About space4.dev

space4.dev is a free catalog of online developer tools built for people who need answers fast — without creating accounts or uploading sensitive payloads to unknown servers. We currently publish 75+ tools spanning JSON, encoding, JWT, date & time, and OpenAPI / Swagger workflows.

Our mission

Developers constantly paste API responses, tokens, and configs into “quick online tools.” Too many of those tools quietly send data to a backend. Our mission is the opposite: ship polished utilities that run entirely in your browser, stay free, and respect privacy by architecture — not by marketing copy alone.

How the tools work

Each tool is a static page with client-side JavaScript. When you paste JSON, Base64, a JWT, or an OpenAPI document, processing happens on your device. There is no account system and no server-side processing of tool input. That makes space4.dev suitable for staging secrets, internal API specs, and customer data you would never upload to a random SaaS.

• Free to use — no signup wall for core tools
• Client-side processing — input is not uploaded for conversion
• Fast static pages — built for search and sharing
• Grouped categories — jump from formatter to validator to viewer

Who we are

space4.dev is developed and maintained by Shreeji Softech, a software studio focused on practical developer products. We iterate in public: new tools ship as self-contained pages with documentation, FAQs, and related-tool links so the catalog stays useful as it grows.

Advertising & sustainability

The site may show advertisements (for example via Google AdSense) to help cover hosting and ongoing development. Ads do not change the privacy model of the tools themselves: your pasted input is still processed locally. See our Privacy Policy and Terms for details.

Feedback & tool ideas

Missing a utility your team needs every week? Tell us. Product ideas from real workflows help us prioritize the roadmap.