Your digital toolbox
D4rC Tools
Secure access, strong passwords, clean data and quick sharing. The tools you need – without the clutter.
- No database
- No tracking
- Auto-expiring pastes
All tools
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Sharing
Secure Share
Share secrets and files end-to-end encrypted. The key never leaves your browser.
AES-256-GCMZero-KnowledgeOne-time -
Sharing
No-Paste
Share code and text via link. Expires automatically, syntax highlighting included.
Share linkExpiryHighlight -
Security
Password Generator
Strong passwords, passphrases and PINs with entropy rating. Generated in your browser.
PassphrasesCSPRNGEntropy -
Security
Password Check
Calculate entropy and strength locally and check against Have I Been Pwned via k-anonymity.
EntropyHIBPCrack time -
Network
My IP
Your public IPv4/IPv6 address, hostname and approximate location – plus the d4rc.net IP API docs.
IPv4 · IPv6Reverse DNSAPI -
Security
Security & Crypto
Decode and verify JWTs, generate TOTP codes, inspect certificates, create CSRs and fingerprint SSH keys – all locally.
JWTTOTPX.509SSH -
Security
.htaccess Generator
Protect directories with password hashes and IP filters for LiteSpeed and Apache.
bcryptIP filterApache 2.4 -
Security
Text Hash
Hash any text with digests, HMAC and password hashes – and verify existing hashes.
SHA-2/3bcryptArgon2id -
Development
Random Hashes
Generate up to 100 random test hashes at once. Copy individually or export.
MD5SHA-256Batch -
Development
Base64 Converter
Encode and decode text, files and images. Data URI, CSS, HTML and more output formats.
Data URIImagesUTF-8 -
Development
JSON Tool
Validate, format, minify and explore JSON in an interactive tree view.
ViewerFormatValidate -
Design
Color Picker
Pick colors directly on the page, convert formats, build palettes and check contrast.
HEX · RGB · HSLOKLCHWCAG -
Design
Lock Pattern
Draw Android-style unlock patterns and export them as PNG for documentation.
3×3 · 4×4 · 5×5PNGArrows -
Network
Network Tools
Subnet and CIDR calculator, IP converter, MAC vendor lookup and a port reference – fully offline.
IPv4 · IPv6CIDRMACPorts -
Server
Linux Tools
chmod calculator, cron explainer, systemd units, command builders, fstab and logrotate generators.
chmodCronsystemdfstab -
Server
Docker Tools
Convert docker run to Compose, build and validate compose.yaml, plus volume, resource and Dockerfile generators.
ComposeDockerfileVolumesLimits -
Server
Web Tools
Analyze security headers and CSP, generate CORS and robots.txt, look up MIME types and status codes, size PHP upload limits.
HeadersCSPCORSrobots.txt -
Development
Developer Tools
Regex, text diff, case conversion, encoding, local QR codes, SemVer and line processing.
RegexDiffQRSemVer -
Server
Admin Calculators
Unix time, date differences, transfer times, SI vs. IEC, storage growth, RAID capacity and backup retention.
Unix TimeRAIDBackupGiB -
Resources
Toolbox
Downloads with checksum, file size and counter. Protected files require a password.
SHA-256ProtectedCounter -
Resources
Useful Links
A curated collection of handy services for security, network, development and servers.
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