Does my text leave the browser?

Never. All hashing operations execute entirely within client-side Web Crypto memory.

Updated: August 2026 • Verified v1.2

Cryptographic Hash Generator (SHA-256, SHA-512, SHA-1)

Developer ToolsEssential

Compute secure cryptographic checksums using native W3C Web Crypto API with uppercase/lowercase formatting and bit-length auditing.

Local Browser Execution: Your input is processed locally in your browser and is not sent to UTL servers.

crypto.subtle.digest('SHA-256', UTF8_ArrayBuffer(text))

Was this calculation helpful?

Understanding Your Results

Displays exact hexadecimal string representations along with bit length (256-bit, 512-bit) and byte count.

Practical Guidance & Next Steps

Use SHA-256 or SHA-512 for modern cryptographic integrity. SHA-1 is provided for legacy checksum verification.

What is this?

A client-side security utility that calculates cryptographic digests (SHA-256, SHA-512, SHA-384, SHA-1) using hardware-accelerated Web Crypto.

How does it work?

1. Type or paste text or tokens into the input area. 2. View calculated hexadecimal hashes in real-time across multiple SHA algorithms. 3. Click 'Copy' for your required checksum format.

Why use it?

Guarantees that sensitive strings and API secrets are hashed strictly on your local CPU without ever touching an external network.

Technical Scope & Calculation Limitations

MD5 is obsolete and intentionally excluded from W3C Web Crypto for modern cryptographic security.

Frequently Asked Questions

Yes. It uses your operating system's native hardware cryptographic implementation.

Windows Desktop & Widget Options

Want this capability on your Windows desktop?

All Windows widgets

Desktop App

9.8/10

DevToys — Swiss Army Knife for Developers

Free open-source offline desktop app for Windows featuring 30+ formatters, converters, and hash tools.

FreeEasy InstallLow RAM

By Etienne Baudoux (DevToys Team)View Widget

Complementary Utilities

Related Tools for Your Workflow

All Developer Tools tools

developer

High Usage

Bcrypt Work Factor & Latency Security Calculator

HTML5 / React / TypeScriptStatic Utility

fun

Popular

Strong Password Generator

Generate ultra-secure, cryptographically random passwords and passphrases with length, character set, and readability filters.

HTML/CSS/JS Static Utility

developer

Essential

Diff Checker & Text Comparator

Compare two text blocks or code snippets side-by-side with line-by-line character difference highlighting and statistics.

Client-Side Longest Common Subsequence Static Utility

developer

Essential

Case Converter (camelCase, snake_case, kebab-case)

Transform text and code variable names across camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, and Title Case.

Client-Side Tokenization & Casing State MachineStatic Utility