Online Security Hash Generator

Calculate MD5, SHA-1, SHA-256 and SHA-512 hashes instantly. Free, private and ultra-fast security tool for developers. 100% Client-Side.

MD5 ...
SHA-1 ...
SHA-256 ...
SHA-512 ...
Utilities Studio

Want this utility on your website?

Customize colors and dark mode for WordPress, Notion or your own site.

Go Ahead

Frequently Asked Questions

What is a hash and what is it used for?

A hash is a unique digital fingerprint of a text or file. It is used to verify that data has not been tampered with and to store passwords securely.

Is it safe to use this online generator?

Yes, it is completely safe. Unlike other sites, we process the hash directly in your browser. Your data is never sent to any server.

Which hash algorithm should I choose?

For modern security and key storage, we recommend SHA-256 or SHA-512. MD5 and SHA-1 should only be used for compatibility with legacy systems.

What does adding a 'Salt' mean?

A Salt is an extra string mixed with your text to make the hash unique and much harder to crack through dictionary attacks.

# What is a Cryptographic Hash?

A cryptographic hash is a mathematical function that transforms any amount of data into a fixed-length string. The same input always produces the same output, but any minimal change in the input generates a completely different hash.

# Available algorithms

  • MD5 (128 bits): Fast and widely supported. Considered insecure for passwords but useful for file integrity checks in non-critical environments.
  • SHA-1 (160 bits): Deprecated for critical security uses since 2017. Still present in legacy systems.
  • SHA-256 (256 bits): The current standard for most applications. Used in Bitcoin, TLS and code signing.
  • SHA-512 (512 bits): Longer variant of SHA-2, ideal when maximum collision resistance is required.

# Salt and Key Stretching

The Salt is a random string added to the text before hashing, ensuring that two identical inputs produce different hashes. Key Stretching (rounds) applies the hash function multiple times to harden against brute-force attacks.

# Total privacy: 100% Client-Side

This tool uses the browser's Web Crypto API for SHA and a pure TypeScript implementation for MD5. All processing happens locally: your data never leaves your device.

Bibliographic References

More utilities from Web Development

Free Online JSON Formatter and Validator

Free online tool to format, validate and repair JSON code. Beautify and format JSON. Detects syntax errors and improves code readability.

Use Tool

Free Online SVG to CSS and Data URI Converter

Transform your SVG icons and vectors into CSS code (Background or Mask) or compressed Data URI. Optimise your website performance by eliminating external HTTP requests.

Use Tool

Aspect Ratio Calculator in Pixels. Online Proportions

Calculate new image, video and web design resolutions and maintain the exact proportion to avoid distorting graphics. Supports 16:9, 4:3, 21:9 and custom formats.

Use Tool

Placeholder Image Generator. Rapid Web Mockups Online

Create custom placeholder images for your web designs. Adjust resolution, background, text and export in PNG, WebP or JPEG instantly.

Use Tool

URL Encoder and Decoder Online

Convert special characters from any link to safe format (Percent-Encoding) or return them to their original readable state instantly and locally.

Use Tool

Duplicate CSS Remover Online. Unify and Clean Stylesheets

Free tool to clean and purge duplicate CSS code. Unifies redundant selectors, respects the cascade, and reduces your file size instantly in the browser.

Use Tool

CSS to Inline HTML Converter. Inliner for Emails

Transform your stylesheets and CSS classes into automatically inlined styles in your HTML. Ideal for newsletters, transactional emails, and safe web layout.

Use Tool

CSS Specificity Calculator Online. Selector Weight Visualizer

Calculate the specificity and exact weight of any CSS selector. Visual tool to understand which CSS rule wins the cascade and avoid using !important.

Use Tool

Online Cron Expression Generator. Translator and Visualizer

Free visual tool to generate Linux Cron expressions. Translates * * * * * into human language and shows the next 5 executions in real time.

Use Tool

Online Keyboard Key Code Visualizer. KeyCode Inspector

Free online tool to see the event.key, event.code, event.which and location of any keyboard key in real time. Generates ready-to-use JavaScript code snippets.

Use Tool

LLM Cost Calculator. AI Model Pricing Estimator

Free online tool to estimate the cost of calling LLM APIs. Compare GPT-4o, Claude, Gemini, Llama and more with real token prices per million tokens.

Use Tool

Musical Typography Scale. Modular Scale Calculator

Free online tool to create harmonious visual hierarchies using modular scales based on musical proportions. Generates ready-to-use CSS variables for your web design.

Use Tool

Mobile Mockup Generator for App Store. iPhone and Google Pixel

Create professional presentations for the App Store and Google Play. iPhone and Pixel mockups with custom backgrounds, panoramic layouts, and bulk high-resolution export.

Use Tool

Private AI Prompt Library

Organize, tag and save your ChatGPT, Midjourney and Claude prompts privately. Your own prompt bank in localStorage.

Use Tool

Online Color Converter RGB HEX and HSL

Convert colors between RGB, HEX and HSL instantly. Generate complementary color harmonies and analyze WCAG contrast. 100% client-side and private.

Use Tool

Visual Readability Calculator WCAG and APCA

Check the real contrast of your designs with APCA (WCAG 3.0). Analyze how font weight and size affect actual readability. From simple ratios to perceptual legibility.

Use Tool

Online SVG Sanitizer

Optimize and clean SVGs exported from Figma, Adobe Illustrator or Inkscape. Remove metadata, unnecessary attributes and empty groups to get a production-ready SVG.

Use Tool

UTM Parameter Generator for Google Analytics

Create precise tracking links for your digital marketing campaigns. Optimized for Google Analytics and other analytics tools.

Use Tool

URL Tracking Cleaner: Remove UTM, FBCLID and GCLID

Automatically remove tracking and advertising parameters from your URLs. Share clean links and protect your digital privacy instantly.

Use Tool

Online SSL/TLS Certificate Inspector View PEM and CRT Files

Analyze SSL certificate files (.pem, .crt, .der) locally. Check expiration dates, issuers, subjects and SHA-256 fingerprints without your data leaving your browser.

Use Tool

Security.txt Generator RFC 9116

Create your professional security.txt file to facilitate vulnerability reporting and comply with international web security standards.

Use Tool

Data Time Calculator Impact of Web Speed

Discover how much lifetime your users lose waiting for your website to load on 3G, 4G, and 5G connections. Calculate the real impact of your site weight.

Use Tool

Excel and CSV to HTML Table Converter Code Generator

Convert your Excel or CSV data to clean, semantic HTML tables instantly. Free tool for developers and content creators.

Use Tool