Guides & tutorials
Practical how-tos for the tools above. Short, no fluff.
How to Validate and Format JSON in Seconds
Paste, click, done. Plus how to read the exact line of a syntax error.
SaaS ROI: Know Your ROAS Before Spending on Ads
The 4 numbers that tell you if a campaign will make money — before you launch it.
How to Compress Images Without Losing Quality
Quality vs. file size, JPEG vs. WebP, and the 80% rule that covers most cases.
Base64 Encoding Explained: Encode and Decode in Seconds
What Base64 is, when you need it, and how to convert in one click.
How to Generate a Strong Password
Entropy, crack times, and why length beats complexity.
Audio Bitrate Explained: 64 vs 128 vs 320 kbps
What bitrate actually means, when 128 kbps is enough, and why WAV runs at 1411 kbps.
JPEG vs PNG vs WebP vs SVG: Which Format Should You Use?
The 10-second decision tree for picking the right image format every time.
10 Free Online Tools Every Developer Should Bookmark
The daily web chores that break your flow — all in one place, no sign-up.
MP3 vs. WAV: When to Convert (And How)
Which format for which job, and how to convert in one click.
Passkeys Explained: The Password Replacement That Logs You In With Your Face or Fingerprint
How passkeys work, why phishing stops working, and what happens if you lose your phone.
AVIF Explained: Smaller Images, Same Quality — Should You Switch?
Where the newest image format wins, where it doesn't, and when to stick with WebP.
How to Trim Audio in Your Browser (No App Needed)
Cut silence, mistakes, and clips in seconds — WAV for editing, MP3 for sharing.