Is it safe to generate hashes for passwords here?

Yes. The TechAlmirah Hash Toolkit operates entirely client-side. The JavaScript runs inside your browser and never sends your input or the generated hashes to our servers.

What is the difference between a Hash and Base64 Encoding?

Encoding (like Base64) is a two-way process designed to transform data into a universally readable format; it can be easily decoded back to the original string. Hashing (like SHA-256) is a one-way mathematical function used for verifying data integrity; you cannot "decode" a hash back into the original text.

HMAC (Hash-based Message Authentication Code) is a specific type of MAC involving a cryptographic hash function and a secret cryptographic key. It is commonly used to verify the data integrity and authenticity of API webhooks.

Why am I getting "Input is not valid Base64" when decoding?

Base64 strings must have a length that is a multiple of 4, and they can only contain alphanumeric characters plus +, /, and =. If your input does not strictly follow this format, the browser cannot decode it.

Hash Generator & Base64 Encoder – Free Online Tool

The Ultimate Developer Toolkit for Hashes & Encodings

Developers frequently need to generate a quick SHA-256 hash, decode a Base64 string, or calculate an HMAC signature to debug an API webhook. Instead of opening 8 different browser tabs or pasting your secret API keys into questionable online generators, we built a single, unified dashboard.

Our Hash & Encoding Toolkit combines 8 of the most common cryptographic and encoding utilities into one lightning-fast, 100% offline tool.

Included Utilities

Cryptographic Hashes: Instantly generate MD5, SHA-256, and SHA-512 hashes.
HMAC Generator: Enter an optional "Secret Key" to instantly sign your string using HMAC-SHA256, perfect for verifying Stripe or GitHub webhook payloads.
Base64 Encode/Decode: Convert strings to Base64 (useful for Basic Auth headers or Kubernetes secrets) and securely decode them back.
URL Encode/Decode: Safely encode special characters (like `?` and `&`) to be used inside URL query parameters.

How This Tool Works

This tool is powered by the battle-tested crypto-js library. As you type into the single input field, React state instantly triggers all 8 calculations simultaneously.

Type your input: Enter any text, password, or JSON string.
Client-Side Processing: Your browser's CPU calculates the hashes and encodings in real-time.
Instant Copying: Click the "COPY" button on any generated output box to grab the exact string you need.

Key Benefits

100% Client-Side Privacy: Never paste a production API key or user password into an online tool again. Because this executes entirely in your browser, your data is never transmitted over the internet.
Unified Workflow: See how the same string looks in Base64, URL-encoded, and SHA-256 all at exactly the same time.
Live HMAC Testing: Debugging webhook signatures is notoriously difficult. Our live HMAC calculator lets you verify if your backend code is generating the correct signature.

Common Use Cases

Webhook Verification: Re-calculating an HMAC signature to ensure an incoming Stripe payment webhook is authentic and hasn't been tampered with.
API Authentication: Base64-encoding a `username:password` string to pass into an `Authorization: Basic` HTTP header.
Data Integrity: Generating a SHA-256 hash of a text string to verify it against a stored checksum in a database.

Related Engineering Tools

Protect your workflow with our other free developer utilities:

Frequently Asked Questions

Is it safe to generate hashes for passwords here?: Yes. The TechAlmirah Hash Toolkit operates entirely client-side. The JavaScript runs inside your browser and never sends your input or the generated hashes to our servers.
What is the difference between a Hash and Base64 Encoding?: Encoding (like Base64) is a two-way process designed to transform data into a universally readable format; it can be easily decoded back to the original string. Hashing (like SHA-256) is a one-way mathematical function used for verifying data integrity; you cannot "decode" a hash back into the original text.
What is an HMAC?: HMAC (Hash-based Message Authentication Code) is a specific type of MAC involving a cryptographic hash function and a secret cryptographic key. It is commonly used to verify the data integrity and authenticity of API webhooks.
Why am I getting "Input is not valid Base64" when decoding?: Base64 strings must have a length that is a multiple of 4, and they can only contain alphanumeric characters plus +, /, and =. If your input does not strictly follow this format, the browser cannot decode it.