Network

Dissect the HTTP/3 over QUIC handshake byte-by-byte. Visualise the 1-RTT fresh handshake, session-ticket resumption, and 0-RTT early-data scenarios, with sequence diagrams, per-packet field layouts, the Retry packet, and a side-by-side comparison against TCP + TLS 1.3. Built for interview prep, protocol learning, and performance engineering.

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.

Astronomy

Compute telescope optics for visual astronomy: magnification, true field of view, focal ratio, exit pupil, limiting magnitude, Dawes/Rayleigh resolution and useful-magnification range. Enter aperture, telescope focal length, an eyepiece focal length and its AFOV (metric mm or imperial inches), pick a target (deep-sky, planetary, lunar or terrestrial), and get a scaled field-of-view overlay plus target-specific advice on exit pupil and framing.

Text Processing

Capitalize only the first letter of each sentence while preserving all other letters exactly as typed. Fixes sentence starts without disturbing acronyms, proper nouns, or intentional mixed-case.

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.

AI Tools

Score candidate RAG chunk-splitting schemes for a document across four metrics — coherence (clean sentence/paragraph boundaries), coverage (topic focus / key-term concentration), context overlap health, and chunk-size consistency — then compare up to three schemes side by side and recommend the best. Pure offline heuristics, no model calls.

Design

Solve a CSS filter chain that closely reproduces a target hex color from a monochrome base color

Text Processing

Create a glitchy / corrupted look by replacing each letter with neighbouring broken Unicode glyphs — Cyrillic/Greek look-alikes, block elements (█▓▒░), geometric shapes — for a flat smashed data-corruption aesthetic. Intensity slider + optional seed for reproducible results.

Text Processing

Repeat text N times with a chosen separator — inline, new line, or a numbered countdown. The quick tool for chat spam, dramatic build-ups, and social-media effect.

AI Tools

Generate controlled A/B variants of a prompt across the persona, tone/style, output format, and constraints dimensions, then compare them side by side with a heuristic rubric score and a word-level diff against the baseline. A reproducible way to test how a prompt behaves under different framings before picking one for production.