DevToolbox is built and maintained by JDApplications, a small development studio focused on creating free, high-quality developer tools. Our team has spent years working with data interchange formats, API development, encoding schemes, and developer workflows.
We've seen firsthand how often developers need quick, reliable tools — whether it's converting XML to JSON, formatting a messy API response, decoding a Base64 token, or encoding URL parameters. We built DevToolbox to solve those needs without the friction of registration, desktop installs, or data privacy concerns.
When we needed everyday developer utilities, the options were frustrating:
We wanted a suite of tools that work correctly, run entirely in the browser so no data ever leaves the user's machine, and cover the workflows developers actually use every day. That's what DevToolbox is, and we continue to expand it based on user feedback.
The converter is a client-side application built with modern web technologies. All XML parsing and JSON generation happens inside your browser tab using JavaScript — no data is sent to any backend server, database, or analytics service.
Server-side rendering for fast initial loads and SEO, with client-side interactivity for the converter tool. React's component model keeps the UI responsive even during large conversions.
A well-established XML parsing library with configurable attribute handling, array detection, and encoding support. We chose it for its reliability with edge cases like CDATA, namespaces, and deeply nested structures.
Utility-first CSS framework providing a responsive, accessible design that works across desktop, tablet, and mobile devices without compromising performance.
Deployed on Vercel's edge network for globally fast page loads. The static educational content is pre-rendered at build time, while the converter runs entirely client-side.
All processing happens in your browser. We never see, store, log, or analyze your data. There is no server-side component that touches your input.
No registration, no paywalls, no usage limits. The core conversion tool is free for everyone. Minimal, non-intrusive ads help cover hosting costs.
We handle XML attributes, CDATA, namespaces, and edge cases correctly — not just the simple cases. Our educational content is written for working developers, not introductory overviews.
We actively maintain the tool, update our educational articles with current best practices, and incorporate user feedback into new features and content.
Convert between XML and JSON with proper attribute handling, CDATA support, and namespace preservation.
Convert between YAML and JSON. Essential for Kubernetes, Docker Compose, and CI/CD pipeline configs.
Convert CSV spreadsheet data to JSON arrays and back. Handles quoted fields, headers, and dynamic typing.
Convert TOML config files (Cargo.toml, pyproject.toml) to JSON and back.
Convert Markdown to HTML with live preview. Supports GFM, code blocks, tables, and more.
Format, minify, and validate JSON with clear error messages and syntax highlighting.
Format, minify, and validate XML. Catch mismatched tags, escaping issues, and structural problems.
Encode text to Base64 or decode Base64 strings with full UTF-8 support.
Percent-encode URL components or decode encoded strings, with encodeURI vs encodeURIComponent options.
Encode and decode HTML entities with named, numeric, and full non-ASCII modes.
Decode and inspect JWT tokens. View header, payload claims, and check token expiration safely.
Convert Unix timestamps to human-readable dates and back. Auto-detects seconds vs milliseconds.
Convert between binary, octal, decimal, and hexadecimal with real-time updates and BigInt support.
Beyond our tools, we publish in-depth technical articles to help developers understand data formats and encoding at a deeper level:
Have feedback, found a bug, or want to suggest a feature? We'd love to hear from you. Visit our contact page or email us directly at contact.jdapplications@gmail.com.