About SWE Helper
Free tools and resources built by a developer, for developers.
The Story
SWE Helper started from a simple frustration — every time I needed a quick developer tool (format some JSON, decode a JWT, test a regex), I'd end up on a site plastered with ads that sent my data to unknown servers. I wanted something better: fast, private, and free.
So I built it. What started as a handful of tools has grown into a collection of 118+ browser-based developer tools and 145+ system design articles — all running entirely in your browser with zero data sent to any server.
About the Creator
Hi, I'm Dhawal— a software engineer with 6+ years of experience in full-stack product development. I'm passionate about building tools that make developers' lives easier and sharing knowledge about system design and software engineering.
Our Philosophy
Privacy First
Every tool runs in your browser. Your data never touches a server.
Speed Matters
No round-trips, no loading spinners. Instant results, every time.
Always Free
No paywalls, no premium tiers, no signup required. Ever.
Learn by Doing
Tools and articles designed to help you understand concepts hands-on.
By the Numbers
Ready to explore?