Built for people, usable by agents.

Two ways in

check_contrast({ foreground: "#767676", background: "#ffffff" })
→ { ratio: 4.54, passes: { "AA normal text": true, "AAA normal text": false, ... } }

25 agent tools

• list_tools

  Every tool on jigg.dev with its URL, one-line description and tags.

• open_tool

  Navigates this tab to one of the site's tools, so the person can use it themselves.

  slug

• convert_number_baseNumber base converter

  Converts a whole number (any size) from one base (2-36) to binary, octal, decimal, hex and an optional extra base.

  value, from?, to?

• convert_unitsUnit converter

  Converts a value between units of length, weight, temperature, volume, area, speed, data, time.

  value, from, to

• csv_to_jsonCSV to JSON

  Parses CSV (quoted fields and newlines in cells are fine) into JSON rows.

  csv, delimiter?, header?, types?

• json_to_csvCSV to JSON

  Turns a JSON array of objects (keys become columns) or of arrays into CSV.

  json, delimiter?

• date_differenceDate difference

  Years, months and days between two dates, plus total days, weeks and business days (Mon-Fri).

  from, to

• aspect_ratioAspect ratio calculator

  Simplifies a width and height to a ratio (1920x1080 is 16:9), names the nearest common ratio, and optionally solves a new size at that ratio.

  width, height, newWidth?, newHeight?

• check_contrastContrast checker

  WCAG 2.2 contrast ratio of a text color on a background, and which levels (AA, AAA, large text, UI) it passes.

  foreground, background

• color_paletteColor palette

  A 50-950 shade scale of one color, plus a matching harmony (complementary, analogous, triadic, split, tetradic).

  color, harmony?

• generate_passwordPassword generator

  A random password from the browser's crypto randomness, with at least one character from each chosen set. Never leaves the device.

  length?, sets?, avoidAmbiguous?

• generate_idsUUID generator

  Random UUID v4, time-ordered UUID v7, or ULID values.

  kind?, count?

• hash_textHash generator

  Hex digest of UTF-8 text with MD5, SHA-1, SHA-256, SHA-384, SHA-512.

  text, algorithm?

• encode_textEncode & decode

  Base64, Base64URL, URL (percent) or HTML entity encoding.

  text, codec, direction?

• decode_jwtJWT decoder

  Reads a JSON Web Token's header and payload. Does not check the signature.

  token

• format_jsonJSON formatter

  Pretty-prints or minifies JSON, optionally sorting keys; invalid JSON comes back with the line and column of the error.

  json, indent?, sortKeys?

• count_wordsWord counter

  Words, characters, sentences, paragraphs and reading and speaking time of a text.

  text

• test_regexRegex tester

  Runs a JavaScript regex over text and returns the matches with their groups, plus a plain-English reading of the pattern.

  pattern, flags?, text

• explain_cronCrontab editor

  Describes a five-field cron expression (or @daily style macro) in plain English and lists its next run times in UTC.

  expression, count?

• convert_timestampTimestamps

  Reads Unix seconds, Unix milliseconds or a date string and returns it in common formats.

  input

• run_pipelineWorkbench

  Runs text through a chain of steps, such as CSV to JSON then sort keys, or Base64 encode then SHA-256, and returns every step's output. The first failing step ends the chain.

  text, steps

• calculate

  Evaluates arithmetic with the usual order of operations (PEMDAS): + - * / ^, parentheses, mod, 15% of 80, 5!, sqrt() and other functions, pi and e.

  expression

• describe_colorCamera color picker

  A color as hex, rgb(), hsl() and oklch(), with the closest CSS color name. Takes any of those forms or a name.

  color

• inspect_idUUID generator

  Which UUID version and variant an ID is (or that it's a ULID), and when it was made for time-based IDs (v1, v6, v7, ULID).

  id

• parse_url

  Splits a URL into protocol, host, path, decoded query parameters and fragment.

  url