All Tools

Calculate the tip amount, total bill, and per-person share instantly. Supports custom tip percentages and bill splitting. Free online tip calculator.

Paste your text and instantly calculate the estimated reading time. Based on 200–250 WPM average reading speed. Free online reading time estimator.

Create professional invoices online for free. Add items, taxes, discounts, and download as PDF. No account needed. Free invoice maker for freelancers and small business.

Build cron expressions visually with a point-and-click interface. Validate, explain, and preview the next 10 run times. Free cron job generator, no signup needed.

Convert any JSON object to TypeScript interfaces instantly. Supports nested objects, arrays, optional fields, and type inference. Free, browser-based.

Look up any IP address to find its country, city, ISP, organization, and geolocation. Check your own IP or investigate any address. Free, no signup required.

Convert HTML to clean Markdown instantly. Supports headings, links, tables, code blocks, images, and lists. Free HTML to Markdown converter, no signup required.

Convert Markdown to HTML instantly with a live preview. Supports GFM, tables, code highlighting, and custom CSS. Free Markdown to HTML converter.

Complete HTTP status code reference with explanations, examples, and when to use each code. Search by code or name. Free developer reference tool.

Complete Linux command reference with examples, flags, and explanations. Search 200+ commands by name or category. Free Linux cheat sheet for beginners and pros.

Interactive Bash scripting reference with variables, loops, conditions, functions, arrays, and string operations. Searchable examples. Free, no signup required.

Complete Git command reference with examples. Covers init, clone, commit, branch, merge, rebase, stash, and more. Interactive Git cheat sheet, free, no signup.

Complete Vim cheat sheet with modes, motions, commands, registers, macros, and configuration. For beginners to advanced. Free interactive Vim reference.

Complete Docker reference: containers, images, volumes, networks, Dockerfile, and Docker Compose. All commands with examples. Free Docker cheat sheet.

Generate Nginx server block configs for static sites, reverse proxy, Node.js, PHP, SSL, and more. Visual builder with instant output. Free, no signup required.

Interactive guide to generating SSH keys (RSA, Ed25519, ECDSA). Shows exact commands, explains each option, and helps you add keys to servers and GitHub.

Calculate Linux file permissions visually. Convert between symbolic (rwxr-xr-x) and octal (755) notation. Generate chmod commands instantly. Free, no signup.

Complete systemd and systemctl command reference. Start, stop, enable, check status, view logs with journalctl, write unit files. Free Linux sysadmin reference.

Interactive reference for grep, awk, and sed with practical examples. Search, filter, transform text files in Linux. Free cheat sheet for developers and sysadmins.

Complete curl command reference for API testing, file downloads, headers, authentication, and more. Interactive curl cheat sheet with copy-ready examples. Free.