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Free Hash & Encoder. Generate MD5, SHA-256, Base64, and JWT encodings online for free. A developer toolkit for hashing and encoding — runs fully in your browser.

Hash & Encode Toolkit

Generate hashes, encode/decode Base64, URL encode, and decode JWT tokens

Input

All processing happens in your browser. No data is sent to any server.

Key Features & Benefits

SHA Hash Generation

Generate SHA-1, SHA-256, and SHA-512 cryptographic hashes from any text input using the Web Crypto API. These are the industry-standard hash algorithms used for data integrity verification, password hashing, and digital signatures.

Base64, URL & HTML Encoding

Encode and decode text in Base64, URL-encoded, and HTML-encoded formats with a single click. Switch between all six modes (Base64 encode/decode, URL encode/decode, HTML encode/decode) instantly.

JWT Token Decoder

Decode JSON Web Tokens (JWT) to inspect the header, payload, and signature sections. Automatically detects and displays token expiration times, making it easy to debug authentication issues.

Copy Results Instantly

Every output — hash values, encoded/decoded text, and decoded JWT sections — has a one-click copy button. No need to manually select and copy text.

Browser-Side Cryptographic Security

All hashing and encoding operations use your browser's built-in Web Crypto API and native JavaScript functions. No data is transmitted to any server, making it safe for working with sensitive tokens and credentials.

Hash & Encode Toolkit – Frequently Asked Questions

What is a SHA hash?
A SHA (Secure Hash Algorithm) hash is a fixed-length cryptographic fingerprint of input data. SHA-256 produces a 64-character hex string, SHA-512 produces 128 characters, and SHA-1 produces 40 characters. Hashes are one-way functions — you cannot reverse a hash back to the original input. They are used for verifying data integrity, password storage, and digital signatures.
What is the difference between Base64 and URL encoding?
Base64 encoding converts binary data into ASCII text using A-Z, a-z, 0-9, +, and / characters — commonly used for embedding binary data in JSON or HTML. URL encoding (percent-encoding) replaces unsafe characters with %XX codes — used for passing data in URLs. They serve different purposes and produce different outputs.
Can I verify a JWT signature?
This tool decodes JWT tokens to display the header, payload, and signature sections in readable JSON format. However, it does not verify the cryptographic signature — that requires the secret key used to sign the token. The decoded output is useful for inspecting token contents and checking expiration times.
Why is MD5 not available?
MD5 is considered cryptographically broken and is not supported by the Web Crypto API. We recommend using SHA-256 or SHA-512 for any security-sensitive applications. SHA-1 is also available but is deprecated for security purposes — use it only for legacy compatibility.
Is my data safe when using this tool?
Yes. All hashing, encoding, and decoding operations run entirely in your browser. No data is sent to any server. The Web Crypto API used for SHA hashing is the same security infrastructure used by HTTPS websites. Your sensitive tokens and data never leave your device.