Free Developer Tools Online
Rafiqy's developer toolkit gives you fast, no-frills tools for everyday coding tasks. Format and validate JSON, test regex patterns, generate mock data for testing, convert between config formats (JSON/YAML/TOML), analyze logs, and map database schemas — all without leaving your browser. No API keys, no rate limits, no accounts.
Tools in this category
- 🔧 JSON FormatterFormat, validate & explore JSON
- 🔍 Regex TesterLive regex tester with match highlighting and replace mode
- 🎲 Mock Data GeneratorGenerate bulk test data from a simple schema
- 🔄 Privacy-First Data TransformerConvert JSON, CSV & TSV 100% client-side
- ⚙️ Config Polyglot ConverterConvert .env ↔ JSON ↔ YAML ↔ TOML instantly
- 🪵 Smart Log AnalyzerCluster errors and copy unique traces for AI
- 🗺️ Schema Field MapperVisually map fields between schemas — generate transform code
- 🔗 Distributed Trace CorrelatorCorrelate requests across microservices instantly
- 📄 LLM-Ready Markdown ScraperTurn any URL into clean Markdown for AI
- 🎨 Color Palette GeneratorGenerate harmonious color palettes with WCAG contrast check
- ⚡ Text Diff CheckerCompare two texts side by side with inline word highlighting
Useful guides for this category
- How to Build an Accessible Color Palette Without GuessingA practical guide to creating cleaner UI color systems with harmony and contrast checks instead of trial and error.
- How to Compare Two Versions of Text and See the Exact ChangesA practical guide to checking edits in content, contracts, copy, notes, or code snippets without manually scanning line by line.
- How to Convert CSV, JSON, and TSV Without Uploading Private DataA practical guide to converting structured data locally when your files include customer, log, or internal information you should not upload casually.
- How to Convert .env, JSON, YAML, and TOML Without Breaking ConfigA practical guide to moving config safely between formats when syntax mistakes can break a deployment, script, or local environment.
- How to Format and Validate JSON Before Sharing or Importing ItA practical guide to cleaning, validating, and reading JSON so API payloads and config files stop breaking for simple formatting reasons.
- How to Map Fields Between Two Systems Without ConfusionA practical guide to mapping fields between forms, APIs, sheets, or databases when names no longer line up cleanly.