Email obfuscation playground
Compare email obfuscation methods for websites, generate copyable HTML or JavaScript snippets, and weigh human usability against basic scraper resistance.
Specific calculators, planners, and explainers for jobs that usually get buried in forums.
HTML-first, no account wall
Shareable URLs and direct outputs
Topic hub
Linux and sysadmin tools
Interactive tools for Linux operations, sysadmin debugging, SSH, rsync, Nginx, systemd scheduling, and adjacent hardware-fit questions.
This cluster is for practical infrastructure work: SSH jumps, rsync rules, Nginx matching, systemd timers, and hardware planning that usually sends people into man pages.
Tools in this cluster
LLM VRAM and context calculator
Estimate LLM VRAM needs from parameter count, quantization, KV-cache precision, context length, concurrency, GPU count, and partial offload, with architecture-aware fit checks.
Nginx location match explorer
Debug Nginx location precedence with an interactive explorer that shows exact matches, longest-prefix memory, regex order, and ^~ short-circuiting.
Rsync include/exclude rule explorer
Debug rsync include and exclude filters with an interactive explorer that shows first-match order, wildcard matching, and parent-directory traversal blockers.
SSH tunnel and jump-host builder
Build SSH commands and reusable ~/.ssh/config blocks for jump hosts, local forwards, remote forwards, and dynamic SOCKS tunnels.
Solar charge controller sizer
Size a solar charge controller using panel Voc, Vmp, Isc, temperature coefficient, stringing, battery voltage, and controller limits, with cold-weather voltage checks and MPPT-versus-PWM guidance.
Systemd timer builder
Build matching systemd service and timer units for recurring Linux jobs, with calendar or monotonic schedules, install commands, and directive explanations.
USB-C cable checker
Check whether a USB-C cable is suitable for charging, data, video, or dock use based on wattage, data rate, and display requirements.
Recent launch notes
Launched a solar charge controller sizer with cold-weather Voc checks, series-string fit, and battery charge-current planning
Added a solar sizing tool that checks controller voltage and current limits against panel specs, cold weather, battery voltage, and series-parallel stringing, then suggests a safer controller class.
Launched an LLM VRAM and context calculator for weights, KV cache, offload planning, and fit checks
Added an architecture-aware LLM VRAM and context calculator that breaks memory into weights, KV cache, GPU offload share, runtime overhead, and context or concurrency limits.
Launched an rsync include/exclude rule explorer for filter order, parent-directory traversal, and skipped-file debugging
Added an interactive rsync include/exclude rule explorer that evaluates filter order, shows which rule matched each sample path, and explains when a parent directory rule stops rsync reaching a file at all.