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Guides, tips, and how-tos for getting the most out of free online tools.
10 articles
How to Create a WiFi QR Code for Your Restaurant or Business
Learn how to create a QR code for your WiFi password so guests can connect instantly. Step-by-step guide for restaurants, cafes, Airbnbs, and small businesses.
How to Convert JSON to CSV (and Back)
Learn how to convert JSON to CSV and CSV to JSON. Covers nested objects, different delimiters, edge cases, and code examples.
Unix Timestamp Explained: A Developer's Quick Reference
What is epoch time, why Unix timestamps matter, conversions in JS/Python/PHP, the Y2K38 problem, and when to use timestamps vs ISO dates.
How to Convert Text Case Online — The Complete Guide
Learn about uppercase, lowercase, title case, camelCase, snake_case, kebab-case, and when to use each in writing and code.
How to Use Regex: A Beginner's Guide to Regular Expressions
Learn regular expressions from scratch — syntax, character classes, quantifiers, groups, flags, and real-world examples.
How to Create a Favicon for Your Website (All Sizes + Code)
Everything you need to know about favicons: recommended sizes, formats, HTML code, web app manifests, and testing tips.
How to Compress a PDF Without Losing Quality
Learn the best techniques to reduce PDF file size while keeping your documents sharp and readable.
5 Free Developer Tools Every Programmer Needs in 2026
Discover the essential free developer tools for formatting JSON, testing regex, encoding Base64, decoding JWTs, and comparing text diffs.
7 Best Free PDF Tools That Don't Upload Your Files (2026)
Compare the best free PDF tools that keep your files private. Merge, split, compress, and convert PDFs without uploading to any server.
How to Write a Privacy Policy for Your Website in 2026
A step-by-step guide to creating a GDPR and CCPA compliant privacy policy for your website or app.