Base64 Encoder
Base64 Encoder: free, instant and private. Base64 makes data safe for text-only channels like email headers and JSON; it is encoding, not encryption, and anyone can reverse it.
How the Base64 Encoder works
The Base64 Encoder takes Input text, Mode and returns the answer instantly — no button to hunt for, no page reload. Base64 makes data safe for text-only channels like email headers and JSON; it is encoding, not encryption, and anyone can reverse it. Text is encoded as UTF-8, so non-ASCII characters survive the round trip.
Enter your own numbers to replace the example values; the result panel updates as you type. Everything runs in this single page, so nothing you enter leaves your device.
Formula used
3 bytes → 4 base64 characters from the 64-symbol alphabet
| Symbol | Meaning |
|---|---|
| input | the text to encode, or a base64 string to decode |
Base64 makes data safe for text-only channels like email headers and JSON; it is encoding, not encryption, and anyone can reverse it. Text is encoded as UTF-8, so non-ASCII characters survive the round trip.
Inputs used: Input text, Mode.
Worked example
Take the default example — input text of ToolFactory — free tools, mode set to Encode:
- Output: VG9vbEZhY3Rvcnkg4oCUIGZyZWUgdG9vbHM=
Frequently asked questions
- What formula does the Base64 Encoder use?
- It uses 3 bytes → 4 base64 characters from the 64-symbol alphabet, where input is the the text to encode, or a base64 string to decode.
- Is the Base64 Encoder free?
- Yes. There is no signup, no usage limit and no watermark — the converter runs entirely in your browser.
- How do I read the result?
- Base64 makes data safe for text-only channels like email headers and JSON; it is encoding, not encryption, and anyone can reverse it. Text is encoded as UTF-8, so non-ASCII characters survive the round trip.
- Does the Base64 Encoder store or send my data?
- No. Every calculation happens locally in the page, so the numbers you type are never uploaded or logged.
- Does it work on a phone and offline?
- Yes — the page is a single lightweight file that adapts to any screen size. Once it has loaded it keeps working without a network connection.