Text Tools
Base64 Encoder
Convert text to base64 encoding instantly.
UTF-8 safe encoding. Copy the encoded text with one click.
Text Tools
Convert text to base64 encoding instantly.
UTF-8 safe encoding. Copy the encoded text with one click.
A Base64 encoder converts text, URLs, or binary data into Base64—a safe, portable text format used in APIs, email, databases, and web services. Use this tool when you need to transmit or store data that might contain special characters, spaces, or non-ASCII symbols.
Base64 is a text-based encoding scheme that converts any data (text, binary, images) into a 64-character alphabet of letters, numbers, plus signs, and slashes. A Base64 encoder transforms your plain-text input into this encoded format, which is safe to transmit via email, URLs, JSON, and APIs because it avoids special characters that might be misinterpreted or corrupted in transit.
The encoder reads your input text as binary digits (0s and 1s), then groups those bits into chunks of 6 bits each. Each 6-bit chunk maps to one of 64 characters (A–Z, a–z, 0–9, +, /). If the input length isn't a multiple of 3 bytes, the encoder pads the output with equals signs (=) to maintain a consistent length. The result is a longer, but safer, text representation of your data.
| Input | Result | Notes |
|---|---|---|
| Hello World | SGVsbG8gV29ybGQ= | 11 characters encode to 16 Base64 characters (padded with one =). The space is safely encoded as part of the sequence. |
| user@example.com | dXNlckBleGFtcGxlLmNvbQ== | Email addresses with @ symbols and dots are fully encoded, making them safe for URLs and API headers without percent-encoding. |
| 123ABC! | MTIzQUJDIQ== | Numbers and special characters like ! are encoded safely. The output contains only letters and numbers (plus = padding). |
No. Base64 is encoding, not encryption—it's a readable format change, not a security mechanism. Anyone with a decoder can reverse it. For sensitive data, use encryption (like AES) after Base64 encoding if needed.
Padding. Base64 works with 3-byte (24-bit) chunks mapped to 4 Base64 characters. If your input isn't a multiple of 3 bytes, the encoder adds = to pad the output and keep it valid. One or two = signs are normal and necessary.
Yes, if you convert them to text first. Many tools let you upload image files and output Base64. This text-based encoder works with text content; for binary files, use a file-to-Base64 converter.
URL encoding uses percent signs and hex codes (e.g., %20 for space). Base64 uses a different alphabet (A–Z, a–z, 0–9, +, /). URL encoding is for URLs; Base64 is for APIs, emails, and data transport. Some APIs accept Base64; others need URL encoding.
Yes, Base64 encoding is lossless—decoding always reproduces the exact original. No information is lost. This is why it's reliable for storing and transmitting data across systems.
Most web-based encoders handle text up to several megabytes, though very large inputs may slow your browser. For bulk encoding, consider a command-line tool or script (e.g., 'base64' in Linux/Mac, 'certutil' in Windows).