developer & it
Developer & IT
Free developer and IT utilities that run in the browser. Debug headers and DNS, decode JWTs and base64, format JSON, generate hashes and UUIDs, and calculate subnets — no signup, no upload, no logging.
23 tools · out of 58 total
popular
Password Checker
Strength score, crack time, AI suggestions.
inasec.app/password
Uptime Checker
Is any website up or down right now?
inasec.app/uptime
IP Lookup
Your IP, ISP, location, and VPN detection.
inasec.app/ip-lookup
DNS Lookup
Query A, MX, CNAME, TXT, NS records over HTTPS.
inasec.app/dns-lookup
HTTP Headers
See response headers, status, redirects, CORS.
inasec.app/http-headers
Port Checker
Check if any TCP port is open on a host.
inasec.app/port-checker
CIDR Calculator
Subnet math: network, broadcast, host range.
inasec.app/cidr
JSON Formatter
Format, validate, and color-code any JSON.
inasec.app/json-formatter
Base64
Encode and decode base64. Handles UTF-8.
inasec.app/base64
Hash Generator
MD5, SHA-1, SHA-256, SHA-512 in your browser.
inasec.app/hash
Word Counter
Words, characters, readability, and more.
inasec.app/wordcount
UUID Generator
Generate v4 and v7 UUIDs in your browser.
inasec.app/uuid
Diff Checker
Compare two texts line by line with LCS.
inasec.app/diff
Cron Builder
Build cron expressions, see next 5 run times.
inasec.app/cron
Markdown Previewer
Live GitHub-flavored markdown rendering.
inasec.app/markdown
JWT Decoder
Inspect header, payload, and signature.
inasec.app/jwt
Regex Tester
Test patterns with live highlighted matches.
inasec.app/regex
Lorem Ipsum
Lorem, hipster, and corporate placeholder text.
inasec.app/lorem
CSS Gradient
Build linear or radial gradients with stops.
inasec.app/css-gradient
Box Shadow
Layer up to 4 shadows with live preview.
inasec.app/box-shadow
Border Radius
Round any corners independently or linked.
inasec.app/border-radius
Image Color Picker
Sample colors from any uploaded image.
inasec.app/image-color
popular
Image Converter
Convert PNG, JPG, WEBP with resize and quality.
inasec.app/image-convert