Free text and data tools: JSON, tokens, cron, dates, age cut-offs, CGPA, time zones, print sizes.
Scored across 11 tools
Most tools target clearly distinct operations, such as cron_explain, timezone_convert, print_size, and ui_component_lookup. The main overlaps are between age_calculate and date_calculate, and between json_convert and json_format, where an agent could occasionally hesitate.
The set mostly follows a consistent noun_verb snake_case pattern (date_calculate, json_format, timezone_convert, ui_component_lookup). The only notable deviation is count_tokens, which is verb_noun, but it does not seriously hinder readability.
Eleven tools is well within a reasonable range for a utility toolkit, and each tool appears to earn its place by covering a specific calculation, conversion, or lookup. The surface is broad but not bloated.
Each tool covers its own utility fairly well, with useful options like time zones, working days, platform limits, and install commands. There are minor asymmetries and limits, such as JSON-to-YAML being one-way and only a few CGPA/exam presets, but no major dead end for typical utility workflows.
Exact age in years, months and days on a date, and eligibility against an age limit ("attained min, not attained max"). Built-in exam presets from official notices: upsc-cse-2026 (UPSC Civil Services 2026), ssc-chsl-2025 (SSC CHSL 2025).
Inputs: birth_date (required), exam, as_on, max_age, +1 more.
Convert CGPA to percentage or back using only formulas the board or university publishes: cbse (Percentage = 9.5 × CGPA); vtu (Percentage = (CGPA − 0.75) × 10); anna (Percentage = CGPA × 10). Each result cites the source.
Inputs: scheme (required), cgpa, percentage.
Exact OpenAI token counts (o200k_base for GPT-4o/4.1/5 and o-series, cl100k_base for GPT-4/3.5) plus labelled estimates for Claude and Gemini.
Inputs: text (required), encoding.
Describe a cron expression in plain English and list its next run times in an IANA time zone. Accepts 5-field cron, @daily-style macros and pasted crontab lines.
Inputs: expression (required), count, timezone.
Days between two dates (with years/months/days and working days), or add/subtract days, weeks, months, years or working days. Month ends clamp (31 Jan + 1 month = 28/29 Feb).
Inputs: start (required), operation (required), end, unit, +3 more.
Convert between JSON and YAML (JSON → YAML) or CSV (both directions; CSV needs a header row, JSON needs an array of objects).
Inputs: to (required), from (required), input (required).
Validate JSON and return it pretty-printed or minified, optionally with keys sorted. Errors give line and column.
Inputs: json (required), indent, sort_keys.
Convert between pixels and physical size at a DPI: pixels → print size (mm/cm/in), or physical size → pixels needed.
Inputs: width (required), height (required), direction (required), dpi, +1 more.
Count words (Unicode word rules, works for Japanese/Chinese/Hindi), characters as graphemes, sentences, paragraphs, reading time, X/Twitter weighted length, SMS segments, and platform limits.
Inputs: text (required), locale.
Convert a wall-clock date and time from one IANA time zone to another with daylight saving for that date, and report each zone's next clock change.
Inputs: date (required), time (required), to_zone (required), from_zone (required).
Search the ui.cuelark.com shadcn/ui registry (React components, blocks and themes) and get the shadcn CLI install command for each match.
Inputs: query (required), limit.
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105 tools: JSON repair, CSV, hashes, cron, dates, units, validators. 25 free calls.
QR codes, JSON diff/format, hashes, JWT, cron, timestamps, placeholders, flowcharts, forms, regex.
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Everyday calculators and converters for AI assistants: units, dates, percentages, text, JSON.
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