# Crypto Hasher

> Protect & Optimize Your Website

Every tool and article on Crypto Hasher is free to use — no sign-up required. The links below are the primary, canonical resources on this site.

## Tools

- [Redirect Checker](https://safewebtools.xyz/tool/redirect-checker/): 7 Reasons Security-Conscious Users Keep a Redirect Checker in Their Toolkit You click a link. Your browser flashes through two, three, maybe five dif…
- [Open Graph Checker](https://safewebtools.xyz/tool/open-graph-checker/): What Exactly Is an Open Graph Checker, and Why Should I Care About It? When you paste a URL into Facebook, LinkedIn, or Slack, you expect a neat prev…
- [Sitemap Generator](https://safewebtools.xyz/tool/sitemap-generator/): The Sitemap Generator Myths That Are Quietly Hurting Your Site's Security Most webmasters treat a sitemap generator as a simple utility — punch in yo…
- [Robots.txt Checker](https://safewebtools.xyz/tool/robots-txt-checker/): What a Robots.txt Checker Actually Tells You (That Manual Review Misses) Security researchers and SEO auditors have a complicated relationship with…
- [Whois Lookup](https://safewebtools.xyz/tool/whois-lookup/): So, What Even Is a Whois Lookup? Imagine every website on the internet is like a house. Now imagine there's a giant public registry — like a neighbor…
- [DNS Lookup](https://safewebtools.xyz/tool/dns-lookup/): The Digital Paper Trail You Never Knew You Were Leaving Every time you type a web address into your browser, something happens before you ever see a …
- [HTTP Header Checker](https://safewebtools.xyz/tool/http-header-checker/): Why I Started Checking HTTP Headers on Every Site I Build I used to think HTTP headers were something only senior backend engineers worried about. Th…
- [Website Speed Test](https://safewebtools.xyz/tool/website-speed-test/): Website Speed Test Tools: How They Actually Stack Up Against Each Other If you've ever stared at a loading spinner longer than three seconds, you've …
- [Password Strength Tester](https://safewebtools.xyz/tool/password-strength-tester/): Why Your Password Is Probably Weaker Than You Think Most people believe their passwords are reasonably secure. They added a capital letter. Threw in …
- [SSL Certificate Checker](https://safewebtools.xyz/tool/ssl-certificate-checker/): What an SSL Certificate Checker Actually Does for You Every time someone visits your website over HTTPS, their browser quietly verifies a small digit…
- [AES Text Encryptor / Decryptor](https://safewebtools.xyz/tool/aes-text-encryptor/): Free browser-based AES-256-GCM text encryptor and decryptor. Uses PBKDF2 key derivation and Web Crypto API — nothing uploaded, all encryption runs cl…
- [Hash Generator (MD5, SHA-1, SHA-256, SHA-512)](https://safewebtools.xyz/tool/hash-generator/): Free online hash generator — compute MD5, SHA-1, SHA-256, and SHA-512 hashes of text or files instantly. Works offline in the browser. Copy any diges…
- [TOTP / 2FA Code Generator](https://safewebtools.xyz/tool/totp-2fa-generator/): Free browser-based TOTP 2FA code generator. Paste your secret key and see live 6-digit codes refresh every 30 seconds. No server, no tracking, 100% o…
- [Password Strength Analyzer](https://safewebtools.xyz/tool/password-strength-analyzer/): Free offline Password Strength Analyzer. Get entropy score, estimated crack time, and pattern weakness detection — your password never leaves your br…
- [Secure Password & Passphrase Generator](https://safewebtools.xyz/tool/password-passphrase-generator/): Free browser-based password and passphrase generator using CSPRNG. Configure length, symbols, word count, and separators. Entropy displayed. Nothing …
- [Bcrypt Hash Generator & Verifier](https://safewebtools.xyz/tool/bcrypt-hash-tool/): Free browser-based bcrypt hash generator and verifier. Set cost factor 4–16, generate $2b$ hashes, and check passwords against existing hashes — no s…
- [RSA Key Pair Generator](https://safewebtools.xyz/tool/rsa-keypair-generator/): Free browser-based RSA key pair generator. Create 2048-bit or 4096-bit RSA public/private keys in PEM format instantly. No server upload — 100% local…
- [Base64 Encoder / Decoder](https://safewebtools.xyz/tool/base64-encoder-decoder/): Free browser-based Base64 encoder and decoder. Supports standard Base64, URL-safe variant, and file uploads. No data leaves your device — encode toke…
- [HMAC Signature Generator](https://safewebtools.xyz/tool/hmac-generator/): Free browser-based HMAC generator. Compute HMAC-SHA-256/384/512 signatures from a message and secret key to authenticate webhooks and API payloads. 1…
- [2FA Backup Code Generator](https://safewebtools.xyz/tool/2fa-backup-code-generator/): Generate cryptographically secure 2FA backup recovery codes in alphanumeric, numeric, or hex format. Print or save them offline to avoid account lock…
- [File Checksum Verifier](https://safewebtools.xyz/tool/file-checksum-verifier/): Free browser-based file checksum verifier. Drag in any file to compute SHA-256, SHA-1, or MD5 hash and compare against a published value. 100% local,…
- [QR Code Generator for 2FA Secrets](https://safewebtools.xyz/tool/2fa-qr-code-generator/): Free offline QR code generator for 2FA TOTP secrets. Paste your Base32 secret or otpauth:// URL and instantly create a scannable code for Google Auth…

