Base64 & URL
Encoder / Decoder

Debug JWTs · Handle data URIs · Fix URL parameters · Encode files · Everything encoding.

Base64 Encoder / Decoder

URL-safe variant No padding Line breaks (76 chars) UTF-8 input

Plain Text

0 chars

Base64 Output

0 chars ·

Input bytes—

Output bytes—

Overhead—

Valid Base64—

URL Encoder / Decoder

encodeURIComponent encodeURI (full) RFC 3986 strict Form encode (+spaces)

Raw / Decoded

Encoded

Query Parameter Parser

JWT Inspector

— —

JWT Token

— . — . —

Header

—

Payload

—

Signature

—

Issued at—

Expires—

Not before—

Algorithm—

File → Base64

Drop any file here or

All file types supported · Processed locally in your browser

Include Data URI prefix Add line breaks

Base64 Output

Data URI Builder / Inspector

Input Data URI or URL

MIME Type—

Encoding—

Data length—

Decoded size—

Preview

Preview will appear here

Builder — Text to Data URI

MIME: Base64 encode

Generated Data URI

Encode / Decode Diff Viewer

Compare two encoded strings and see their decoded differences highlighted.

String A

String B

Base64 & URLEncoder / Decoder