All-in-One Tools Collection
A broad collection of online tools for development, AI, design, and productivity tasks.
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Percentage Increase Calculator
Calculate the percentage increase between an original value and a new value
Color Token Cascade Generator
Turn one primary hex color into a full design-token cascade with primary, accent, neutral, semantic tokens, CSS variables, and Style Dictionary JSON
Fraction to Decimal Calculator
Convert fractions or mixed numbers into decimals with configurable precision and percentage output
Percentage Calculator
Solve common percentage questions including percentage of a total, value from a percentage, and percentage change
Time Zone Workflow Scheduler
Compare multiple participants across time zones, find overlapping working windows, and export the best meeting slots to ICS
API Response Diff & Semantic Analyzer
Compare two API response payloads, highlight field-level diffs, and classify likely functional changes versus harmless runtime drift
Mock Data Prefix / Abbreviation Conflict Detector
Detect visually confusing field names and prefix collisions in CSV, JSON, or schema inputs, then suggest clearer renames
ReDoS (Regular Expression Denial of Service) Scanner
Scan one or more regex patterns for catastrophic backtracking risk, simulate evil inputs, and suggest safer rewrites
AI Markdown Article Translator
Translate full Markdown articles with AI while preserving headings, tables, links, images, and code blocks for direct publication
CSS Masonry Layout Generator
Generate pure CSS masonry-style layouts with responsive breakpoints, configurable gaps, and optional full-width skip selectors
Log Sequence Diagram Converter
Convert structured service logs into Mermaid or PlantUML sequence diagrams, with optional latency and error annotations
API Contract Mutation Tester
Mutate OpenAPI request fields into semantically risky variants and optionally send them to a real backend to check defensive validation coverage