Free tools
Free security & privacy tools
Interactive tools
Client-side utilities for the things people actually ask me about: how exposed their data is, whether a password is strong or already breached, and how to generate a better one.
- Data exposure check
An honest, browser-only read of your data-broker exposure, with a real opt-out plan. No data leaves your device, no signup.
- Password strength & breach check
Check a password's real entropy and crack time, and whether it has leaked in known breaches, all in your browser. Your password never leaves the device.
- AI Implementation Readiness Assessment
Score your organisation across six AI maturity dimensions in about ten minutes. Get a per-category next move calibrated to where you actually are today.
- Hash visualization tool
Visual, educational walkthrough of cryptographic hash functions, see how the same input collapses into a hash and how avalanche behaves.
- Secure password generator
Generate strong passwords from your browser's cryptographic randomness, with a live entropy and strength read. No signup, nothing leaves your device.
- AI password generator
Builds memorable passphrase-style passwords (pattern, phrase, or hybrid) with a strength meter. A friendlier alternative to random strings.
- SaaS metrics calculator
ARR, MRR, churn, LTV, CAC payback, the numbers every B2B SaaS operator has to know cold.
- Cybersecurity tools index
A curated map of the tools I reach for across pen-testing, SIEM, IAM, and AppSec.
- Tool comparisons portal
Hands-on comparisons of tools I've actually run in production. No affiliate noise.
- Research Hub
Original analysis on CIAM, AI security, and the markets shaping them. Working research, updated as the picture sharpens.
Checklists & reading
- Personal security & privacy checklist (2025)
Password hygiene, 2FA, device, browser, social, financial. The list I'd give a non-technical family member.
- Passwordless authentication implementation checklist
Step-by-step rollout sheet for moving an existing CIAM stack to passkeys and WebAuthn.
- Passwordless authentication solution selection matrix
Side-by-side criteria for picking a passwordless vendor, scored on coverage, UX, and total cost.
- Digital identity & IAM glossary
Plain-language definitions for CIAM, IAM, OAuth, OIDC, SAML, JWT, passkeys, and the rest of the alphabet soup.
- Ultimate glossary of digital identity & IAM terms
Long-form glossary with full definitions, acronyms, and cross-references. Use this when the short glossary needs more depth.
- My essential DevOps tech stack
The tools I actually run to ship and operate B2B SaaS, organised by category and what each is best at.
- Free ebooks
Long-form guides, no email gate, no spam, no funnel.
- Editorial books directory
What each book actually teaches, and who it isn't for. Curated reading paths.
Looking for something else?
Try the cybersecurity resources map for canonical standards and primary sources, the reference guides for evergreen explainers, or the writing archive for long-form analysis.
More from Deepak Gupta
Every page on guptadeepak.com is hand-curated by Deepak Gupta. Pick a thread:
- About Deepak Gupta
Founder, cybersecurity architect, and writer at guptadeepak.com.
- My journey
From LoginRadius (2013, 1B+ users) to GrackerAI, in milestones.
- Publications & patents
Books, free e-books, a journal special issue, and five granted patents.
- Speaking
Conferences, podcasts, and interview appearances.
- Published & bylines
Bylines in Forbes, Entrepreneur, VentureBeat, HackerNoon, and DZone.
- Podcasts
Editorial directory of the podcasts I recommend and appear on.
- Research Hub
Curated research, buyer's guides, vendor comparisons, and technical deep-dives.
- All writing
Every essay, newest first.
- Newsletter
One short note when a new essay lands. No funnel.