The Best Graphviz Online Alternatives in 2026

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

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

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

Test a browser for privacy leaks, including exposed IP addresses, device information, and fingerprinting risks.

See what information a website can access from your browser with Webkay, a browser data demonstration.

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

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

Test how trackers and fingerprinting systems see your browser with Cover Your Tracks from the EFF.

Check browser fingerprints and run DNS leak, IP, port, and WebRTC tests with BrowserScan.

This HTML editor supports writing and converting HTML, including Word-to-HTML conversion in a browser interface.

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

Test browser fingerprinting characteristics with CreepJS, which displays fingerprint and WebRTC results.

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

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.

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

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.

DNSPerf compares the performance and uptime of enterprise and commercial DNS providers.

Search a community-curated collection of bug bounty writeups and learning resources.