How To

Building MCP-Compliant AI Agents: A Developer's Handbook

The rise of AI agents has ushered in a new era of autonomous software, capable of planning and executing multi-step tasks. However, the true power of...

How to Compare Two Texts and Find the Difference

Compare two texts online to find every difference instantly. Learn line vs word diff, how diff algorithms work, and how to read a diff with real examples.

How to Convert a HEX Color to RGB (and HSL)

To convert a HEX color to RGB, split the 6 digits into three pairs and convert each pair from base-16 to decimal. Here's the math, examples, and a free tool.

How to Convert a Unix Timestamp to a Date

To convert a Unix timestamp to a date, multiply seconds by 1000 and feed it to a date function. Covers JS, Python, SQL, UTC vs local, ISO 8601, and 2038.

How to Count Words & Characters in Text Online

To count words and characters online, paste your text into a free word counter. It instantly shows words, characters, sentences, and reading time.

How to Encode and Decode Base64 Online (Free Guide)

Encode and decode Base64 instantly online: paste your text, click, and copy the result. Learn how Base64 works, URL-safe variants, and why it isn't encryption.

How to Format and Beautify JSON Online (Free)

To format JSON online, paste it into a free in-browser formatter and click Format. Learn to beautify, minify, validate, and fix JSON errors.

How to Generate a Strong, Secure Password (2026)

Generate a strong, secure password by using 16+ random characters or a 4-5 word passphrase. Learn the entropy math, password managers, 2FA, and how passwords get cracked.

How to Generate a UUID (v4, v1, v7) — Full Guide

Learn how to generate a UUID in seconds. Covers UUID versions (v4, v1, v7), collision odds, UUID vs auto-increment IDs, and code for JS, Python, and SQL.

How to Generate an MD5 or SHA-256 Hash Online

Generate an MD5, SHA-1, or SHA-256 hash online by pasting text or a file into a free in-browser tool. Learn the differences and how to verify checksums.

How to URL Encode and Decode a String

To URL encode a string, replace unsafe characters with percent-codes (a space becomes %20); to decode, reverse it. Here is exactly which characters to encode.

Best MCP Server Categories for Developer Workflows

MCP servers are one of the most useful building blocks in modern AI tooling because they let models interact with real systems through structured tools...

Build an MCP Server in Python for Claude Code

Building an MCP server in Python for Claude Code is mostly a matter of defining a few safe tools, running them over stdio, and registering the server...

What Is MCP? Model Context Protocol for Beginners

Model Context Protocol MCP is an open protocol that lets AI applications connect to external tools, data sources, and services through a standard...

Best Free Online Games You Can Play Without Downloading (2026)

Play 109 free online games instantly in your browser — no download, no sign-up, no paywall. The best puzzle, card, strategy, word, and arcade games, tested on desktop and mobile.

How to Install MCP Servers in Claude Code (Step-by-Step)

Install MCP servers in Claude Code in under 2 minutes with the claude mcp add command. Covers local, project, and user scopes, .mcp.json, remote servers, and troubleshooting.

Best Free AI Tools in 2026 (No Signup Required)

Discover 24+ best free AI tools in 2026 that require no signup. Categorized roundup covering writing, career, creative, and fun AI tools.

How to Convert CSV to JSON Online Free

Learn how to convert CSV files to JSON format online for free. Step-by-step guide covering CSV format rules, common errors, and bulk conversion tips.

How to Create Cron Expressions (Crontab Guide with Examples)

Learn cron expression syntax with examples. Complete crontab guide covering common schedules, pitfalls, timezone handling, and how to test cron jobs.

How to Decode a JWT Token (Without a Library)

Learn how to decode JWT tokens and understand their structure. Covers header, payload, signature, security tips, and common debugging techniques.

How to Write a Cover Letter with AI (2026 Guide)

Learn how to write a compelling cover letter using AI. Step-by-step guide covering structure, tone, what hiring managers look for, and common mistakes.

How to Create a QR Code Online Free (No Signup)

Generate QR codes for URLs, text, WiFi, and more — free, instant, and downloadable as PNG. Step-by-step guide with examples for 2026.

How to Test Regex Online (with Live Matching & Debugging)

Learn how to test and debug regular expressions online. Covers common regex patterns, flags, capture groups, and real-time match highlighting.

How to Write a Resume with AI in 2026 (Beat the ATS)

Step-by-step guide to using AI to tailor your resume for any job. Learn how ATS systems work and how to optimize your resume to pass automated screening.