Hash & Encoder Tools
Compute MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes. Encode/decode Base64, URL, HTML entities, Hex, Binary. UTF-8 safe. Drop a file to hash it directly. No upload, no signup.
Input
Output
A developer's Swiss-army knife for hashing & encoding
Every day, developers need to compute a hash, encode a Base64 string, URL-encode a value, or unescape HTML entities. The usual workflow involves jumping between several scattered sites (each plastered with ads). This page brings the most common 15 operations into a single, consistent interface.
Hashes (MD5, familia SHA)
We compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512. SHA hashes use the browser's native Web Crypto API — fast and standardized. MD5 is shipped as a small in-house implementation since Web Crypto deliberately omits it (cryptographically broken since 2005, but still useful for file checksums and content addressing).
File hashing: drop any file into the input box, or click "Drop or pick a
file". We read it as raw bytes and hash directly — the result will match exactly what
md5sum, sha256sum and the corresponding macOS / Windows tools
produce.
Base64 (seguro UTF-8)
JavaScript's built-in btoa() throws on any Unicode character above U+00FF —
which means it fails on accents, emojis, kanji, anything outside Latin-1. Our encoder
round-trips through a UTF-8 byte buffer, so it handles any Unicode correctly.
Decoding also tolerates whitespace and the URL-safe variant (- instead of
+, _ instead of /).
Codificación URL
Uses encodeURIComponent, which is the right choice for embedding values in URL
path segments or query parameters. Spaces become %20, ampersands become
%26, etc.
Entidades HTML
Escape converts the 5 dangerous characters (&,
<, >, ", ') to their entity form
— handy for sanitizing user input before inserting into HTML. Unescape
handles named entities (©, — …), numeric
(A) and hexadecimal (👋), including non-BMP
Unicode like emojis.
Hex & Binary
Converts text to a hexadecimal or binary representation of its UTF-8 bytes, and back. The
decoders are forgiving — they accept spaces, line breaks and 0x prefixes for
hex.
Privacidad
Nothing is ever uploaded. Hashes, encodings and file reading all happen locally. We don't store anything, we don't log anything, we don't analyze anything — there isn't even a server component that could.
Casos de uso frecuentes
- Verify a download matches its published
sha256checksum. - Decode a Base64 string from a JWT, email header or config file.
- URL-encode a query value to test a problematic redirect.
- Strip HTML entities from text scraped from a webpage.
- Generate a deterministic content hash for caching or deduplication.
Preguntas Frecuentes
- ¿Qué algoritmos de hash soporta esta herramienta?
- MD5, SHA-1, SHA-256, SHA-384 y SHA-512. Los hashes SHA usan la API Web Crypto nativa del navegador para velocidad y seguridad. MD5 se proporciona mediante una implementación del lado del cliente.
- ¿Es seguro hashear datos sensibles en línea?
- Sí. Esta herramienta se ejecuta completamente en tu navegador — tus datos nunca se envían a ningún servidor. No hay componente backend que pueda almacenar o interceptar tu entrada.
- ¿Qué formatos de codificación están disponibles?
- Codificación/decodificación Base64 (compatible con UTF-8), codificación/decodificación URL, escape/unescape de entidades HTML, codificación/decodificación Hex y codificación/decodificación Binaria.
- ¿Puedo decodificar un hash de vuelta al texto original?
- No. Los hashes criptográficos son funciones unidireccionales y no se pueden revertir. Sin embargo, sí puedes decodificar Base64, codificación URL, entidades HTML, Hex y Binario de vuelta al texto original.
- ¿Esta herramienta es gratis?
- Sí, completamente gratis sin límites de uso, sin registro y sin marcas de agua.