Tools starting with C

Calculate the compound annual growth rate between a starting and ending value.

Generate a rel=canonical link tag, with a check that the URL is suitable.

Decode the three-digit code on a ceramic capacitor into picofarads, nanofarads and microfarads.

Work out a monthly car payment from price, deposit, trade-in, tax, fees and APR, with the total interest shown.

Build APA, MLA, Chicago or Harvard citations for websites, books and journal articles.

Check whether copying and pasting work in your browser, and see why when they do not.

Convert clothing sizes between UK, US and EU, with the chest or bust measurement each corresponds to.

Convert CMYK percentages to RGB and hex for screen use.

Edit HTML, CSS and JavaScript together and see the page they make.

Find the closest CSS colour name to any colour, and see whether it is an exact match.

Pick a colour and read it back as hex, RGB, HSL, HSV, CMYK and the nearest CSS name.

See how an image or a pair of colours looks with each type of colour vision deficiency.

Check text and background colours against the WCAG 2.1 contrast requirements for AA and AAA.

Pull the dominant colours out of a picture as HEX, RGB and HSL, with CSS variables.

Build a colour palette from one base colour using harmonies, with contrast ratios and CSS variables.

Keep only the columns you need from a CSV, in the order you choose them.

Work out commission on sales, with a base salary and an optional tiered rate above target.

Project savings or investment growth with compounding and optional monthly contributions.

Shrink a scanned or image-heavy PDF by rendering its pages at a lower resolution.

Work out the concrete volume for a slab, footing or column, in cubic metres and yards.

Turn a colour photo into greyscale, with control over how far to go.

Convert between cups, tablespoons, teaspoons, millilitres and fluid ounces.

Set a timer for any length, with presets, a progress bar and an alert when it finishes.

Translate a cron expression into plain English, field by field.

Build a cron expression from common schedules and confirm what it will do.

Trim margins from every page of a PDF by setting the crop box, with an honest note on what that does.

Generate keyframes and the animation shorthand for common effects, with live preview.

Set border width, style, colour and per-side visibility, and copy the CSS.

Round each corner independently, including elliptical corners, and copy the CSS.

Build a box-shadow with live preview and copy the CSS, including inset and spread.

Design a button — colours, padding, radius, border and shadow — and copy the CSS.

Clip an element to a polygon, circle or ellipse and copy the clip-path CSS.

Escape a string so it is valid as a CSS identifier in a selector.

Stack blur, brightness, contrast, saturation, hue and more, and copy the filter.

Set direction, wrapping, alignment and gap, watch the layout respond, and copy the CSS.

Format CSS with one declaration per line, or minify it for production.

Build a frosted-glass panel with backdrop blur, translucency and border, and copy the CSS.

Build linear and radial CSS gradients visually and copy the generated background property.

Build a grid with columns, rows and gaps, preview the tracks, and copy the CSS.

Write CSS against a fixed piece of markup and see the result as you type.

Generate the paired light and dark shadows behind the soft-UI look, and copy the CSS.

Build a text-shadow with live preview on real text, and copy the CSS.

Combine translate, scale, rotate and skew, see the result live, and copy the transform.

Compare two CSV files by a key column and see which rows were added, removed or changed.

Convert CSV into an array of JSON objects, with delimiter detection and optional typing.

Turn a CSV into a paginated PDF table with sized columns and a header repeated on every page.

Convert between comma, tab, semicolon and pipe delimited files.

Convert CSV rows into XML records, with names and values escaped correctly.

Convert CSV rows into a YAML list, quoting values YAML would otherwise misread.

Check a CSV for ragged rows, duplicate headers and structural problems before importing it.

Open a CSV as a sortable, filterable table and see which rows are malformed.

Turn a curl command into JavaScript fetch, Axios or Python requests code.