Hex Viewer

Encode text to Base64 or decode Base64 back to text right in your browser — type or paste your text, switch between encode and decode, and get the result immediately, or a clear error message if the Base64 you pasted isn't valid. Accented characters, emoji, and non-Latin scripts are handled correctly through UTF-8 safe encoding, so a word like 'café' or an emoji round-trips exactly as typed. It is handy when embedding small data in a URL or config file, inspecting a Base64-encoded token, or preparing a text payload for an API that expects Base64. Everything runs locally using the browser's own encoding APIs, so no text you enter is ever sent to a server or stored anywhere.

URL Encoder / Decoder converts text to and from percent-encoding with the browser's encodeURIComponent and decodeURIComponent. It escapes one URL component — a single query-string value or path segment — not a whole address: a full URL run through Encode comes back with :// turned into %3A%2F%2F. The characters A-Z, a-z, 0-9 and - _ . ! ~ * ' ( ) are left untouched; spaces, &, =, /, ?, # and the rest are escaped. Decode reverses it and reports a clear error on a malformed % sequence; a + is left as a literal plus, not turned into a space. Unlike the Base64 Encoder it keeps text readable and only escapes unsafe characters, and unlike URL Parser & Analyzer it transforms a fragment rather than splitting a full URL into parts. Input is limited to 2 MB and stays in the browser.

Generate a random UUID (version 4) in your browser — click Generate to get a fresh, RFC 4122-compliant identifier, then copy it with one click or generate another. Every UUID is produced using your browser's cryptographically secure random number generator (the Web Crypto API), the same source used for encryption keys, never a weak pseudo-random fallback — if that secure API isn't available, a clear error is shown instead of silently generating a lower-quality identifier. It is handy when you need a unique identifier for a database record, a test fixture, or a temporary key while prototyping. Everything runs locally in your browser, so no identifier you generate is ever sent to a server or stored anywhere.

Generate a SHA-256, SHA-384, or SHA-512 hash from text in your browser — type or paste your text, choose an algorithm, and get the hexadecimal digest immediately, using your browser's native Web Crypto API rather than a custom implementation. A SHA hash is one-way: it produces a fixed-length fingerprint of the input that cannot be reversed back into the original text, which is exactly what's useful for verifying that a piece of text or a downloaded value matches an expected digest, or generating a deterministic identifier from text content. SHA hashing is not encryption, and hashing a password directly with SHA is not a secure way to store passwords — dedicated password-hashing algorithms with salting exist for that purpose and are outside the scope of this tool. Everything runs locally in your browser, so no text you enter is ever sent to a server or stored anywhere.