## Articles

- [Get a Foreign Business Number Online Fast: g100.us](https://safewebtools.xyz/foreign-business-number-online-g100us/): Get a foreign business number online in seconds with g100.us — calls, SMS & WhatsApp on one number, 100+ countries, flat pricing, no contracts.
- [Get a WhatsApp Number Without a SIM Card: g100.us Guide](https://safewebtools.xyz/whatsapp-number-without-sim-g100us/): Get a WhatsApp number without a SIM card in minutes using g100.us. Step-by-step setup, pricing, and why it beats buying a physical SIM.
- [What to Do the Moment You Realize Your Password Was Leaked](https://safewebtools.xyz/password-leaked-what-to-do/): Password leaked? Follow this rapid response checklist: verify on HaveIBeenPwned, rotate reused credentials, kill sessions, enable 2FA, and protect yo…
- [Choosing a Hash Algorithm: MD5, SHA-1, SHA-256 and Beyond](https://safewebtools.xyz/choosing-hash-algorithm/): MD5 and SHA-1 are broken for security use. Learn which hash algorithms are safe, when to use SHA-256, and why password storage requires Argon2id or b…
- [Understanding Public-Key Cryptography Without the Math](https://safewebtools.xyz/public-key-cryptography-explained/): Understand public-key cryptography, RSA, digital signatures, and HTTPS trust chains through a simple locked-mailbox analogy. No math required.
- [How to Set Up 2FA on Every Account in One Afternoon](https://safewebtools.xyz/set-up-2fa-every-account/): It often takes a scare to get serious about two-factor authentication. A reused password turns up in a credential dump from some forgotten forum brea…
- [What Is Bcrypt and Why Is It Still the Go-To for Passwords?](https://safewebtools.xyz/what-is-bcrypt-password-hashing/): Why bcrypt still works in 2026: adaptive cost factor, automatic salting, GPU resistance, and how it fits alongside 2FA in a real security stack.
- [7 Password Myths That Are Putting You at Risk](https://safewebtools.xyz/password-myths-debunked/): NIST-backed truth vs. outdated password myths: why 90-day rotations backfire, why length beats complexity, and why SMS 2FA isn't good enough anymore.
- [SMS 2FA vs. Authenticator Apps vs. Hardware Keys](https://safewebtools.xyz/sms-vs-app-vs-hardware-2fa/): SMS 2FA vs authenticator apps vs hardware keys: an honest comparison of security strength, phishing resistance, SIM swap risk, and real-world conveni…
- [Salt, Pepper, and Why Your Password Hash Needs Both](https://safewebtools.xyz/salt-pepper-password-hashing/): Learn how password salting defeats rainbow tables and why peppering adds a second layer of protection — with the exact storage architecture each requ…
- [Why You Should Never Store Passwords in Plain Text](https://safewebtools.xyz/never-store-passwords-plaintext/): Real breach case studies — Adobe, RockYou, LinkedIn — show why plaintext password storage destroys users. Learn how bcrypt and Argon2 salted hashing …
- [A Beginner's Guide to AES Encryption](https://safewebtools.xyz/beginner-guide-aes-encryption/): Learn how AES encryption works in plain English — symmetric keys, block ciphers, GCM mode, and why AES-256 is trusted everywhere from banks to WhatsA…
- [How TOTP Two-Factor Codes Actually Work Under the Hood](https://safewebtools.xyz/how-totp-2fa-codes-work/): How TOTP 2FA codes work: RFC 6238 explained — shared secret, 30-second Unix time windows, HMAC-SHA1, and dynamic truncation in plain detail.
- [Hashing vs. Encryption: What's the Real Difference?](https://safewebtools.xyz/hashing-vs-encryption-difference/): Hashing vs encryption: learn the real difference, why it matters for password storage, and how 2FA fits in — with analogies that finally make it clic…

## About & Policies

- [About Us](https://safewebtools.xyz/about-us/)
- [Contact Us](https://safewebtools.xyz/contact-us/)
- [Terms of Service](https://safewebtools.xyz/terms-of-service/)
- [Disclaimer](https://safewebtools.xyz/disclaimer/)
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## Notes

- Full URL list: https://safewebtools.xyz/sitemap.xml
- Content is original and maintained by Crypto Hasher. Attribution is appreciated when cited.