Development Tools

Generate multiple unique identifiers (UUIDs) in various formats for your applications and databases.

Format, validate, and beautify JSON data with syntax highlighting and error detection.

Pick colors and convert between different formats (HEX, RGB, HSL, HSV) with an intuitive interface.

Interactive JSON tree viewer with expand/collapse, syntax highlighting, and copy functionality.

Decode JWT tokens with interactive JSON viewer and browser-based history log for successful decodes.

Compare text files and content with visual diff highlighting. Side-by-side, unified, and inline diff views with file upload support.

Add comments to JSON files using _comments sections. Parse JSON keys and generate comment fields for documentation and explanation.

Convert between hexadecimal and decimal numbers with browser-based conversion history and explanations.

Interactive JSONL (JSON Lines) viewer with expand/collapse, syntax highlighting, and line-by-line navigation. Visualize and explore newline-delimited JSON data.

Get a clear buy vs. build recommendation with break-even analysis based on purchase cost, build time, your hourly rate, and usage duration.

Calculate how much faster or slower something is after an optimization. Enter before and after values to get % improvement, speedup ratio, and time saved per operation.

Calculate pixels per inch (PPI), pixel density, dot pitch, total megapixels, and aspect ratio of any display. Supports inches and centimeters for screens and prints.

Evaluate whether to build a feature by calculating development cost, expected revenue impact, and ROI. Includes opportunity cost analysis, priority scoring, and feature ranking to guide your roadmap.

Estimate monthly AI API costs based on tokens per request, daily request volume, model pricing, and cache hit rate. Compare top AI providers and get cost optimization recommendations.

Design API rate limits without melting servers. Calculate safe RPS, per-user limits, free/pro tier limits, and overload risk score from server capacity and traffic patterns.

Estimate database cost before launching. Calculate storage needs, IO estimates, required DB size, and when to upgrade your instance based on rows, row size, and retention.

Predict when one server is not enough. Calculate concurrent requests, CPU load, memory usage, max users per server, and get recommendations on when to scale and which architecture to use.

Compare AWS vs GCP vs DigitalOcean vs Hetzner. Map resources to provider pricing and find the cheapest option with cost-performance scores for your vCPU, RAM, storage, and bandwidth needs.

Show the hidden cost of quick hacks. Calculate monthly and annual debt cost from wasted hours, bug frequency, and team size. Get refactoring ROI and a fix-now-or-later recommendation.

Price freelance or internal development work. Calculate true hourly cost from salary, benefits, taxes, and billable hours. Get a suggested freelance rate and project cost estimates.