Math & Numbers
Compute buoyant force, fluid density, or displaced volume from any two, with optional float/sink analysis
buoyancy-calculatorMath & 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 +/−/×/÷.
significant-figures-sandboxDesign
A curated 2026 reference of image dimensions for Instagram, Facebook, X, LinkedIn, YouTube, TikTok, Pinterest and WeChat — filterable by platform.
social-media-image-size-cheatsheetMath & Numbers
Combine capacitors in series/parallel, compute reactance Xc and RC time constant, with schematics and a reactance curve
capacitor-calculatorDevelopment
Surgically repair malformed CSV rows one at a time: unescaped (stray) quotes, mixed delimiters (tab/semicolon/comma in the same file), BOM-prefixed headers, CRLF/CR line endings and trailing empty lines. The surgeon parses tolerantly, shows a row-level red/green diff of every change it made (before → after, with the repair reason tagged), lists the rows it accepted unchanged, and emits the cleaned CSV. Optional AI repair can review suspicious rows after the deterministic pass. It complements the CSV Validator (which only reports problems) by actually fixing the damaged rows.
csv-malformed-row-surgeonMath & Numbers
Combine resistors in series, parallel, or an arbitrary +/| expression, with per-resistor voltage and power
resistor-series-parallel-calculatorDevelopment
Format and beautify minified or messy CSS code into readable, well-indented stylesheets
css-beautifierDevelopment
Map messy CSV headers onto a clean target schema. Paste a CSV whose first row holds inconsistent column names (Customer ID, user_id, customerId, CUST_ID…) plus your target schema (one column per line) and an optional "alias=target" dictionary. Each source header is resolved through four layered passes — exact, dictionary, normalized (strips case/accents/separators/camelCase), then fuzzy edit-distance — and shown in a mapping table with method and confidence, plus target coverage and an optional normalized CSV export.
csv-header-alias-resolverData Visualization
Bin numeric data into intervals and draw a histogram to visualize a statistical distribution
histogram-makerDevelopment
Compress HTML by removing comments, collapsing whitespace and minifying inline CSS/JS
html-minifierFormat Conversion
Compress JSON data by removing all unnecessary whitespace
json-minifierFormat Conversion
Encode, decode, and brute-force the Caesar cipher with any shift (1–25), or print all 25 candidate decodings.
caesar-cipher