ASCII text
Before
Hello
After
SGVsbG8=
Base64 Encode
Encode plain text—including Unicode emoji—into Base64 for data URLs, JWT payloads, and API fields that require ASCII-safe strings.
Base64 Encode
Text is encoded to Base64 instantly.
Text to encode as Base64
Base64-encoded string
Input: 0 chars
Output: 0 chars
Status: ready
Your text stays in your browser — nothing is uploaded.
How to Use
- Paste UTF-8 text into the input area.
- Copy the Base64 output from the panel.
- Use the encoded string in JSON, headers, or data URIs as required.
- Switch to Base64 Decode to verify round-trip accuracy.
Example
Plain text
Hello, 世界!
Base64
SGVsbG8sIOS4lueVjCE=
Before and After Examples
Unicode
Before
café
After
Y2Fmw6k=
Credentials
Before
admin:secret
After
YWRtaW46c2VjcmV0
JSON value
Before
{"ok":true}
After
eyJvaSI6dHJ1ZX0=
What This Tool Does
Base64 Encode represents binary UTF-8 bytes as ASCII characters using the Base64 alphabet plus optional padding equals signs. It is the standard way to embed small text blobs in JSON, XML, email MIME parts, and configuration files that only accept printable ASCII. Decode results with Base64 Decode or chain to URL Encode for transport-safe strings.
Guidelines
Tip
Creating data URI snippets for inline SVG or small images
Practice
Encoding credentials or tokens for HTTP Basic auth examples
Use case
Preparing text fields in API test collections
Note
Embedding Unicode in systems limited to ASCII transport
Common Uses
Best Practices
Paste UTF-8 text into the input area.
Copy the Base64 output from the panel.
Use the encoded string in JSON, headers, or dat…
Switch to Base64 Decode to verify round-trip ac…
Creating data URI snippets for inline SVG or sm…
Encoding credentials or tokens for HTTP Basic a…
Preparing text fields in API test collections
Embedding Unicode in systems limited to ASCII t…
Popular Workflows
Notes & Limitations
All processing runs locally in your browser. Results may vary with edge-case characters or very large inputs.
Frequently Asked Questions
Is Base64 encryption?
No. Base64 is encoding—anyone can decode it. Do not treat it as secrecy.
Is text uploaded to encode?
Encoding runs in your browser; source text never leaves your device.
Why does output end with =?
Padding aligns bit groups; some outputs omit padding but decode the same.
Does it handle emoji?
Yes. UTF-8 bytes encode fully, including multi-byte emoji characters.