Handle JSON, JWT and cURL while debugging APIs
Developer Collection
Online Developer Tools Launchpad
API debugging, data conversion, regex testing, Git reference, Markdown, SQL, Docker, Cron and SEO meta tools.
A daily developer toolbox that brings together JSON utilities, data conversion, cURL to code, JWT parsing, regex testing, Git cheatsheets, Markdown preview, SQL formatting, Docker Compose conversion, Cron expressions, HTTP status codes and meta tag generation.
16Curated tools
3Workflows
3FAQ answers
Built for these intents
Preview Markdown, format SQL or look up Git commands while writing docs
Test regex, keyboard events and device details for frontend debugging
Generate SEO, OG and Twitter Card tags before publishing pages
Tools in this hub
JSON Formatter
Beautify, minify and validate JSON data with syntax error detection. Catch malformed brackets and commas before they break your API integration.
Data Format Converter
Convert between JSON, YAML, TOML, XML and CSV in one place with a single paste and instant preview for multi-format config and data conversion.
cURL to Code
Convert cURL commands to Python, JavaScript, PHP, Go, Java code with auth and JSON body. Turn terminal snippets into runnable client code fast.
JWT Parser
Decode and inspect JWT tokens (header, payload, expiry) with signature check. Inspect auth claims and expiry without sending secrets anywhere.
Regex Tester
Test JavaScript regular expressions with flags like g, i, m, s and u plus capture groups for building, debugging and validating match patterns.
Git Cheatsheet
Quick reference for common git commands like init, commit, branch, merge and rebase for daily version control workflow and troubleshooting lookups.
Markdown Preview
Render Markdown to HTML in real time with markdown-it, GFM, code blocks and tables, a live writing companion for documentation and README files.
SQL Formatter
Format and indent SQL queries with a regex-based prettifier for SELECT, INSERT and UPDATE statements to keep database code clean and readable.
docker run to compose
Convert a docker run command into docker-compose.yml with ports, volumes and env vars for migrating ad-hoc containers to managed orchestration stacks.
Crontab Generator
Free online cron expression builder with visual editor and human-readable preview. Schedule jobs confidently without guessing asterisk positions — no login, no setup.
HTTP Status Codes
Reference for HTTP status codes (1xx-5xx) with meanings, examples and use cases. Debug API responses faster by looking up 404, 503 and every code.
Open Graph Meta Generator
Generate meta tags for SEO, Open Graph and Twitter cards with live preview. Make your share links look right on Facebook, X and search results.
Open Graph Meta Generator
Build Open Graph and Twitter Card meta tags with live preview and social sharing. Preview exactly how cards render before you ship the page.
Keycode Info
Show the key code and event details for any keypress (keyCode, key, code, location). Build shortcuts and game controls with the right codes.
Device Information
Display browser, OS, screen, GPU and runtime info with viewport, pixel ratio and more. Debug responsive layouts and feature detection on the fly.
HTML WYSIWYG Editor
Visual rich-text editor that outputs clean HTML with bold, italic, lists and links for drafting emails, blog posts and content management systems.
Suggested workflows
API development
Format JSON, inspect JWT tokens and convert cURL commands into application code.
Engineering config
Convert data formats, generate docker-compose files and check Cron expressions.
Frontend release
Generate meta tags, prepare Open Graph previews and inspect device details for compatibility.
How this developer hub helps
Collects daily micro-tasks
Developers repeatedly format, convert, validate, reference and generate snippets; this page keeps common tasks together.
Avoids temporary dependencies
Many one-off tasks do not justify installing a CLI or opening a large IDE.
Easy to share with teams
Add the hub link to internal docs so teammates use the same tools for common debugging work.
Developer tools FAQ
Do these tools require sign-in?
No. OLTool utilities are free to use and most features work immediately after loading.
Are they suitable for internal team usage?
Yes. Data is processed locally in the browser, which is helpful for common debugging snippets.
How is this different from the homepage?
The homepage lists everything; this developer hub highlights the most common programming workflow tools.