Security & Hardware
Chmod permissions, subnet mask, hash generator, card validator, and hardware diagnostic tools
Responsive 728x90 / 320x100 Ad Slot
(CLS Prevention Active 路 Zero Shift)Available Tools (12)
Linux Chmod Permissions Calculator (Octal & Symbolic)
Interactive octal and symbolic permission calculator for Linux chmod commands.
IPv4 Subnet Mask & CIDR Range Calculator
Calculate subnet mask, network address, broadcast address, and usable host IP ranges with CIDR prefixes.
Cryptographic Hash & HMAC Signature Generator (SHA-256 路 SHA-512)
Compute hardware-accelerated SHA-256, SHA-512 hashes and keyed HMAC message authentication signatures.
Credit Card Validator (Luhn Algorithm & Test Card Generator)
Validate card checksums with the Luhn algorithm, detect card issuer BINs, and generate test card numbers.
Real-Time Typing Speed (WPM/CPM) & Accuracy Test
Measure typing speed in CPM and WPM with live accuracy percentage, typo penalties, and scorecards.
Screen Resolution, Dead Pixels & Keyboard Tester
Full-screen dead pixel diagnostic and hardware resolution check paired with live N-Key Rollover keyboard matrix testing.
CPS Click Speed & Reaction Bench
Test clicks-per-second (CPS) over 1s, 5s, 10s and measure visual reaction time in milliseconds with gamer tiers.
Webcam, Mic & Stereo Speaker Hardware Check
Pre-meeting hardware diagnostics testing webcam resolution, microphone VU loudness with 3-second playback, and isolated stereo speakers.
.env Formatter & Safe .env.example Masker
Format and sort .env files alphabetically, detect duplicate keys, and generate sanitized .env.example templates.
Cryptographic JWT Secret Key Generator
Generate high-entropy cryptographic secret keys for HS256, HS384, and HS512 HMAC token signing in Hex and Base64.
Base32, Base58, Hex & UTF-8 Multi-Encoder
Cross-encode and decode between Bitcoin Base58, 2FA Base32, Hexadecimal byte dumps, and UTF-8 strings.
Email SPF & DMARC Record Builder
Build compliant DNS TXT records for SPF and DMARC to prevent spam foldering and domain spoofing on Gmail and Yahoo.
Wide Responsive Banner
(CLS Prevention Active 路 Zero Shift)