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URL Encode / Decode

encodeURIComponent
Input
Output
encodeURIComponent encodes all special characters including : / ? # @ & = + $ ,

Base64 Encode / Decode

btoa / atob
Input
Output

JSON Formatter / Minifier

JSON.parse
Input JSON
Output

Hash Generator

Web Crypto API
Input Text
Hash Output
SHA hashes are one-way functions and cannot be reversed or decrypted.

JWT Decoder

header.payload.sig
JWT Token
Decoded
Signature is NOT verified — this tool is for inspecting token contents only.

HTML Entities Encode / Decode

& < >
Input
Output

String Case Converter

camelCase · snake_case
Input
Output

Text Diff

line-by-line
Original
Modified
Diff Result