Free Tools Blog — Guides, Tips & How-Tos

seo

How to Generate Meta Tags Online — Title, Description and Open Graph Guide

Learn how to generate SEO meta tags, write better title tags and descriptions, and prepare Open Graph tags for social previews.

2026-07-05

seo

Learn how keyword density works, when to check it, and why natural keyword usage matters more than hitting a fixed percentage.

2026-07-05

seo

Learn how to check title tag length, avoid truncation, and write SEO titles that are clear, specific and click-worthy.

2026-07-05

seo

Learn how robots.txt works, how to create crawl rules, when to use Disallow, and why robots.txt is not a privacy tool.

2026-07-05

seo

Learn how XML sitemaps work, what fields matter, and how to generate a sitemap for important website URLs.

2026-07-05

developer

Learn how to format and validate JSON online, fix common syntax errors, and choose between beautified and minified JSON.

2026-07-04

text

Learn how Base64 encoding works, when to use it, how to decode it, and why Base64 is not encryption.

2026-07-04

developer

Learn how JWT tokens work, how to decode their header and payload, and why signature verification requires a key.

2026-07-04

developer

Learn what UUIDs are, when to use them, and how UUID v4 helps create unique identifiers for apps and databases.

2026-07-04

developer

Learn how to test regex patterns online, debug matches, understand escaping, and avoid common regular expression mistakes.

2026-07-04

developer

Learn how Unix timestamps work, how to convert epoch time to dates, and how to avoid seconds vs milliseconds and timezone mistakes.

2026-07-04

developer

Learn how hash generators work, when to use MD5, SHA-1, SHA-256 or SHA-512, and why hashing is different from encryption.

2026-07-04