Add your input
Text or an encoded value.
Code drawer
Base64 & URL encoder
Handle common transport encodings with transparent UTF-8 behavior.
Privacy built inYour work stays with you
Output
Your result will appear here.
Your work stays private in your browser while you use this tool.
What does base64 & url encoder do?
Encode or decode UTF-8 text as Base64, unpadded Base64URL, or percent-encoded URL-component text. A completed result can be moved back into the input for a round-trip check.
- Input
- Text or an encoded value.
- Result
- Base64 or URL-encoded/decoded text.
- Price
- Free
- Account
- Not required
How to use base64 & url encoder
Choose your settings
Handle common transport encodings with transparent UTF-8 behavior.
Save or copy
Base64 or URL-encoded/decoded text.
A practical tip
Encoding is not encryption; never treat Base64 as protection for a secret.
When to use base64 & url encoder
Inspect the UTF-8 Base64 representation of a short text payload.
Decode a Base64URL segment while debugging a token or web protocol.
Percent-encode a user-supplied value before placing it in one URL query component.
Worked example
A concrete base64 & url encoder example
- Input
- café
- Settings
- Base64 encode
- Result
- Y2Fmw6k=, which decodes back to the original four-character UTF-8 text.
What to expect
How it works
TextEncoder and TextDecoder perform strict UTF-8 conversion around the browser's binary Base64 functions. Base64URL replaces + and / with - and _, removes padding when encoding, and restores padding when decoding. URL mode delegates to encodeURIComponent() and decodeURIComponent().
Know before using
Limits and edge cases
- Encoding does not encrypt, authenticate, compress, or hide a value. Anyone who recognizes the encoding can reverse it.
- Decode output must be valid UTF-8 text; arbitrary binary Base64 may be rejected. URL mode encodes one component rather than constructing or validating a complete URL.
Standards and sources
Common questions
Base64 & URL encoder FAQ
Is base64 & url encoder free to use?
Yes. Base64 & URL encoder is free to use.
Does base64 & url encoder keep my work private?
Yes. Your work stays private while you use the tool — nothing you enter is uploaded.
What is different about Base64URL output?
It uses - and _ instead of + and / and this tool omits trailing = padding. Those changes make the alphabet more convenient inside URL and filename contexts.
Can I use Base64 to protect a password or secret?
No. Base64 is a reversible representation, not encryption or hashing. Use an appropriate security mechanism for secrets.