or desktop.
Overview
API debugging, JWT inspection, and data URI construction routinely need quick Base64 conversion. A browser encoder handles encode and decode with live output — no terminal, no npm package, no upload.
How to use the base64 encoder
- Choose encode or decode — Select Encode to convert text to Base64. Select Decode to reverse Base64 back to plain text.
- Paste your input — Enter text in the input field. Encoding handles UTF-8 characters; decoding expects valid Base64 padding.
- Copy the result — Use the copy button for output. For URL-safe transport, pair with the URL encoder after encoding.
Common use cases
- Choose encode or decode: Select Encode to convert text to Base64.
- Paste your input: Enter text in the input field.
- Copy the result: Use the copy button for output.
- Bookmark for quick access: Save the tool for repeat tasks without installing an app.
Frequently asked questions
What is Base64 encoding used for?
Base64 represents binary data as ASCII text — common in email attachments, JWT tokens, data URIs, and API payloads that must travel through text-only channels.
Can I decode invalid Base64?
Invalid padding or non-Base64 characters produce an error message. Check for extra spaces or truncated strings.
Is Base64 encryption?
No. Base64 is encoding, not encryption. Anyone can decode it. Do not use it to hide secrets.
Does it support Unicode text?
Yes. Encoding uses UTF-8 before Base64 conversion, so emoji and accented characters encode correctly.
Is this Base64 encoder free?
Yes. Unlimited encode and decode with no signup; all processing runs locally in your browser.
