Health

Solve for pace, finish time or distance given the other two. Enter a known distance and either a finish time or a pace, and get the missing value plus speed and optional Riegel race predictions.

Health

Find the best bedtime or wake time based on the brains 90-minute sleep-cycle rhythm. Enter a target wake time and get recommended bedtimes, or enter a bedtime to project forward.

Development

Parse Tailwind utility classes into equivalent plain CSS for non-Tailwind projects.

Media

Stream-copy trimming.

Media

Readable stream and codec report for media files.

Media

Rewrap media containers with stream copy.

Math & Numbers

Practice significant-figure rules with step-by-step feedback: count sig figs, round to N sig figs, convert to scientific notation, and propagate through +/−/×/÷.

Design

A curated 2026 reference of image dimensions for Instagram, Facebook, X, LinkedIn, YouTube, TikTok, Pinterest and WeChat — filterable by platform.

Design

Paste Tailwind classes that use arbitrary values (w-[137px], text-[#bada55], grid-cols-[1fr_2fr], [mask-type:luminance]) and inspect the generated CSS, with a live visual preview, data-type hint detection, and an explanation of each translation. Useful for debugging calc(), CSS variables, and one-off values that escape the design token scale.

Text Processing

Convert text to Sentence case: capitalize the first letter of each sentence and lowercase everything else. Auto-restores the standalone pronoun "I".

Text Processing

Generate clean URL slugs from any text, with built-in Chinese-to-Pinyin conversion. Collapse separators, lowercase, and optional max-length word-aware truncation.

Development

Beautify or minify SQL with full control over dialect (PostgreSQL, MySQL, SQLite, SQL Server/T-SQL, BigQuery, Snowflake, and more), keyword / identifier / function casing, indent style (standard, tabular-left, tabular-right), and spacing between statements. Produces a syntax-highlighted, copy-ready result with live size and statement stats.