Format, convert & inspect developer data — fast
dev-tool-x is a free, browser-based toolkit for everyday developer chores. Pick a tool, paste your data, and get instant results — no sign-up, no file uploads to servers.
Why dev-tool-x
Instant, in-browser
All transformations run locally — nothing is sent to a server.
No sign-up
Paste your data and get results immediately. No accounts, no limits.
49+ tools in one place
JSON, XML, YAML, HTML, CSS, TypeScript, Base64, URL — and growing.
Browse tools
Language Formatters
GraphQL
Markdown
59 tools total
Use the ⌘K search or Tools menu to find any tool instantly.