Developer Tools

Generate SSL/TLS renewal and auto-renewal commands for 8 ACME clients (certbot, acme.sh, lego, dehydrated, Caddy, cert-manager, win-acme, Posh-ACME) with HTTP-01 and DNS-01 across 12 DNS providers, plus an expiry calculator...

Generate a secure CORS policy from presets or custom options and copy ready-to-paste configuration for 14 stacks: Nginx, Apache, Express, Node, FastAPI, Flask, Django, ASP.NET Core, Spring Boot, Caddy, Traefik,...

Free dd command generator. Build commands to write an ISO to USB, image a disk, wipe a drive or create a test file, with block size, count, conv flags and...

Free SSH tunnel generator. Build local (-L), remote (-R) and dynamic SOCKS (-D) port-forwarding commands with jump host, identity file and keepalive, and copy both the ssh command and an...

Free sed command generator. Substitute text, delete lines, print a range or insert content with line addressing, global and ignore-case flags, and safe in-place editing. Live command with every part...

Free systemd service file generator. Fill in ExecStart, Type, User, Restart and Environment to get a complete .service unit plus install commands, and enable the optional .timer to schedule it...

Free rsync command generator. Build local copies, backups and SSH push/pull transfers with archive, compress, delete, dry-run, exclude and progress options. Live command, per-flag explanation and a destructive-action warning. Runs...

Free find command generator. Search by name, type, size, age and run print, -ls, -delete or -exec, with a live command, per-flag explanation and a warning on destructive actions. Runs...

Free tar command generator. Pick the operation (create, extract, list, append) and compression (gzip, bzip2, xz, zstd), toggle options, and copy a working command with every flag explained. Runs entirely...

Free visual chmod calculator. Click read, write and execute for owner, group and other to get the octal value, symbolic rwx string and ready-to-run chmod command. Reverse from octal, setuid/setgid/sticky...