All-in-One Tools Collection
A broad collection of online tools for development, AI, design, and productivity tasks.
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NSFW Image Content Detector
AI-powered image content safety detector using NSFWJS to classify potentially inappropriate content with fallback analysis, supporting GIF/Animated WebP/APNG and JPEG/PNG/WEBP.
Chi-Square Test Calculator
Run chi-square goodness-of-fit or independence tests from observed counts or contingency tables
One Proportion Z Test Calculator
Run a one-proportion Z test from success count, trial count, and hypothesized population proportion
Two Proportion Z Test Calculator
Compare two independent proportions with a pooled two-proportion Z test and confidence interval
Paired t Test Calculator
Run paired-sample t tests from before and after values or precomputed paired differences
Two Sample t Test Calculator
Run an independent two-sample t test with pooled variance from raw data or summary statistics
Welch t Test Calculator
Run Welch two-sample t tests for independent groups with unequal variances from raw data or summary statistics
Z Test Calculator
Run one-sample Z tests for a mean with known population standard deviation or a single population proportion
Effect Size Calculator
Calculate Cohen d, Hedges g, Cohen h for proportions, or correlation r effect sizes from summary statistics
One Sample t Test Calculator
Run a one-sample t test from raw data or summary statistics, including p-value and confidence interval
Statistical Power Calculator
Estimate statistical power for one-sample mean or proportion tests using sample size, alpha, and expected effect
VP8 Image Analyzer
Analyze a WebP/VP8 image with Sharp, generate a grayscale displacement map, and render it as an interactive Three.js 3D relief surface