Chmod Calculator
Convert Unix permissions between numeric and symbolic formats — 755 is rwxr-xr-x. Bit visualization, special bits (setuid/setgid/sticky), common presets.
Convert Permissions →Unix Timestamp →Epoch Days
1717673322. That's Jun 6 2024 14:08:42 UTC. Paste it in. Get the date. No date -d, no timezone math, no Google.
Cron Frequency →Monthly Load
Every minute = 43,200/month. */5 * * * * = 8,640/month. Run the tally before your CI bill blows through the project budget cap.
Base64 Payload Inflation: +33%
12 MB binary →16 MB Base64. Every embedded asset in your JSON API just gained 33%. Multiply that across 10,000 API responses and your bandwidth bill notices.
Measure Inflation →IPv4 CIDR →Subnet Bitmask
CIDR prefix in. Subnet mask out. /24 = 256 IPs, 254 usable. /16 = 65,536 IPs. Know your mask cold before you carve up the VPC into /22s.
Decode CIDR →UUID v4 Collision Probability
100 billion UUIDv4s = 2.7×10⁻ ?collision probability. That's one collision every 370 quadrillion generations. The birthday paradox, quantified —run it yourself.
Estimate Collision →