Base64 to Text Decoder
Popular Conversions
| Base64 Input | Decoded Text |
|---|---|
| TWFu | Man |
| SGVsbG8= | Hello |
| V29ybGQ= | World |
| SGVsbG8gV29ybGQ= | Hello World |
Decoding Process
- Base64 uses 64 characters: A-Z, a-z, 0-9, +, / with = for padding.
- Every 4 characters represent 3 original bytes via 6-bit groups.
- Process: Group input into 4-char blocks, convert to 24 bits, split to 3 bytes, apply character set.
Common Scenarios
- Extract text from email attachments encoded in MIME format.
- Read configuration strings in JSON APIs or config files.
- Decode data URLs like de>data:text/plain;base64,SGVsbG8= to view content.
- Handle multi-line Base64 by removing newlines before decoding.
Frequently Asked Questions
- What if output shows garbled characters?
- Try different character sets like Latin-1 or UTF-16. Some data encodes binary files, not text.
- Does it support URL-safe Base64 (- and _)?
- Replace – with + and _ with /, add padding if needed, then decode.
- Is padding (=) required?
- Valid Base64 often includes it; tool handles missing padding automatically.
- Can it handle very long strings?
- Yes, processes up to browser limits securely in client-side JavaScript.
Visual Encoding Breakdown
For “Man”: M(19), a(22), n(5) → 010011|010110|000101|101110 → TWFu.