hash-calculator

Calculate cryptographic hashes for text and files using MD5, SHA1, SHA256, SHA512, and BLAKE2.

86|18|Updated Dec 14, 2025

Search Tags:#security #data integrity #cryptography #hashing #checksum #file verification

Ready to run

npx skills add https://github.com/dkyazzentwatwa/chatgpt-skills --skill hash-calculator

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: hash-calculator
Source: https://github.com/dkyazzentwatwa/chatgpt-skills/tree/main/hash-calculator
Command: npx skills add https://github.com/dkyazzentwatwa/chatgpt-skills --skill hash-calculator

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill provides a robust and efficient way to calculate cryptographic hashes for text and files, ensuring data integrity and security.

Core Features & Use Cases

Versatile Hashing: Supports a wide range of algorithms including MD5, SHA1, SHA256, SHA512, and BLAKE2.
File Integrity Verification: Easily verify if a downloaded file matches its expected hash.
Batch Processing: Hash multiple files within a directory or generate checksum files for releases.
Use Case: Verify the integrity of a downloaded software ISO by comparing its hash against the one published on the official website.

Quick Start

Calculate the SHA256 hash for the file named 'my_document.txt'.

Frequently Asked Questions about hash-calculator

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I calculate a SHA256 hash for a text string or file?▼

To calculate a SHA256 hash, you can process text strings or files using supported algorithms like SHA256, MD5, SHA1, SHA512, and BLAKE2. It operates efficiently on large files through streaming.

How do I verify the integrity of a downloaded ISO file against a published checksum?▼

You can verify file integrity by calculating the cryptographic hash of your downloaded file and comparing it against the expected checksum. This skill supports direct checksum file generation and verification.

Can I generate checksum files for an entire directory in batch?▼

Yes, batch processing allows you to hash multiple files within a directory. You can generate checksum files for releases or bulk verify data integrity across numerous files simultaneously.

What cryptographic hashing algorithms are supported for file verification?▼

Supported cryptographic hashing algorithms include MD5, SHA1, SHA256, SHA512, and BLAKE2. These algorithms enable secure text and file hashing for various data integrity verification needs.

Does hashing large files require loading the entire file into memory?▼

No, hashing large files does not require loading the entire file into memory. The process operates efficiently on large files through streaming, ensuring stable memory usage during calculation.