A maintained toolbox you can use every day
Skyjila is a free collection of browser tools for developers, designers, and makers. Format JSON and CSV, sketch Mermaid and sequence diagrams, check color contrast, build API requests, and convert everyday encodings — without creating an account or uploading private drafts to a mystery server.
Each tool is a real workspace: paste or open a file, edit in place, then copy, save, or export. Recent tools stay one click away on this home page so you can return to unfinished work quickly.
What you will find
- Data — JSON formatter, validator, diff, tree view, XML, YAML ↔ JSON, CSV tools, and text diff
- Web — HTML viewer, playground, Markdown preview, URL parser, SVG viewer, and QR codes
- Design — color picker, contrast checker, gradients, wireframes, prototypes, mobile flows, journey maps, and sitemap drafting
- Diagrams — freeform diagrams, mind maps, flowcharts, class/ER/architecture diagrams, Mermaid, and sequence diagrams
- Dev — JWT, regex, timestamps, cron, UUID, Base64, URL encoding, and an API request builder
- Plan — a lightweight kanban board for quick task columns
How Skyjila is different
Tools are curated and kept in one consistent product shell, not scattered one-off demos. Interfaces stay simple, exports are practical, and privacy-minded defaults keep work on your device whenever the browser can do the job locally.
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Start here
Search above for a task, browse a category filter, or open About to learn who runs Skyjila. For support or privacy questions, use Contact.