How-tos for the tools you actually use
Plain-English walkthroughs — no fluff, no sign-up. Every guide links straight to the free tool that does the job.
How to merge PDF files
To merge PDF files, drop them into the free Merge PDF tool, drag them into the order you want, and downl...
How to compress a PDF
To compress a PDF, upload it to the free Compress PDF tool, choose a level — Smaller, Recommended, or Hi...
How to convert JPG to PDF
To convert a JPG to PDF, drop your image into the free JPG to PDF tool and download the PDF — or add sev...
How to convert PDF to JPG
To convert a PDF to JPG, drop it into the free PDF to JPG tool, choose a quality — Standard or High — an...
How to compress images for the web
To compress an image for the web, drop it into the free Compress Image tool and either pick a preset — S...
WebP vs JPG vs PNG vs AVIF
Quick answer: for most web images in 2026, use WebP — it's 25–35% smaller than JPG, looks identical, and...
How to create a strong password
The single thing that makes a password strong is length — a long passphrase like four or five random wor...
What's inside a JWT
A JWT (JSON Web Token) is three Base64URL-encoded parts joined by dots: header.payload.signature. The bi...
Regex cheat sheet
This is the regex reference you keep open while you work: the syntax that comes up daily, a set of copy-...
Cron syntax explained
A cron expression is five fields separated by spaces that tell a server when to run a job: minute, hour,...