Encoding & Decoding Tools
Encode text for transport and inspect Base64, URLs, JWT claims, HTML entities and image data URIs.
10 tools with local browser processing.
All encoding & decoding tools
Base64 Encode
Encode text and Unicode strings to Base64 online. Copy standard Base64 output instantly and keep every character private with client-side processing.
Base64 Decode
Decode Base64 to readable text online, including standard and URL-safe strings. Handle Unicode safely and keep encoded data private in your browser.
JSON to Base64
Encode JSON to Base64 online after validating the input. Create compact transport-safe strings for URLs, tokens and configs entirely in your browser.
Base64 to JSON
Decode Base64 strings into readable JSON online. Validate and pretty print decoded objects for JWT payloads and API data in your browser.
URL Encode
URL-encode text and query values online with percent encoding. Safely encode spaces, Unicode and reserved characters using browser-side processing.
URL Decode
Decode percent-encoded URLs and query strings online. Convert %20, %2F and Unicode escape sequences back to readable text instantly.
JWT Decoder
Decode JWT tokens online to inspect header, payload, claims and expiration times. No token is uploaded; decoding happens entirely in your browser.
HTML Encode
Encode special characters into safe HTML entities online. Escape angle brackets, ampersands, quotes and Unicode text in your browser.
HTML Decode
Decode HTML entities into their original characters online. Convert named and numeric entities such as & and ' in your browser.
Image to Base64
Convert images to Base64 data URIs online or decode Base64 back to an image. Preview output locally without uploading image files.
Choose the right tool
Choose the format required by the destination. Base64 represents bytes; percent encoding protects URL components; HTML entities represent characters inside markup. None of these encodings encrypts a secret. JWT decoding reveals claims but does not verify a signature.
- Base64 Decode: Decode Base64 to readable text online, including standard and URL-safe strings. Handle Unicode safely and keep encoded data private in your browser.
- Base64 Encode: Encode text and Unicode strings to Base64 online. Copy standard Base64 output instantly and keep every character private with client-side processing.
- JWT Decoder: Decode JWT tokens online to inspect header, payload, claims and expiration times. No token is uploaded; decoding happens entirely in your browser.
- URL Encode: URL-encode text and query values online with percent encoding. Safely encode spaces, Unicode and reserved characters using browser-side processing.
- URL Decode: Decode percent-encoded URLs and query strings online. Convert %20, %2F and Unicode escape sequences back to readable text instantly.
- Image to Base64: Convert images to Base64 data URIs online or decode Base64 back to an image. Preview output locally without uploading image files.