The Best Text and File Hash Calculator Alternatives in 2026

Big Number Calculator evaluates very large mathematical expressions in a web browser.

This RSA calculator supports prime generation, encryption, and decryption.

Favicon Hash generates a hash from a website favicon for use in Shodan searches.

Manage two-factor authentication codes with OTP Auth, an iOS app listed on the App Store.

This HTML sanitizer tool converts text with special characters into HTML-safe output.

Generate secure SSL configurations for selected web, database, and mail software.

This browser-based converter turns user-supplied text into an image file for downloading or use in other documents.

Discover hosts and map networks with Nmap, a network exploration and security scanning tool.

Binary Ninja supports software reverse engineering and can be tried in a browser or installed as a desktop application.

Kismet monitors and captures Wi-Fi network traffic, with wireless intrusion detection and wardriving features.

The online assembler converts x86 and x64 instructions into machine-code bytes.

Ndiff compares Nmap scan results from two XML files, showing changes such as hosts and ports appearing or disappearing.

Manage Windows Firewall rules and receive outbound connection notifications with Windows Firewall Control.

Lucia was deprecated in March 2025. The website was updated in July 2026 and points to code/auth_session.ts as a single-file replacement for the NPM package and to the Auth Book for auth information.

The URL Decoder and Encoder converts text between encoded and decoded forms, including JavaScript URLs.

Solve reverse engineering challenges published on challenges.re, a challenge-focused site.

GoPlus offers Web3 security tools including audits, APIs, a user security hub, and a browser extension.

Search the National Vulnerability Database, a public resource for vulnerability information.

WhatsMyDNS checks DNS record propagation across global resolvers for record types including A, AAAA, MX, and TXT.

Fotor offers browser-based tools for cropping images, adding text, enhancing pictures, and removing backgrounds.

View Toronto Police calls for service on a map that updates in real time, according to the supplied page description.

Add proof-of-work verification to websites with mCaptcha, a privacy-focused automated CAPTCHA system.

Use Metasploit to find security issues, verify mitigations, and manage authorized penetration testing assessments.

The Snyk Security Database provides vulnerability details and remediation guidance for packages and cloud configurations.