Developer
Love compatibility, random generators, GPA, and just-for-fun tools.
16 calculators in Developer
AI Token Cost Calculator
Estimate API costs for GPT-4o, Claude, Gemini, and other LLMs based on token usage.
AI Token & Word Count Calculator
Convert between AI tokens, words, and characters with cost estimation.
API Rate Limit Calculator
Plan your API usage by calculating max throughput, operations per day, delay between requests, and burst capacity.
AWS Lambda vs EC2 Cost Calculator
Compare serverless (Lambda) vs server (EC2) monthly costs. Find the break-even point to determine which is more cost-effective for your workload.
Base64 Encoder / Decoder
Encode and decode Base64 strings with full Unicode support.
Cloud vs Local Storage Cost Calculator
Compare the total cost of cloud storage vs buying local drives over time, including electricity and break-even analysis.
Color Contrast Checker
Check WCAG color contrast ratio for web accessibility.
Font Size vs. Distance Calculator
Calculate the minimum readable font size for any viewing distance — screens, signage, presentations, and more.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic hashes from any text input.
JSON Formatter & Validator
Format, validate, and minify JSON with customizable indentation.
Pixel to REM Converter
Convert between pixels and rem units for responsive web design.
Tech Debt Calculator
Estimate the hidden cost of technical debt on your team in time and money.
Text Diff Checker
Compare two texts line by line and highlight the differences.
Timestamp Converter
Convert between various timestamp formats.
Uptime Calculator
Convert uptime percentage to allowed downtime per day, week, month, and year with SLA tier reference.
UUID Generator
Generate random UUID v4 identifiers with cryptographic randomness.