Base64 Encoder
Encode text or files to Base64.
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Heavy libraries load on demand so the page shell stays fast.
About Base64 Encoder
Base64 Encode converts text or file bytes to Base64 locally — common for data URLs, email attachments, and debugging binary fields. Encoding in-browser avoids pasting secrets into public converters.
How to use Base64 Encoder
- 1Paste text or choose the file/input mode the tool provides.
- 2Encode to Base64.
- 3Copy the output into your config, email MIME test, or data URL.
- 4Decode later with Base64 Decode if you need the original bytes back.
Frequently asked questions
Is Base64 encryption?
No. Base64 is encoding for transport, not confidentiality. Anyone can decode it.
Why does output get longer?
Base64 expands size by roughly 33%. That is expected for ASCII-safe transport.
URL-safe Base64?
Some systems need URL-safe alphabets. If your consumer rejects `+` or `/`, convert per that API’s docs after encoding.
Can I encode images?
Yes when the tool accepts binary input — useful for small icons as data URLs. Prefer files on disk for large assets.
Encode vs Decode which first?
Encode turns raw data into Base64. Use Base64 Decode when you already have an encoded string.